WO2004020549A1 - 有機金属錯体、有機el素子及び有機elディスプレイ - Google Patents
有機金属錯体、有機el素子及び有機elディスプレイ Download PDFInfo
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- WO2004020549A1 WO2004020549A1 PCT/JP2003/010847 JP0310847W WO2004020549A1 WO 2004020549 A1 WO2004020549 A1 WO 2004020549A1 JP 0310847 W JP0310847 W JP 0310847W WO 2004020549 A1 WO2004020549 A1 WO 2004020549A1
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- organic
- ligand
- rhenium
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- 125000002524 organometallic group Chemical group 0.000 title claims abstract description 189
- 239000003446 ligand Substances 0.000 claims abstract description 252
- 125000004429 atom Chemical group 0.000 claims abstract description 223
- 229910052702 rhenium Inorganic materials 0.000 claims abstract description 191
- WUAPFZMCVAUBPE-UHFFFAOYSA-N rhenium atom Chemical group [Re] WUAPFZMCVAUBPE-UHFFFAOYSA-N 0.000 claims abstract description 191
- 238000006243 chemical reaction Methods 0.000 claims abstract description 175
- 229910052757 nitrogen Inorganic materials 0.000 claims abstract description 128
- 125000004433 nitrogen atom Chemical group N* 0.000 claims abstract description 116
- 229910052751 metal Inorganic materials 0.000 claims abstract description 79
- 125000004432 carbon atom Chemical group C* 0.000 claims abstract description 74
- 239000002184 metal Substances 0.000 claims abstract description 71
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- 230000007935 neutral effect Effects 0.000 claims abstract description 52
- 229910052799 carbon Inorganic materials 0.000 claims abstract description 48
- 125000001931 aliphatic group Chemical group 0.000 claims abstract description 34
- 125000001072 heteroaryl group Chemical group 0.000 claims abstract description 31
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- 239000000463 material Substances 0.000 claims description 172
- 238000000034 method Methods 0.000 claims description 161
- 125000001424 substituent group Chemical group 0.000 claims description 100
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 claims description 64
- 125000003118 aryl group Chemical group 0.000 claims description 62
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- 229910052717 sulfur Inorganic materials 0.000 claims description 43
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- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical group CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 claims description 15
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- NAWXUBYGYWOOIX-SFHVURJKSA-N (2s)-2-[[4-[2-(2,4-diaminoquinazolin-6-yl)ethyl]benzoyl]amino]-4-methylidenepentanedioic acid Chemical compound C1=CC2=NC(N)=NC(N)=C2C=C1CCC1=CC=C(C(=O)N[C@@H](CC(=C)C(O)=O)C(O)=O)C=C1 NAWXUBYGYWOOIX-SFHVURJKSA-N 0.000 claims description 8
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Classifications
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- C07F13/00—Compounds containing elements of Groups 7 or 17 of the Periodic Table
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- H10K85/346—Transition metal complexes, e.g. Ru(II)polypyridine complexes comprising platinum
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Definitions
- the present invention relates to an organometallic complex which emits phosphorescence and is suitable as a light-emitting material, a color conversion material, and the like in an organic EL device, an organic EL device using the organometallic complex, and the organic metal complex or the organic EL device.
- the present invention relates to an organic EL display using an element. Background art
- the organic EL device has a structure in which one or more thin organic layers are sandwiched between a negative electrode and a positive electrode, and holes are injected from the positive electrode and electrons are injected from the negative electrode into the organic material layer, respectively.
- the recombination energy when the holes and the electrons recombine in the organic layer excites the luminescent center of the luminescent material in the organic layer, and the luminescent material is deactivated from the excited state to the ground state. It is a light emitting element using light emitted at the time.
- the organic EL device has characteristics such as self-luminous light and high-speed response, has good visibility, is ultra-thin, lightweight, and has excellent high-speed response and moving image display. It is expected to be applied to panel displays.
- pixels that emit light of three primary colors of blue (B), green (G), and red (R) must be arranged on a panel.
- a first method for example, blue (B)
- a method of arranging three kinds of organic EL elements that emit green (G) and red (R) light is known (for example, see Japanese Patent Application Laid-Open No. 3-214593).
- the second method is, for example, white light emission (color mixture of blue (B), green (G), and red (R) light).
- Is known in which light emitted from an organic EL element is separated into three primary colors by a color filter for example, see Japanese Patent Application Laid-Open No. 3-194485).
- a third method for example, a method is known in which light emitted from an organic EL element that emits blue light is converted into green (G) and red (R) light by a color conversion layer that uses fluorescent light.
- G green
- R red
- a blue organic EL element is formed on the entire surface of the substrate, the blue portion of the pixel emits light as it is, and the green and red portions of the pixel are converted to the blue color by the color conversion layer.
- the display Since the wavelength of the light emitted from the organic EL element is converted and extracted, the display is excellent in manufacturability, the luminous efficiency can be expected to be high theoretically, and the luminescent material is the blue organic EL element. Since only the light-emitting material is used, it is advantageous in that the color of the display does not change with time.
- the color balance in the display cannot be obtained because the color conversion efficiency in the color conversion layer is low.
- the color balance was adjusted by adjusting the current value flowing through the organic EL element according to the emission color, but in this case, the deterioration of the organic EL element was accelerated only for pixels with a specific emission color, and the color balance was adjusted.
- the full-color display according to the third method is an average drive.
- a dynamic current that is constant irrespective of the light-emitting pixels and has a good color balance without changing the light-emitting area has not yet been provided. It is strongly desired to provide such a full-color display.
- a fluorescent light emitting material is generally used for the color conversion layer.
- the fluorescent light contained in the color conversion layer is used. It is necessary that the material efficiently absorbs the blue light emitted from the blue organic EL device and converts the color into red light with high quantum efficiency.
- the absorption peak of a red fluorescent luminescent material having an emission peak in the red wavelength region (600 to 600 nm) is usually in the green wavelength region (500 to 600 nm). The blue light emitted by the blue organic EL element cannot be efficiently absorbed.
- a host material that efficiently absorbs blue light is used together with the red fluorescent light emitting material.
- the host material absorbs the blue light to be in an excited state, and emits energy when returning from the excited state to the ground state. Is absorbed by the red fluorescent light-emitting material to be in an excited state, and emits red light when returning from the excited state to the base state. As a result, blue light is converted into red light.
- the red fluorescent light emitting material in the case of the color conversion layer in which the red fluorescent light emitting material and the host material are used in combination, most of the red fluorescent light emitting materials form an association state called excimer when dispersed in the host material at a high concentration. Then, the emission is significantly reduced (concentration quenching) or emission of a wavelength different from the original emission occurs. To obtain the original emission, the red fluorescent material is added at a low concentration. While it is necessary to disperse in the host material, from the viewpoint of the efficiency of energy transfer from the host material, it is necessary to disperse in the host material at a certain high concentration.
- Non-patent document 1 is used as a ligand, and when this ligand is used as a light emitting material, PL quantum efficiency is lowered and light resistance is deteriorated. And the half life of the luminance becomes very short.
- Non-patent document 1 is used as a ligand, and when this ligand is used as a light emitting material, PL quantum efficiency is lowered and light resistance is deteriorated. And the half life of the luminance becomes very short.
- Patent Document 1
- Patent Document 2 Japanese Patent Laid-Open No. 3-1 9485
- Patent Document 5
- the present invention was made in view of the above-mentioned present situation, and makes it a subject to solve the conventional problem and to achieve the following objects.
- the present invention provides an organometallic complex which emits phosphorescent light and is suitable as a luminescent material, a color conversion material, and the like in an organic EL device, using the organometallic complex to provide a longevity, luminous efficiency, thermal, electrical stability,
- An organic EL element that is excellent in color conversion efficiency and the like, and is suitable for a lighting device, a display device, and the like, and that uses the organometallic complex or the organic EL element to have high performance and a long life, and that the average driving current depends on the emission pixel. It is an object of the present invention to provide an organic EL display suitable for a full-color display or the like having a good color balance without changing the light emitting area. Disclosure of the invention
- a specific organometallic complex that emits phosphorescence is suitable as a luminescent material, a color conversion material, and the like in an organic EL device.
- an organic EL device using the organometallic complex as a luminescent material, a color conversion material, and the like is excellent in life, luminous efficiency, thermal and electrical stability, and are high-performance.
- the first organometallic complex according to the present invention is an organorhenium complex, which has a rhenium (Re) atom, a nitrogen atom and an oxygen atom coordinated to the rhenium (Re) atom, and has at least a ⁇ -conjugated moiety.
- a rhenium (Re) atom a nitrogen atom and an oxygen atom coordinated to the rhenium (Re) atom
- has at least a ⁇ -conjugated moiety One of the ligands, the rhenium (R e) atom, the coordination number of the rhenium (Re) atom, and the organic lithium And other ligands that coordinate to keep the charge of the entire complex neutral.
- the second organometallic complex in the present invention is an organorhenium complex, which has a rhenium (R e) atom, a nitrogen atom and a carbon atom coordinated to the rhenium (R e) atom, and has a ⁇ -conjugated moiety.
- the third organometallic complex according to the present invention has at least one group 8 metal atom selected from group 8 metal elements and at least one ⁇ -conjugated moiety, and coordinates to the group 8 metal atom.
- a dithiolate ligand selected from an aliphatic dithiolate ligand and a heteroaromatic dithiolate ligand and coordinated to the Group 8 metal atom.
- the organometallic complex is suitable as a light-emitting material, a color conversion material, and the like in an organic EL device and the like.
- the first to third organometallic complexes are used as a color conversion material for a color conversion layer of the organic EL device or the like, it is not necessary to use a host material in the color conversion layer, and the organic metal complex is not required. For example, ultraviolet light or blue light can be directly converted to red light only with the complex.
- the one ligand or the dithiolate ligand, the kind and number of the substituents, etc., the emission color can be changed; and the central metal has a melting point and a very high boiling point. Since it is a high heavy metal such as rhenium (R e) or the group 8 metal element, it is excellent in thermal and electrical stability in the whole organometallic complex.
- the dithiolate ligand when the dithiolate ligand is an aliphatic dithiolate ligand or a heteroaromatic dithiolate ligand, the dithiolate ligand is an aromatic dithiolate ligand. Compared to, it has better light stability, better luminescence quantum efficiency, higher color strength, and better storage stability in coating solutions. Color conversion efficiency.
- the one ligand is a bidentate ligand.
- a nitrogen atom and an oxygen atom in the bidentate ligand are directly bonded to the rhenium (R e) atom
- the nitrogen atom and carbon atom in the bidentate ligand are directly bonded to the rhenium (R e) atom
- the third organometallic complex the two coordination atoms in the bidentate ligand And the group 8 metal atom are directly bonded.
- the one ligand (the bidentate ligand) exhibits a large interaction with the rhenium (R e) atom or the group VIII metal atom.
- the first coordination occurs when each of the first to third organometallic complexes is used as a light-emitting material, a color conversion material, or the like in an organic EL device or the like, when the electric field is applied to the organic EL device or the like.
- the singlet exciton and the triplet exciton generated in the organometallic complex by the large interaction between the exciton and the rhenium (R e) atom or the group VIII metal atom cause the thermal energy without radiation. Inactivation as rotation energy or the like is effectively suppressed, and is efficiently converted to light energy as fluorescence and phosphorescence.
- the first organic EL device of the present invention has an organic thin film layer between a positive electrode and a negative electrode, and the organic thin film layer contains at least one of the first to third organometallic complexes as a light emitting material. Contained as The first organic EL device emits light of the organometallic complex of the present invention. Since it is contained as a material, it has excellent life, luminous efficiency, and durability.
- the second organic EL device of the present invention has a color conversion layer, and the color conversion layer contains any one of the first to third organometallic complexes as a color conversion material.
- the color conversion layer contains the organometallic complex of the present invention as a color conversion material, it is excellent in life, color conversion efficiency, and the like. With the complex alone, for example, ultraviolet light or blue light can be directly converted to red light.
- organic EL elements of the present invention are particularly suitable for, for example, lighting devices, display devices, and the like f .
- the organic EL display of the present invention uses at least one of the first and second organic EL elements of the present invention. Since the organic EL display uses the organic EL element of the present invention, it is excellent in life, luminous efficiency, color conversion efficiency, and the like. BRIEF DESCRIPTION OF THE FIGURES
- FIG. 1 is a schematic explanatory diagram for explaining an example of a layer configuration in the organic EL device of the present invention.
- FIG. 2 is a schematic diagram for explaining an example of the structure of a passive matrix organic EL display (passive matrix panel).
- FIG. 3 is a schematic explanatory diagram for explaining a circuit in the passive matrix organic EL display (passive matrix panel) shown in FIG.
- FIG. 4 is a schematic diagram for explaining an example of the structure of an active matrix type organic EL display (active matrix panel).
- FIG. 5 is a schematic diagram for explaining a circuit in the active matrix organic EL display (active matrix panel) shown in FIG.
- FIG. 6 is a schematic explanatory view for explaining one structural example of the organic EL display.
- FIG. 7 is a schematic explanatory view for explaining one structural example of the organic EL display.
- FIG. 3 is a schematic explanatory diagram for explaining one structural example.
- FIG. 9 is a graph of an emission spectrum of an example of the organometallic complex (organoplatinum complex) of the present invention.
- FIG. 10 is a graph of an emission spectrum of an example of the organometallic complex (organoplatinum complex) of the present invention.
- FIG. 11 is a graph of an emission spectrum of one example of the organometallic complex (organoplatinum complex) of the present invention.
- FIG. 12 is a graph of a light emission spectrum of one example of the organometallic complex (organoplatinum complex) of the present invention. .
- FIG. 13 is a graph of an emission spectrum of an example of the organometallic complex (organoplatinum complex) of the present invention.
- FIG. 14 is a graph of the emission spectrum of one example of the organometallic complex (organoplatinum complex) of the present invention.
- FIG. 15 is a graph of an emission spectrum of an example of the organometallic complex (organoplatinum complex) of the present invention.
- FIG. 16 is a graph of an emission spectrum of an example of the organometallic complex (organoplatinum complex) of the present invention.
- FIG. 17 is a graph of an emission spectrum of an example of the organometallic complex (organoplatinum complex) of the present invention.
- FIG. 18 is a graph of an emission spectrum of an example of the organometallic complex (organoplatinum complex) of the present invention.
- FIG. 19 is a graph of a light emission spectrum of an example of the organometallic complex (organoplatinum complex) of the present invention.
- FIG. 20 is a graph of an emission spectrum of an example of the organometallic complex (organoplatinum complex) of the present invention.
- FIG. 21 is a graph of an emission spectrum of an example of the organometallic complex (organoplatinum complex) of the present invention.
- FIG. 22 is a graph of an emission spectrum of one example of the organometallic complex (organoplatinum complex) of the present invention.
- FIG. 23 is a graph of an emission spectrum of an example of the organometallic complex (organoplatinum complex) of the present invention.
- FIG. 24 is a graph of the emission spectrum of one example of the organometallic complex (organoplatinum complex) of the present invention.
- FIG. 25 is a graph of the emission spectrum of one example of the organometallic complex (organoplatinum complex) of the present invention.
- FIG. 26 is a graph of an emission spectrum of one example of the organometallic complex (organoplatinum complex) of the present invention.
- FIG. 27 is a graph of an emission spectrum of an example of the organometallic complex (organoplatinum complex) of the present invention.
- FIG. 28 is a graph of the emission spectrum of one example of the organometallic complex (organoplatinum complex) of the present invention.
- FIG. 29 is a graph of the emission spectrum of one example of the organometallic complex (organoplatinum complex) of the present invention.
- FIG. 30 is a graph of the emission spectrum of one example of the organometallic complex (organoplatinum complex) of the present invention.
- FIG. 31 is a graph of an emission spectrum of an example of the organometallic complex (organoplatinum complex) of the present invention.
- FIG. 32 is a graph of an emission spectrum of an example of the organometallic complex (organoplatinum complex) of the present invention.
- Figure 33 is a graph of the emission spectrum of an example of a comparative organometallic complex (organoplatinum complex).
- Figure 34 is a graph of the emission spectrum of an example of a comparative organometallic complex (organoplatinum complex).
- the first organometallic complex is an organorhenium complex, which has a rhenium (R e) atom, a nitrogen atom and an oxygen atom coordinated to the rhenium (Re) atom, and has at least one ⁇ -functional portion.
- One of the ligands and the rhenium (R e) atom so as to saturate the coordination number of the rhenium (Re) atom, and to keep the charge of the whole organic rhenium complex neutral. And other ligands to coordinate.
- the second organometallic complex is an organorhenium complex, which has a rhenium (Re) atom, a nitrogen atom and a carbon atom coordinated to the rhenium (Re) atom, and has at least one ⁇ -functional moiety.
- One of the ligands and the rhenium (R e) atom to saturate the coordination number of the rhenium (R e ) atom and to keep the charge of the whole organic rhenium complex neutral. And other ligands to coordinate.
- the third organometallic complex has at least one Group 8 metal atom selected from Group 8 metal elements and at least one ⁇ -conjugated moiety, and is coordinated with the Group 8 metal atom. And a dithiolate ligand selected from an aliphatic dithiolate ligand and a heteroaromatic dithiolate ligand, and coordinated to the Group 8 metal atom.
- First organometallic complex organorhenium complex
- the first organometallic complex has a rhenium (R e) atom, a nitrogen atom and an oxygen atom coordinated to the rhenium (R e) atom, and has at least a ⁇ -conjugated moiety.
- One of the ligands and the rhenium (Re) atom are provided so as to saturate the coordination number of the rhedium (Re) atom and to keep the charge of the entire organic rhenium complex neutral.
- the electron orbital overlap between the one ligand and the rhenium (Re) atom It is preferable that electrons can be exchanged with each other.
- the one ligand has at least two ring structures, and one of the ring structures has a nitrogen atom coordinated to the rhenium (R e) atom, and the other has a ring structure. It is preferable that one cyclic structure has an oxygen atom coordinated to the rhenium (R e) atom.
- the one cyclic structure and the other cyclic structure are a 5-membered ring and A structure in which carbon atoms in the one ring structure and the other one of the six ring members are bonded to each other, or A structure in which some of the carbon atoms are shared is particularly preferred.
- Preferred specific examples of the first organic rhenium complex include those represented by the following structural formulas (1) and (4).
- R 1 and R 2 may be the same or different, and represent a hydrogen atom or a substituent.
- the substituent is not particularly limited and may be appropriately selected depending on the intended purpose. Examples thereof include a halogen atom, an alkoxy group, an amino group, an alkyl group, a cycloalkyl group, a nitrogen atom and a sulfur atom. Represents an aryl group which may be substituted, or an aryloxy group which may contain a nitrogen atom or a sulfur atom, and these may be further substituted.
- R 1 and R 2 may be bonded to each other adjacent to each other to form an aromatic ring which may contain a nitrogen atom, a sulfur atom or an oxygen atom. It may be substituted with a known substituent.
- i and j represent integers.
- Cy 1 is a nitrogen atom (N atom) coordinated to a rhenium (R e) atom, and two carbon atoms (C atoms bonded to the N atom and shared with Cy 2 ) Atom) and a cyclic structure containing:
- Cy 2 binds to an oxygen atom (O atom) bonded to a rhenium (R e) atom and includes the two C atoms shared with Cy 1 ring Represents a state-like structure.
- the cyclic structure represented by Cy 1 or Cy 2 is not particularly limited and may be appropriately selected depending on the intended purpose. Examples thereof include a 5-membered ring and a 6-membered ring. Contains carbon atom, nitrogen atom, oxygen atom, sulfur atom, etc.
- n includes C y 1 and Cy 2, and coordinated rhenium (R e) atoms in the bidentate coordinating the one ligand of rhenium (R e) atoms Represents one of the coordination numbers 1-3.
- the one ligands may be the same or different.
- L represents the other ligand that saturates the coordination number of the rhenium (R e) atom and keeps the charge of the entire complex neutral.
- the other ligand is not particularly limited as long as the coordination number of the rhenium (R e) atom can be saturated and the charge of the whole organic rhenium complex can be kept neutral, and is appropriately selected according to the purpose.
- Preferable examples include a group selected from a phosphorus group, a cyclometalate 'ligand group, and a triphenylphosphine group. These may be further substituted with known substituents and the like.
- Ar represents an aromatic ring or an aromatic heterocyclic ring, and these may be further substituted with a substituent.
- m represents an integer of 0 to 4, and in the organic rhenium complex, a number such that the reuium (R e ) atom is in the 6-coordination number, which is the stable coordination number. It is preferable from the viewpoint of stability, that is, when n is 1, it is preferably 4, when n is 2, it is preferably 2, and when n is 3, it is 0. preferable.
- — L m structural formula (2)
- R 3 and R 4 are the same as R 1 and R 2 in the structural formula (1). Further, i and j, n, and L and ⁇ are the same as those in the structural formula (1).
- Cy 3 represents a cyclic structure including a nitrogen atom (N atom) coordinated to a rhenium (R e) atom, and a carbon atom bonded to the N atom and bonded to a C atom in Cy 4 .
- Cy 4 represents a cyclic structure including a carbon atom bonded to an oxygen atom (O atom) bonded to a rhenium (Re) atom and a C atom bonded to a carbon atom in Cy 3 .
- the cyclic structure represented by Cy 3 or Cy 4 is not particularly limited and can be appropriately selected depending on the purpose.
- a 5-membered ring, a 6-membered ring, and the like are preferably mentioned.
- R 1 to R 4 may be the same as each other or different, represent a hydrogen atom or a substituent, R 1 ⁇ in the structural formula (1) is the same as that of R 2.
- i, j, k and 1 represent integers, and are the same as i and j in the structural formula (1).
- Cy 1 represents a cyclic structure including a nitrogen atom (N atom) coordinated with a rhenium (R e) atom and two C atoms bonded to the N atom and shared with Cy 2. Same as Cy 1 in Formula (1).
- Cy 2 represents a cyclic structure containing the two C atoms that are bonded to an oxygen atom (O atom) that is bonded to a rhenium (R e) atom and that is shared with Cy 1 , It is the same as Cy 2 in the formula (1).
- Cy 3 represents a cyclic structure containing a nitrogen atom (N atom) coordinated to a rhenium (R e) atom, and a carbon atom bonded to the N atom and bonded to a C atom in Cy 4 , It is the same as Cy 3 in equation (2).
- Cy 4 binds to an oxygen atom (O atom) that is bonded to a rhenium (R e) atom.
- O atom oxygen atom
- R e rhenium
- L represents the other ligand that saturates the coordination of the rhenium (R e) atom and keeps the charge of the entire organic rhenium complex neutral, and is the same as L in the structural formula (1). .
- n 1-2.
- R 5 ⁇ 1 ° may be the same as each other or different, represent a hydrogen atom or a substituent.
- the substituent is the same as that in the structural formula (1).
- n represents the number of ligands.
- L represents the other ligand that saturates the coordination number of the rhenium (Re) atom and keeps the charge of the entire organic rhenium complex neutral.
- m represents an integer of 0 to 4.
- the first organic rhenium complex one represented by any of the following structural formulas (5) to (7) is also preferable.
- the method for producing the first organorhenium complex is not particularly limited and can be appropriately selected from known methods according to the purpose.
- Inorg. Chem. 1993, 1, 32, 398- Preferable examples include the method described in 401.
- R e (CO) 4 (8- quinolinate) and R e (CO) 5 C 1 and 8- quinolinate in toluene, stirred until the evolution of HC 1 gas stops, reacted by refluxing .
- the toluene is evaporated down, concentrated, decyl ether is added and the mixture is allowed to cool.
- the deposited yellow precipitate is filtered and washed with getyl ether.
- the desired Re (CO) 4 (8-quinolinate) can be synthesized by recrystallization twice using a mixed solvent of acetone and Z-diethyl ether.
- the number of the one ligand is two when R e (CO) 5 CI is used, and three when R e Cl 3 is used. can do.
- First and second organometallic complexes organorhenium complexes
- the second organic complex complex (organorhenium complex) has a rhenium (R e) atom, a nitrogen atom and a carbon atom coordinated to the rhenium (R e) atom, and has at least a ⁇ -conjugated moiety.
- One of the ligands and the rhenium (R e) atom saturate the coordination number of the rhenium (R e) atom, and keep the charge of the whole organic rhenium complex neutral
- There is no particular limitation as long as it has another ligand to coordinate as described above, and it can be selected according to the purpose.
- the one ligand and the rhenium (R e ) It is preferable that the electron orbit overlaps with the atom and electrons can be exchanged with each other.
- the one ligand has at least two ring structures, and one of the ring structures has a nitrogen atom coordinated with the rhenium (R e) atom, and the other has a ring structure. It is preferable that one ring structure has a carbon atom coordinated to the rhenium (R e) atom, and further, the one ring structure and the other ring structure are a 5-membered ring and a 6-membered ring.
- ° Preferred specific examples of the second organic rhenium complex include those represented by the following structural formula (8).
- R 1 and R 2 may be the same or different, and represent a hydrogen atom or a substituent.
- the substituent is not particularly limited and may be appropriately selected depending on the intended purpose. Examples thereof include a halogen atom, an alkoxy group, an amino group, an alkyl group, a cycloalkyl group, a nitrogen atom and a sulfur atom. Represents an aryl group which may be substituted, or an aryloxy group which may contain a nitrogen atom or a sulfur atom, and these may be further substituted.
- R 1 and R 2 may be bonded to each other adjacent to each other to form an aromatic ring which may contain a nitrogen atom, a sulfur atom or an oxygen atom. Further, it may be substituted with a known substituent.
- i and j represent integers.
- Cy 1 is a nitrogen atom (N atom) coordinated to a rhenium (Re) atom, and a carbon atom (C atom) bonded to the N atom and bonded to a C atom in Cy 2 .
- Cy 2 is a carbon atom (C atom) bonded to a rhenium (Re) atom, and a carbon atom (C atom bonded to the C atom and bonded to a C atom in Cy 1 ). C atom) and other cyclic structures.
- the cyclic structure represented by Cy 1 or Cy 2 is not particularly limited and can be appropriately selected depending on the purpose.
- a 5-membered ring, a 6-membered ring, and the like are preferably mentioned. It contains carbon atom, nitrogen atom, oxygen atom, sulfur atom, etc.
- n is a ligand containing Cy 1 and Cy 2 and coordinated to the rhenium (R e) atom of the one ligand bidentately coordinated to the rhenium (R e) atom. Represents one of the orders 1-3.
- the one ligands may be the same or different.
- L represents the other ligand that saturates the coordination number of the rhenium (R e) atom and keeps the charge of the entire organic renium complex neutral.
- the other ligand is not particularly limited as long as the coordination number of the rhenium (R e) atom can be saturated and the charge of the whole organic rhenium complex can be kept neutral, and is appropriately selected according to the purpose.
- Preferable examples include a group selected from a cyclometalate ligand group and a triphenylphosphine group. These may be further substituted with a known substituent or the like.
- Ar represents an aromatic ring or an aromatic heterocyclic ring, which may be further substituted with a substituent.
- m represents an integer of 0 to 4, and From the viewpoint of stability, it is preferable to select a number such that the rhenium (R e ) atom has six stable coordination numbers.
- organorhenium complexes represented by the structural formula (8) those represented by the following structural formula (9), wherein the one ligand includes a 7,8-benzoquinoline skeleton; Wherein the one ligand has a 2-phenylpyridine skeleton, and is represented by the following structural formula (11), wherein the one ligand is a 2-phenyloxazoline skeleton Wherein the one represented by the following structural formula (12), wherein the one ligand includes a 2-phenylthiozoline skeleton; the one represented by the following structural formula (13); Is a compound having a 2- (2,1chenyl) pyridine skeleton, represented by the following structural formula (14), wherein the one ligand has a 2- (2′-chenyl) thiozoline skeleton; Wherein the one ligand contains a 3- (2,1-thiozolyl) -12H-pyran-12-one skeleton, the following structure Represented by (1 6) R e (CO ) 4 (7, 8), 8
- R 3 to 1 in the structural formula (9). May be the same as or different from each other, and represent a hydrogen atom or a substituent, and may be further substituted with a substituent. May form an aromatic ring containing any of a nitrogen atom, a sulfur atom and an oxygen atom.
- n represents an integer of 1 to 3.
- L represents the other ligand that saturates the coordination number of the rhenium (R e) atom and keeps the charge of the organic complex as a whole neutral.
- m represents an integer of 0 to 4.
- R 3 to 1 ° may be the same as or different from each other, represent a hydrogen atom or a substituent, and may be further substituted with a substituent. And among them, adjacent ones are connected to each other to form a nitrogen atom
- n represents an integer of 1 to 3.
- L represents the other ligand that saturates the coordination number of the rhenium (Re) atom and keeps the charge of the entire organic rhenium complex neutral.
- m represents an integer of 0 to 4.
- R 3 to R 8 may be the same as or different from each other, and represent a hydrogen atom or a substituent, and may be further substituted with a substituent. Also, adjacent ones of these may be connected to each other to form an aromatic ring containing any of a nitrogen atom, a sulfur atom and an oxygen atom.
- n represents an integer of 1 to 3.
- L represents the other ligand that saturates the coordination number of the rhenium (Re) atom and keeps the charge of the entire organic dimethyl complex neutral.
- m represents an integer of 0 to 4. The details of the substituent, n and m are the same as those in the structural formula (8).
- R 3 to R 8 may be the same as or different from each other, represent a hydrogen atom or a substituent, and may be further substituted with a substituent. In addition, adjacent ones of these may be connected to each other to form an aromatic ring containing any of a nitrogen atom, a sulfur atom and an oxygen atom.
- n represents an integer of 1 to 3.
- L represents the other ligand that saturates the coordination number of the rhenium (R e) atom and keeps the charge of the organic complex as a whole neutral.
- m represents an integer of 0 to 4.
- R 3 to R 8 may be the same as or different from each other, represent a hydrogen atom or a substituent, and may be further substituted with a substituent. In addition, adjacent ones of these may be connected to each other to form an aromatic ring containing any of a nitrogen atom, a sulfur atom and an oxygen atom.
- n represents an integer of 1 to 3.
- L saturates the coordination number of the rhenium (R e) atom, This represents the other ligand that keeps the charge of the whole yuan complex neutral.
- m represents an integer of 0 to 4.
- R 3 to R 6 may be the same as or different from each other, represent a hydrogen atom or a substituent, and may be further substituted with a substituent. In addition, adjacent ones of these may be connected to each other to form an aromatic ring containing any of a nitrogen atom, a sulfur atom and an oxygen atom.
- n represents an integer of 1 to 3.
- L represents the other ligand that saturates the coordination number of the rhenium (R e) atom and keeps the charge of the organic complex as a whole neutral.
- m represents an integer of 0 to 4.
- R 3 to R 6 may be the same as or different from each other, and represent a hydrogen atom or a substituent, and may be further substituted with a substituent. Also, adjacent ones of these may be connected to each other to form an aromatic ring containing any of a nitrogen atom, a sulfur atom and an oxygen atom.
- n is 1-3 Represents an integer.
- L represents the other ligand that saturates the coordination number of the rhenium (R e) atom and keeps the charge of the organic complex as a whole neutral.
- m represents an integer of 0 to 4.
- the method for producing the second organorhenium complex is not particularly limited and can be appropriately selected from known methods depending on the purpose.
- Inorg. Chem. 1993, 32, 5633-5636 The methods described above are preferably exemplified.
- R e (CO) 4 (7,8-benzoquinoline) R e (CO) 5 CI and 7,8-benzoquinoline are stirred for several hours in toluene degassed with nitrogen gas. The reaction is carried out under reflux.
- the number of the one ligand are two in the case of using R e (CO) 5 C 1 , 3 one in the case of the use of R e C l 3
- R e C l 3 can be First and third organometallic complexes
- the third organometallic complex includes at least one group 8 metal atom selected from group 8 metal elements, and at least one ⁇ -conjugated moiety, and one group coordinated to the group 8 metal atom.
- group 8 metal elements selected from group 8 metal elements, and at least one ⁇ -conjugated moiety, and one group coordinated to the group 8 metal atom.
- a ligand and a dithiolate ligand selected from an aliphatic dithiolate ligand and a heteroaromatic dithiolate ligand and coordinated to the Group 8 metal atom.
- the one ligand has at least two ring structures, and one of the ring structures has a nitrogen atom coordinated to the group 8 metal atom, and the other has a ring structure. It is preferable that one of the ring structures has a nitrogen atom coordinated to the group 8 metal atom, and the one ring structure and the other ring structure have a 5-membered ring and a 6-membered ring.
- the structure in which carbon atoms in the one ring structure and the other one ring structure are bonded to each other, or the one ring structure and the other one ring structure are 5
- a structure in which the ring structure is any of a six-membered ring and a six-membered ring, and each ring structure is connected by a third ring structure is particularly preferable.
- the other ligand includes two sulfur atoms, and the two sulfur atoms are dithiolate ligands capable of coordinating to the group 8 metal atom.
- the other ligand is selected from an aliphatic dithiolate ligand and a heteroaromatic dithiolate ligand.
- those represented by the following structural formula (17) are preferable, and among them, those represented by the following structural formula (18) or (19) are preferable. More preferred.
- M represents a Group 8 metal atom.
- L represents the one ligand bonded to the group VIII metal atom M at any of monodentate and bidentate or more, and having at least one ⁇ -conjugated moiety.
- ⁇ represents an integer of 1 to 4.
- R 1 represents a divalent aliphatic organic group or a divalent heteroaromatic organic group.
- the group 8 metal atom is a metal that is extremely stable to oxygen, water, acid, and alkali.
- the organometallic complex contains at least one group 8 metal element.
- L is the one ligand bonded to M so as to satisfy the stable coordination number of M, and has at least one ⁇ -conjugated moiety. Since the stable coordination number of ⁇ is 4 to 8, the L is preferably selected such that the stable coordination number is 4 to 8.
- the ⁇ represents the number of L, and 1 to Represents an integer of 6.
- L is not particularly limited and may be appropriately selected depending on the intended purpose.
- an atom capable of coordinating a monodentate or bidentate or more bond with the Group 8 metal atom is aromatic. Those which are contained in a part of the aromatic ring are preferably exemplified.
- the atoms are preferably selected from, for example, nitrogen, oxygen, chalcogen (sulfur, selenium, tellurium, polonium) and phosphorus.
- those having a 1 to 5 membered aromatic ring containing a nitrogen atom are preferable.
- pyridine, quinoline, 2,2,1-biviridine, phenanthroline, 2,2′-bipyrazine, 2, 2, 1-biquinoline, pyrimidine, pyrimidazole, derivatives thereof, and the like are preferable.
- pyridine, quinoline, 2,2,1-biviridine, phenanthroline, 2,2, -bipyrazine, 2,2, -biquinoline represented by the following structural formula are more preferable.
- R 2 represents one or more substituents bonded to any position of the cyclic structure, for example, a halogen atom, a cyano group, an alkoxy group, an amino group, an alkyl group, Represents an alkyl acetate group, a cycloalkyl group, an aryl group or an aryloxy group, which may be substituted with a substituent.
- R 2 may be the same as or different from each other, and are bonded to each other at any adjacent substitution position to form a nitrogen atom, a sulfur atom, or an oxygen atom. It may form an aromatic ring which may contain atoms, and these may be substituted with a substituent.
- M represents a Group 8 metal atom.
- the ligand which binds to M and contains a nitrogen atom represents a ligand having at least one ⁇ -conjugated moiety, and is coordinated to ⁇ by any one of monodentate and didentate.
- R 3 is a hydrogen atom, a halogen atom, a cyano group, an alkoxy group, an amino group, an alkyl group, an alkyl acetate group, a cycloalkyl group, a nitrogen atom, a Represents a reel group or an aryloxy group, which may be substituted with a substituent, and q represents an integer of 0 to 8. n represents an integer of 1 to 4.
- the ligand bonded to M and containing a sulfur atom represents a dithiolate ligand selected from an aliphatic dithiolate ligand and a heteroaromatic dithiolate ligand.
- R 1 is a divalent aliphatic organic group or a divalent heteroaromatic organic group. Represents a group
- R 1 and R 2 may be the same or different, and represent a hydrogen atom or a substituent.
- Cy 1 represents one cyclic structure including an N atom coordinated with a platinum (Pt) atom and a C atom bonded to the N atom and bonded to a C atom in Cy 2 .
- Cy 2 is a C atom bonded to a platinum (Pt) atom Represents a child, the other cyclic structure containing a C atom bonded to the C atom at the binding vital C y 1 and the C atom.
- the ligand bonded to Pt and containing a sulfur atom represents a dithiolate ligand selected from an aliphatic dithiolate ligand and a heteroaromatic dithiolate ligand.
- R 3 represents a divalent aliphatic organic group or a divalent heteroaromatic organic group.
- the heteroaromatic dithiolate ligand those represented by any of the following structural formulas (20) to (23) are preferable.
- R 4 represents a halogen atom, a cyano group, an alkoxy group, an amino group, an alkyl group, an alkyl acetate group, a cycloalkyl group, a nitrogen atom, an aryl group or an aryloxy group. And these may be substituted with a substituent.
- m represents an integer of 0 to 5.
- the heteroaromatic dithiolate ligand is preferably represented by any one of the following structural formulas (24) to (25).
- R 5 and R 6 may be the same or different from each other, and include a hydrogen atom, a halogen atom, a cyano group, an alkoxy group, and an amino group.
- the third organometallic complex is not particularly limited and may be appropriately selected depending on the purpose. For example, those represented by any of the following structural formulas (26) and (27) are preferable.
- M represents a Group 8 metal atom.
- the ligand which binds to M and contains a nitrogen atom represents a ligand having at least one ⁇ -conjugated moiety, and binds to ⁇ in a monodentate or bidentate or more.
- R 3 is a hydrogen atom, a halogen atom, a cyano group, an alkoxy group, an amino group, an alkyl group, an alkyl acetate group, a cycloalkyl group, a nitrogen atom, or an aryl group.
- the ligand bonded to M and containing a sulfur atom represents an aliphatic dithiolate ligand.
- R 5 and R 6 may be the same or different from each other, and include a hydrogen atom, a halogen atom, a cyano group, an alkoxy group, an amino group, an alkyl group, and an alkyl group. Represents an acetate group, a cycloalkyl group, a nitrogen atom, an aryl group or an aryloxy group, which may be substituted with a substituent.
- M represents a Group 8 metal atom.
- R 7 are the same as each other Hydrogen, halogen, cyano, alkoxy, amino, alkyl, alkylacetate, cycloalkyl, nitrogen, aryl, or aryloxy. May be substituted with a substituent.
- r represents an integer of 0 to 5.
- organometallic complex those represented by any of the following structural formulas (28) to (36) are also preferable.
- any of the following structural formulas (37) to (45) also preferably represented by c
- Structural formula (45) As the organometallic complex, those represented by any of the following structural formulas (46) to (53) are also preferable.
- Structural formula (52) Structural formula (53) Further, the organometallic complex is represented by the following structural formula (54) or (55). Are also preferred.
- t-Bu represents a tert-butyl group.
- Me represents a methyl group.
- the method for producing the third organometallic complex of the present invention is not particularly limited and may be appropriately selected from known methods according to the purpose. Examples thereof include Pt (4,7-dipheninolate 1). , 10-Phenan-mouthed phosphorus; dpphen) (1- (ethoxycalponyl) -11-cyanoethylene-12,21-dithiolate; ecda) can be synthesized as follows.
- reaction scheme Add potassium iodide to the dioxane and dissolve in the dioxane with stirring at a temperature of 15-20 ° C. Ethyl cyanoacetic acid and carbon disulfide were slowly added to this solution. Stir for about 20 minutes after addition, and dilute with ether to form a yellow precipitate.
- the obtained organometallic complex is washed with acetone, ethanol, and getyl ether, dried in vacuo, and the desired organometallic complex: Pt (4,7-diphenyl-1,10-phenanthroline; dpphen) ) Synthesize (1- (ethoxycarbonyl) -1-cyanoethylene-1,2,2-dithiolate; ecda).
- Pt (diimine) (dithiolate) can be synthesized as follows.
- any one of the first to third organometallic complexes of the present invention is used as a light-emitting material in a light-emitting layer or the like of an organic EL device or the like, high-luminance and high-purity red light emission can be obtained. Further, when any one of the first to third organometallic complexes of the present invention is used as a color conversion material in a color conversion layer in an organic EL device or the like, for example, blue light emission in a light emitting layer is changed from green light emission to red light emission. This makes it possible to design a full-color display with high performance and high durability.
- the first organic EL device of the present invention has an organic thin film layer between a positive electrode and a negative electrode, and the organic thin film layer contains at least one of the first to third organometallic complexes as a light emitting material. As well as other layers such as a color conversion layer.
- the second organic EL device of the present invention has a color conversion layer, and the color conversion layer contains any one of the first to third organometallic complexes as a color conversion material.
- the organic metal complex when using at least one of the first to third organic metal complexes of the present invention as a light emitting material, the organic metal complex is contained in the organic thin film layer. It may be contained in the light emitting layer in the organic thin film layer, or may be contained in the light emitting layer / electron transport layer, the light emitting layer / hole transport layer, and the like.
- the organometallic complex when used for the light emitting layer or the color conversion layer, the light emitting layer or the color conversion layer may be formed by using the organometallic complex alone, or may be formed by other than the organometallic complex.
- a host material or the like may be used in combination.
- the organometallic complex when used as a light-emitting material, the light-emitting layer, the light-emitting layer and electron transport layer, the light-emitting layer and hole transport layer in the organic thin film layer,
- the organic metal complex of the present invention may be contained as a material, and in addition to the guest material, a host material having a light emission wavelength near the light absorption wavelength of the guest material may be further contained.
- the host material is preferably contained in the light emitting layer, but may be contained in a hole transport layer, an electron transport layer, or the like.
- the host material When the guest material and the host material are used in combination, when the organic EL emission occurs, the host material is first excited. Then, since the emission wavelength of the host material and the absorption wavelength of the guest material (the organometallic complex) overlap, the excitation energy is efficiently transferred from the host material to the guest material. Since the host material returns to the ground state without emitting light, and only the guest material in the excited state emits excitation energy as light, the host material is excellent in luminous efficiency, color purity, and the like.
- the light-emitting molecules when light-emitting molecules are present alone or in a high concentration in a thin film, the light-emitting molecules approach each other to cause an interaction between the light-emitting molecules, resulting in a phenomenon called “concentration quenching” that lowers the light emission efficiency.
- concentration quenching occurs because the organometallic complex as the guest compound is dispersed at a relatively low concentration in the host compound. Is effectively suppressed and the light emission efficiency is excellent.
- the host material when the guest material and the host material are used in combination in the light emitting layer, the host material generally has excellent film forming properties, so that the light emitting properties are maintained and the film forming properties are excellent. It is advantageous.
- the host material is not particularly limited and may be appropriately selected depending on the purpose. However, a material having an emission wavelength near the light absorption wavelength of the guest material is preferable.
- a material having an emission wavelength near the light absorption wavelength of the guest material is preferable.
- n an integer of 2 or 3.
- Ar represents a divalent or trivalent aromatic group or a heterocyclic aromatic group.
- R 16 and R 17 may be the same or different, and represent a monovalent aromatic group or a heterocyclic aromatic group.
- the monovalent aromatic group or heterocyclic aromatic group is not particularly limited and may be appropriately selected depending on the intended purpose.
- N, N, dinaphthyl-N, N′-diphenyl-2- [1,1, -biphenyl] represented by the following structural formula (57) 4,4, Diamine (NPD) (main emission wavelength 430 nm) and its derivatives are preferred.
- Ar represents a divalent or trivalent group containing an aromatic ring or a divalent or trivalent group containing a heterocyclic aromatic ring shown below.
- R represents a linking group
- R 18 and R 19 each independently represent a hydrogen atom, a halogen atom, an alkyl group, an aralkyl group, an alkenyl group, an aryl group, a cyano group, an amino group, an acyl group, Alkoxy group, carboxy group, alkoxy group, alkylsulfonyl group, hydroxyl group, amide group, aryloxy group, aromatic carbonization Represents a hydrogen ring group or an aromatic bicyclic ring group, which may be further substituted with a substituent.
- n an integer, preferably 2 or 3.
- Ar force is an aromatic group in which two benzene rings are connected via a single bond, and R 18 and R 19 are hydrogen atoms.
- R 2 1 ⁇ R 2 4 which may be different stone I be the same as each other, represent a hydrogen atom or a substituent.
- Preferred examples of the substituent include an alkyl group, a cycloalkyl group and an aryl group, which may be further substituted with a substituent.
- R 2 1 represented by the structural formula (6 2), 3, 6, among 8 Tetorafue two Rubiren, R 2 1 to R 2 4 is a hydrogen atom, i.e., by the following structural formula (6 3) 1,3,6,8-Tetraphenylene (main emission wavelength 440 nm) 1S It is preferable because it has particularly excellent luminous efficiency.
- the content of the organometallic complex in the layer containing the organometallic complex is preferably from 0.1 to 50% by mass, and more preferably from 0.5 to 20% by mass.
- the content is less than 0.1% by mass, the life, luminous efficiency, etc. may not be sufficient, and the content is 50% by mass. If it exceeds / 0 , the color purity may be reduced. On the other hand, if it is more preferable than the above range, it is preferable in terms of excellent life, luminous efficiency and the like.
- the light emitting layer in the organic EL device of the present invention is capable of injecting holes from the positive electrode, the hole injection layer, the hole transport layer, and the like when an electric field is applied, and the negative electrode, the electron injection layer, and the electron transport.
- An electron can be injected from a layer or the like, further provides a field of recombination between the hole and the electron, and emits light by the recombination energy generated at the time of the recombination.
- a light-emitting molecule as long as it has a function of emitting light, and may contain other light-emitting materials in addition to the organometallic complex within a range that does not impair the light emission.
- the light emitting layer can be formed according to a known method.
- the light emitting layer include a vapor deposition method, a wet film formation method, a MBE (molecular beam epitaxy) method, a cluster ion beam method, a molecular lamination method, a LB method, a printing method, Among these, which can be suitably formed by a transfer method, etc., among these, the vapor deposition method is preferable because it can be easily and efficiently manufactured at low cost without a problem of waste liquid treatment without using an organic solvent.
- the light emitting layer is designed to have a single-layer structure, for example, when the light emitting layer is formed as a hole transporting layer, a light emitting layer, and an electron transporting layer, a wet film forming method is also preferable.
- the vapor deposition method is not particularly limited and may be appropriately selected from known methods according to the purpose. For example, vacuum deposition, resistance heating deposition, chemical vapor deposition, physical vapor deposition, and the like can be selected. Examples of the chemical vapor deposition include plasma CVD, laser CVD, and thermal CVD. Method, gas source CVD method and the like.
- the formation of the light-emitting layer by the vapor deposition method may be performed, for example, by vacuum-depositing the organometallic complex, and when the light-emitting layer contains the host material in addition to the organometallic complex, This can be suitably performed by co-evaporating the host material by vacuum evaporation.
- the former case is easy to manufacture because no co-evaporation is required.
- the wet film forming method is not particularly limited and may be appropriately selected from known methods according to the purpose. Examples thereof include an ink jet method, a spin coat method, a der coat method, a bar coat method, and a blade coat method. , A casting method, a dip method, a curtain coating method and the like.
- a solution in which the material of the light emitting layer is dissolved or dispersed together with a resin component can be used (applied or the like).
- the resin component include polybutylcarbazole, polycarbonate, and polychlorinated resin. Bull, polystyrene, polymethyl methacrylate, polyester, polysulfone, polyphenylene oxide, polybutadiene, hydrocarbon resin, ketone resin, phenoxy resin, polyamide, ethyl cellulose, vinyl acetate, ABS resin, polyurethane, melamine resin, unsaturated polyester resin , Alkyd resins, epoxy resins, silicone resins, and the like.
- the formation of the light emitting layer by the wet film forming method is performed, for example, by using a solution (coating solution) of the organometallic complex and the resin material used as necessary in a solvent (coating and drying).
- a solution (coating solution) is dissolved in a solvent obtained by dissolving the organometallic complex, the host material, and, if necessary, the resin material in a solvent.
- the thickness of the light emitting layer is preferably from 1 to 50 nm, more preferably from 3 to 20 ⁇ .
- the thickness of the organic EL element When the thickness of the light emitting layer is within the preferable numerical range, the thickness of the organic EL element It is advantageous in that the luminous efficiency of the emitted light, the luminous brightness, and the color purity are sufficient, and when the luminous efficiency is within the more preferable numerical range, the luminous efficiency is remarkable.
- the organic EL device of the present invention has an organic thin film layer including a light emitting layer between a positive electrode and a negative electrode, and may have another layer such as a protective layer according to the purpose.
- the organic thin film layer has at least the light emitting layer, and may further have a hole injection layer, a hole transport layer, a hole blocking layer, an electron transport layer, and the like, if necessary.
- the positive electrode is not particularly limited and may be appropriately selected depending on the intended purpose. However, the positive electrode may be appropriately selected from the organic thin film layer, and more specifically, when the organic thin film layer has only the light emitting layer. When the organic thin film layer further has the hole transport layer, the hole transport layer; and when the organic thin film layer further has the hole injection layer, the hole injection layer has: (Carrier) can be supplied.
- the material of the positive electrode is not particularly limited and may be appropriately selected depending on the intended purpose. Examples thereof include metals, alloys, metal oxides, electrically conductive compounds, and mixtures thereof. Among them, a material having a work function of 4 eV or more is preferable.
- Specific examples of the material of the positive electrode include conductive metal oxides such as tin oxide, zinc oxide, indium oxide, and indium tin oxide (ITO); metals such as gold, silver, chromium, and nickel; Mixtures or laminates with conductive metal oxides; inorganic conductive substances such as copper iodide and copper sulfide; organic conductive materials such as polyaniline, polythiophene, and polypyrrole; and laminates of these with ITO, etc. . These may be used alone or in combination of two or more. Among these, conductive metal oxides are preferable, and ITO is particularly preferable from the viewpoints of productivity, high conductivity, transparency, and the like.
- the thickness of the positive electrode is not particularly limited and may be appropriately selected depending on the material and the like, but is preferably 1 to 500 nm, more preferably 20 to 200 nm.
- the positive electrode is usually formed on a substrate made of glass such as soda lime glass or non-alkali glass, or a transparent resin.
- a substrate made of glass such as soda lime glass or non-alkali glass, or a transparent resin.
- soda lime glass coated with a barrier coat such as the alkali-free glass and silica is preferable from the viewpoint of reducing the ions eluted from the glass.
- the thickness of the substrate is not particularly limited as long as it is a thickness sufficient to maintain mechanical strength, but when glass is used as the base material, it is usually 0.2 mm or more, and 0.7 mm or more. The above is preferred.
- the positive electrode may be formed, for example, by a vapor deposition method, a wet film formation method, an electron beam method, a sputtering method, a reactive sputtering method, an MBE (molecular beam epitaxy) method, a cluster ion beam method, an ion plating method, or a plasma polymerization method (high-frequency excitation ion A coating method of the ITO by a molecular lamination method, a molecular lamination method, a LB method, a printing method, a transfer method, a chemical reaction method (such as a sol-gel method), and the like. it can.
- the positive electrode can be subjected to washing or other treatment to lower the driving voltage of the organic EL element or increase the luminous efficiency.
- the other treatment for example, when the material of the positive electrode is ITO, a UV-ozone treatment, a plasma treatment and the like are preferably exemplified.
- the negative electrode is not particularly limited and may be appropriately selected depending on the intended purpose.
- the negative electrode may be appropriately selected from the organic thin film layer, and specifically, the organic thin film layer may include only the light emitting layer when the organic thin film layer has only the light emitting layer.
- the organic thin film layer further has the electron transport layer, electrons are supplied to the electron transport layer, and when the organic thin film layer has an electron injection layer between the organic thin film layer and the negative electrode, electrons are supplied to the electron injection layer. Those that can do so are preferred.
- the material of the negative electrode is not particularly limited, and can be appropriately selected depending on the adhesion between the layer or the molecule adjacent to the negative electrode such as the electron transport layer and the light emitting layer, ionization potential, stability, and the like. Examples thereof include metals, alloys, metal oxides, electrically conductive compounds, and mixtures thereof.
- the negative electrode material include alkali metals (eg, Li, Na, K, Cs, etc.), alkaline earth metals (eg, Mg, Ca, etc.), gold, silver, lead, aluminum Aluminum, sodium-potassium alloys or their mixed metals, lithium-aluminum alloys or their mixed metals, magnesium-silver alloys or their mixed metals, rare earth metals such as indium, ytterbium, and their alloys. Can be These may be used alone or in combination of two or more. Among these, a material having a work function of 4 eV or less is preferable, and aluminum, a lithium alloy, a mixed metal thereof, a magnesium-silver alloy, a mixed metal thereof, and the like are more preferable.
- the thickness of the negative electrode is not particularly limited and may be appropriately selected depending on the material of the negative electrode and the like, but is preferably 1 to 10, OOOnm, and more preferably 20 to 200 nm.
- the negative electrode may be formed, for example, by a vapor deposition method, a wet film formation method, an electron beam method, a sputtering method, a reactive sputtering method, an MBE (molecular beam epitaxy) method, a cluster beam method, an ion plating method, a plasma polymerization method (high frequency Excited ion plating method), molecular lamination method, LB method, printing method, transfer method, etc., can be suitably formed.
- a vapor deposition method a wet film formation method, an electron beam method, a sputtering method, a reactive sputtering method, an MBE (molecular beam epitaxy) method, a cluster beam method, an ion plating method, a plasma polymerization method (high frequency Excited ion plating method), molecular lamination method, LB method, printing method, transfer method, etc.
- the two or more materials may be simultaneously deposited to form an alloy electrode or the like, or an alloy electrode or the like may be formed by depositing a previously prepared alloy. It may be formed.
- the resistance values of the positive electrode and the negative electrode are preferably low, and are preferably several hundreds ⁇ or less.
- the hole injection layer is not particularly limited and may be appropriately selected depending on the intended purpose.
- the hole injection layer preferably has a function of injecting holes from the positive electrode when an electric field is applied. .
- the material for the hole injection layer is not particularly limited and may be appropriately selected depending on the intended purpose.
- a starburst amine (4,4,4,4, -tris) represented by the following formula can be used. [3-methylphenyl ⁇ phenyl) amino] triphenyamine: m—M ⁇ DATA), copper phthalocyanine, polyaniline, and the like.
- the thickness of the hole injection layer is not particularly limited and may be appropriately selected depending on the intended purpose.
- the thickness is preferably about 1 to 100 nm, and more preferably 5 to 50 nm.
- the hole injection layer may be formed, for example, by a vapor deposition method, a wet film formation method, an electron beam method, a sputtering method, a reactive sputtering method, a MBE (molecular beam epitaxy) method, a cluster T on-beam method, or an ion plating method. It can be suitably formed by the above-mentioned methods such as a plasma polymerization method (high-frequency excitation plating method), a molecular lamination method, an LB method, a printing method, and a transfer method.
- the hole transport layer is not particularly limited and may be appropriately selected depending on the intended purpose. For example, a layer having a function of transporting holes from the positive electrode when an electric field is applied is preferable.
- the material of the hole transport layer is not particularly limited and may be appropriately selected depending on the intended purpose. Examples thereof include an aromatic amine compound, carbazole, imidazole, triazolone, oxazole, oxaziazole, polyarylalkane, and virazoline.
- aromatic amine compounds are preferable.
- TPD N, N, N, N, N, N, N, N, N, N, N, N, N, N, N, N, N, N, N, N, N, N, N, N, N, N, N, N, N, N, N, N, N, N, N, N, N, N, N, N, N, N, N, N, N, N, N, N, N, N, N, N, N, N, N, N, N, N, N, N, N, N, N, N, N, N ⁇ '-dinaphthyl-N, N, diphenyl [1,1,1-biphenyl] -4,4, diamine) and the like are more preferred.
- the thickness of the hole transport layer is not particularly limited and may be appropriately selected depending on the purpose.
- the thickness is usually 1 to 500 nm, and 10 to L 0. 0 nm is preferred.
- the hole transport layer can be formed by, for example, a vapor deposition method, a wet film formation method, an electron beam method, a sputtering method, a reactive sputtering method, a MBE (molecular beam epitaxy) method, a cluster ion beam method, an ion plating method, It can be suitably formed by the above-described methods such as a plasma polymerization method (high frequency excitation plating method), a molecular lamination method, an LB method, a printing method, and a transfer method.
- One hole blocking layer is not particularly limited and may be appropriately selected depending on the purpose.
- the thickness is usually 1 to 500 nm, and 10 to L 0. 0 nm is preferred.
- the hole transport layer can be formed by, for example, a vapor de
- the hole blocking layer is not particularly limited and may be appropriately selected depending on the intended purpose.
- a layer having a function of blocking holes injected from the positive electrode is preferable.
- the material for the hole blocking layer is not particularly limited and can be appropriately selected depending on the purpose.
- the organic EL element When the organic EL element has the hole blocking layer, holes transported from the positive electrode side are blocked by the hole blocking layer, and electrons transported from the negative electrode are transported by the hole blocking layer. To the light-emitting layer after passing through, the recombination of electrons and holes occurs efficiently in the light-emitting layer. Therefore, the recombination of the holes and the electrons in the organic thin film layer other than the light-emitting layer occurs. Bonding can be prevented, and light emission from the organic luminescent complex, which is a desired light emitting material, can be efficiently obtained, which is advantageous in terms of color purity and the like.
- the hole blocking layer is preferably disposed between the light emitting layer and the electron transport layer.
- the thickness of the hole blocking layer is not particularly limited and may be appropriately selected depending on the intended purpose.
- the thickness is usually about 1 to 500 nm, preferably 10 to 50 nm.
- the hole blocking layer may have a single-layer structure or a multilayer structure.
- the hole blocking layer may be formed by, for example, a vapor deposition method, a wet film formation method, an electron beam method, a sputtering method, a reactive sputtering method, a MBE (molecular beam epitaxy) method, a cluster ion beam method, an ion plating method, Plasma polymerization method (high frequency Excitation ion plating method), molecular lamination method, LB method, printing method, transfer method, etc., can be suitably formed by the above-mentioned methods.
- a vapor deposition method a wet film formation method
- an electron beam method a sputtering method, a reactive sputtering method
- MBE mo beam epitaxy
- a cluster ion beam method an ion plating method
- Plasma polymerization method high frequency Excitation ion plating method
- molecular lamination method LB method
- printing method transfer method, etc.
- the electron transport layer is not particularly limited and may be appropriately selected depending on the intended purpose. Examples thereof include a function of transporting electrons from the negative electrode and a function of blocking holes injected from the positive electrode. Are preferred.
- the material of the electron transport layer is not particularly limited and may be appropriately selected depending on the intended purpose. Examples thereof include a quinoline derivative such as the aluminum quinoline complex (A1q), an oxadiazole derivative, a triazole derivative, and phenanthroline. Derivatives, perylene derivatives, pyridine derivatives, pyrimidine derivatives, quinoxaline derivatives, difluoroquinone derivatives, nitro-substituted fluorene derivatives, and the like.
- A1q aluminum quinoline complex
- a triazole derivative phenanthroline
- Derivatives perylene derivatives, pyridine derivatives, pyrimidine derivatives, quinoxaline derivatives, difluoroquinone derivatives, nitro-substituted fluorene derivatives, and the like.
- the material of the electron transport layer is mixed with the material of the light emitting layer to form a film, an electron transport layer and a light emitting layer can be formed. Further,
- the thickness of the electron transport layer is not particularly limited and can be appropriately selected depending on the purpose.
- the thickness is usually about 1 to 500 nm, and preferably 10 to 50 nm.
- the electron transport layer may have a single-layer structure or a multilayer structure.
- an electron transporting material whose light absorption edge has a shorter wavelength than that of the organometallic complex is used as the electron transporting material used for the electron transporting layer adjacent to the light emitting layer. Is limited to the light emitting layer, and is preferable from the viewpoint of preventing unnecessary light emission from the electron transport layer.
- Examples of the electron transporting material having a light absorption edge shorter in wavelength than the organometallic complex include a phenanthone-containing phosphorus derivative, an oxaziazole derivative, and a triazole derivative, and are represented by the following structural formula (68)
- Preferred examples include 2,9-dimethyl-4,7-diphenyl-1,10-phenanthroline (BCP) and the compounds shown below.
- the electron transport layer may be formed, for example, by a vapor deposition method, a wet film formation method, an electron beam method, a sputtering method, a reactive sputtering method, a MBE (molecular beam epitaxy) method, a cluster ion beam method, an ion plating method, or a plasma. It can be suitably formed by the above-mentioned methods such as a polymerization method (a high-frequency excitation plating method), a molecular lamination method, an LB method, a printing method, and a transfer method.
- the organic EL device of the present invention may have other layers appropriately selected according to the purpose.
- the other layers include a color conversion layer and a protective layer.
- the color conversion layer in the case of the second organic EL device of the present invention, the color conversion layer is an essential layer, and the color conversion layer preferably contains a phosphorescent material, More preferably, it contains at least one of the first to third organometallic complexes of the present invention, and particularly preferably contains at least one of the organorhenium complex and the organoplatinum complex. preferable.
- the color conversion layer may be formed only of the organic metal complex, or may be formed to further include another material.
- At least one of the first to third organometallic complexes may be used alone or in combination of two or more.
- an organic molecule excited by light of a certain wavelength emits light from the excited state and transitions to the ground state before being excited by interaction within the molecule or with other molecules. It is known that the excitation and emission wavelengths do not match because some of the energy is lost non-radiatively in the form of thermal energy. The energy difference between the excitation light and the light emission is called the “storage shift”.
- the color conversion material used in the color conversion layer a fluorescent material which emits only light from a singlet due to a wide range of material selection has been used.
- the shift is small (about 100 nm) and the emission is observed immediately on the long wavelength side with respect to the strongest absorption band existing in the visible region, for example, blue-based emission is efficiently absorbed and changed to red-based color. Cannot be replaced.
- at least one of the first to third organometallic complexes of the present invention is a phosphorescent material, when excited by light of a certain wavelength to generate a singlet excited state, the energy is lower than that.
- the transition to the triplet excited state which is a state, is possible, and phosphorescence can be emitted. Therefore, the stokes shift is larger than that of a fluorescent material.
- the triplet state is a singlet excited state.
- the thickness of the color conversion layer without changing the dispersion concentration increases the amount of blue light absorbed and increases the intensity of red light.
- leaching from the color conversion layer when an organic EL device is manufactured It is better to make the color conversion layer as thin as possible because the material constituting the organic EL element is degraded by a substance, for example, a residue of moisture or an organic solvent, and a non-light emitting region is generated.
- the use of a host that absorbs blue light captures the low absorptivity of the guest.
- the dispersion concentration is too low, the light emission is weakened due to the quenching effect of oxygen molecules.
- the effectiveness of using the phosphorescent material in a powder state is that the deterioration of the color conversion layer can be suppressed. Since the color conversion layer is constantly exposed to light during the photolithography process in the substrate manufacturing stage, the IT0 pattern There is a problem that the color conversion efficiency is reduced by the conversion. When a light-emitting material dispersed in a color conversion layer is used, the light-emitting material alone is exposed to light, so its deterioration is very fast, and it is very difficult to prevent it.
- the color conversion layer using a phosphorescent material in a powder state is exposed to light with a barta, so that deterioration can be suppressed, a long life, and a color conversion layer in which the conversion efficiency does not change can be obtained.
- the position where the color conversion layer is provided is not particularly limited and may be appropriately selected depending on the purpose. For example, in the case of performing full-color display, it is preferable to provide the color conversion layer on a pixel.
- the color conversion layer needs to be capable of converting incident light into light having a wavelength of 100 nm or more longer than the wavelength of the light. It is preferable that the incident light can be converted into light having a wavelength longer than the wavelength of the light by 150 nm or more.
- the color conversion layer is incident. It is preferable that the light can be converted to light having a wavelength of at least 100 nm longer than the wavelength of the light, and the incident light is converted to light having a wavelength of at least 150 nm longer than the wavelength of the light. More preferably, it is possible.
- the color conversion layer be capable of converting light in a wavelength range from ultraviolet light to blue light to red light.
- the method for forming the color conversion layer is not particularly limited and can be appropriately selected depending on the intended purpose. Examples thereof include a vapor deposition method and a coating method.
- the color conversion layer is not always essential, and can be provided as necessary.
- the color conversion layer is not particularly limited and may be appropriately selected depending on the intended purpose. It is preferable to form the color conversion layer using at least one of the first to third organometallic complexes of the present invention. However, a known color filter or the like may be used.
- the protective layer is not particularly limited and can be appropriately selected depending on the purpose. For example, molecules or substances such as moisture and oxygen that accelerate the deterioration of the organic EL element enter the organic EL element. What can suppress that is preferable.
- the material of the protective layer for example, I n, S n, P b, Au, Cu, Ag, A 1, T i, metals such as N i, MgO, S i O , S i 0 2, A 1 2 0 3, Ge O, N i 0, C a 0, B A_ ⁇ , F e 2 0 3, Y 2 0 3, T i 0 metal oxides such as 2, S i N, S i N x 0 y nitrides etc., Mg F 2, L i F , a 1 F 3, C a F 2 or the like of metal off Tsu fluoride, polyethylene, polypropylene, polymethyl methacrylate, polyimide, polyurea, polytetrafluoroethylene unloading Reo Russia ethylene, poly Copolymerization of a monomer mixture containing tetrachlorophenol and at least one comonomer, a copolymer of chlorotriphenol and ethylene, a copolymer of chlor
- Copolymer obtained by the reaction a fluorinated copolymer having a cyclic structure in the main chain of the copolymer, a water absorption of 1%
- a fluorinated copolymer having a cyclic structure in the main chain of the copolymer a fluorinated copolymer having a cyclic structure in the main chain of the copolymer, a water absorption of 1%
- moisture-proof substances having a water absorption of 0.1% or less, and the like are included.
- the protective layer may be formed, for example, by a vapor deposition method, a wet film formation method, a sputtering method, a reactive sputtering method, an MBE (molecular beam epitaxy) method, a cluster ion beam method, an ion plating method, or a plasma polymerization method (high-frequency excitation ion plating).
- the structure of the organic EL device of the present invention is not particularly limited and may be appropriately selected depending on the purpose.
- Examples of the layer structure include the following layer structures (1) to (13), (1) positive electrode / hole injection layer / hole transport layer / emission layer electron transport layer / electron injection layer Z negative electrode; (2) positive electrode Z hole injection layer Z hole transport layer Z emission layer electron transport layer / Negative electrode, (3) Positive electrode / Hole transport layer Z light emitting layer Z electron transport layer / electron injection layer / negative electrode, (4) positive electrode hole transport layer / light emitting layer / electron transport layer / negative electrode, (5) positive electrode (6) Positive electrode / hole injection layer Z hole transport layer Z light emitting layer / electron transport layer Z negative electrode, (7) hole injection layer / hole transport layer / emission layer / electron transport layer (8) Positive electrode / Hole transport layer / Electron transport layer / Negative electrode, (9) Positive electrode / Hole injection layer / Positive electrode Hole transport layer and light emitting layer / electron transport layer / electron injection layer / negative electrode, (1 0) Positive electrode / hole injection layer / hole transport layer / light emitting layer Z electron transport layer
- the organic EL device has the hole blocking layer
- the above ( In 1) to (13) a layer configuration in which the hole blocking layer is disposed between the light emitting layer and the electron transport layer is preferably exemplified.
- FIG. 1 illustrates the (4) embodiment of the positive electrode Z hole transport layer / light emitting layer / electron transport layer / negative electrode.
- the organic EL element 10 is formed on a glass substrate 12.
- the formed positive electrode 14 for example, an ITO electrode
- a hole transport layer 16 a light-emitting layer 18, an electron transport layer 20, and a negative electrode 22 (for example, an A1-Li electrode) are laminated in this order. It has a layer configuration.
- the positive electrode 14 (for example, an ITO electrode) and the negative electrode 22 (for example, an A1-Li electrode) are connected to each other via a power supply.
- the organic EL device of the present invention in which the organic thin film layer 24 for red light emission is formed by the hole transport layer 16, the light emitting layer 18, and the electron transport layer 20, preferably has a light emission peak wavelength of 600 to 650 nm.
- the organic EL device of the present invention emits red light at a voltage of 10 V or less, emits red light at 7 V or less, and more preferably emits red light at 5 V or less.
- the emission luminance of the organic EL device of the present invention at an applied voltage of 10 V is preferably 100 cd / m 2 or more, more preferably 500 cd / m 2 or more, and 1,000 cd / m 2 or more. The above is particularly preferred.
- the organic EL device of the present invention may be, for example, a lighting device, a computer, an in-vehicle display, an outdoor display, a household device, a business device, a home appliance, a traffic display device, a clock display device, a calendar display device, a luminance display device.
- a lighting device a computer, an in-vehicle display, an outdoor display, a household device, a business device, a home appliance, a traffic display device, a clock display device, a calendar display device, a luminance display device.
- the organic EL display of the present invention is not particularly limited except that the organic EL element of the present invention is used, and a known configuration can be appropriately adopted.
- the organic EL display may be of a single color emission type, of a multicolor emission type, or of a color type.
- a method for making the organic EL display a full-color type for example, as described in “Monthly Display”, September 2000, pages 33 to 37, three primary colors ( An organic EL element that emits light corresponding to blue (B), green (G), and red (R)) is arranged on a substrate.
- a color conversion method for converting blue light emitted by an organic EL element for blue light emission into red (R) and green (G) through a fluorescent dye layer.
- the organic EL element of the present invention used is for red light emission, a three-color light emission method, a color conversion method, and the like can be suitably employed.
- the color conversion method can be particularly preferably employed.
- the organic EL display for example, as shown in FIG. 8, this organic EL display has an organic thin film layer 30 for emitting blue light on an electrode 25 arranged corresponding to a pixel. And a transparent electrode 20 thereon. Then, on the transparent electrode 20, through a protective layer (planarizing layer) 15, a laminate of the color conversion layer 60 for red and the red color filter 65 and the color conversion layer 7 for green 0 and a stack of green color filters 80 are arranged. Then, a glass substrate 10 is provided on these.
- the organic thin film layer 30 for emitting blue light emits blue light.
- a part of this blue light is transmitted through the transparent electrode 20, transmitted through the protective layer 15 and the glass substrate 10 as it is, and emitted to the outside.
- the blue light is converted into red and green in these color conversion layers, respectively.
- the red color filter 65 and the green color filter 80 the light becomes red emission light and green emission light, respectively, and passes through the glass substrate 10. As a result, a full-color display is possible on the organic EL display.
- the color conversion layers 60 and 70 are the organic metal complex (phosphorescent material) of the present invention.
- the organic metal complex is formed by using only the organometallic complex alone without using a host material or the like even in the color conversion layer for red, it is easy to manufacture and extremely Excellent color conversion efficiency.
- FIG. 6 is a diagram showing a structural example of an organic EL display by a three-color light emitting method
- FIG. 7 is a diagram showing a structural example of an organic EL display by a white color method. 6 and 7 have the same reference numerals as those in FIG.
- the organic EL element of the present invention is used for red light emission, and in addition, an organic EL element for green light emission and a blue light-emitting organic EL element are used.
- An organic EL device is required.
- the organic EL device for emitting blue light is not particularly limited and can be appropriately selected from known devices.
- the layer configuration is ITO (positive electrode) / NPD / A 1 -Li ( Negative electrode) and are preferably mentioned.
- the organic EL device for emitting green light is not particularly limited and can be appropriately selected from known devices.
- the layer configuration is ITO (positive electrode) / the NPD and the A1q / A1 — L i (negative electrode), and the like are preferable.
- the mode of the organic EL display is not particularly limited and may be appropriately selected depending on the intended purpose. Examples thereof include, for example, “Nikkei Electronics”, No. 765, March 13, 2000, 55- Preferable examples include a passive matrix panel and an active matrix panel described on page 62.
- the passive matrix panel has, for example, as shown in FIG. 2, a strip-shaped positive electrode 14 (for example, an ITO electrode) arranged in parallel on a glass substrate 12, and sequentially on the positive electrode 14, It has a strip-shaped organic thin film layer 24 for red light emission, an organic thin film layer 26 for blue light emission, and an organic thin film layer 28 for green light emission arranged in parallel and in a direction substantially perpendicular to the positive electrode 14.
- a negative electrode 22 having the same shape as these is provided.
- a positive electrode line 30 composed of a plurality of positive electrodes 14 and a negative electrode line 32 composed of a plurality of negative electrodes 22 are provided. Cross each other in a substantially perpendicular direction to form a circuit.
- the organic thin-film layers 24, 26, and 28 for red, blue, and green light located at each intersection function as pixels, and a plurality of organic EL elements 34 correspond to each pixel.
- the passive matrix panel when a current is applied by a constant current source 36 to one of the positive electrodes 14 on the positive electrode line 30 and one of the negative electrodes 22 on the negative electrode line 32, A current is applied to the organic EL thin film layer located at the intersection, and the organic EL thin film layer at that position emits light. By controlling the light emission of each pixel, a full-color image can be easily formed.
- scanning lines, data lines, and current supply lines are formed on a glass substrate 12 in a grid pattern, and the scanning forming the grid pattern is performed.
- a TFT circuit 40 connected to a line or the like and arranged on each grid, and a positive electrode 14 (for example, an ITO electrode) drivable by the TFT circuit 40 and arranged in each grid.
- a negative electrode 22 is disposed on the organic thin film layer 24 for emitting red light, the organic thin film layer 26 for emitting blue light, and the organic thin film layer 28 for emitting green light.
- the organic thin-film layer 24 for emitting red light, the organic thin-film layer 26 for emitting blue light, and the organic thin-film layer 28 for emitting green light include a hole transport layer 16, a light emitting layer 18 and an electron transport layer 2, respectively. Has zero.
- a plurality of scanning lines 46 provided in parallel, and a plurality of data lines 42 and current supply lines 44 provided in parallel are orthogonal to each other.
- a switching TFT 48 and a driving TFT 50 are connected to form a circuit.
- the switching TFT 48 and the drive TFT 50 can be driven for each grid.
- each of the organic thin-film elements 24, 26, and 28 for blue light emission, green light emission, and red light emission functions as a pixel, and in the active matrix panel, the stripes are arranged in a horizontal direction.
- the organic EL display of the present invention includes, for example, a computer, an in-vehicle display, an outdoor display, a home appliance, a commercial appliance, a household appliance, a traffic display, a clock display, a calendar display, and a luminescent display. It can be suitably used in various fields such as screens and audio equipment.
- a computer an in-vehicle display, an outdoor display, a home appliance, a commercial appliance, a household appliance, a traffic display, a clock display, a calendar display, and a luminescent display. It can be suitably used in various fields such as screens and audio equipment.
- examples of the present invention will be described, but the present invention is not limited to these examples.
- Re (CO) 4 (8-quinolinate) was synthesized from 1 and 8-quinolinate as raw materials. That is, as shown in the following reaction formula, and R e (CO) s CI and 8-Kinorine preparative toluene, stirred until the evolution of HC 1 gas stops, is reacted at reflux. The toluene was evaporated and concentrated, and getyl ether was added and allowed to cool. The deposited yellow precipitate was filtered and washed with getyl ether. Then, the desired Re (CO) 4 (8-quinolinate) was synthesized by recrystallization twice using a mixed solvent of acetone Z and getyl ether.
- Example 1 8-quinolinate was converted to 2- (2,1-pyridyl) phenol.
- Re (CO) 4 (2 (2′-pyridyl) phenol) was synthesized in the same manner as in Example 1 except that the substitution was carried out.
- Example 1 substituting R e (CO) 5 C 1 to R e (CO) 4 C 1 2, a ligand 8- quinolinate, 8-quinolinate and 2- (2, single-pyridyl) Hue Nord Re (CO) 2 (8-quinolinate) (2- (2,1-pyridyl) phenol) was synthesized in the same manner as in Example 1 except that and (1: 1) were used. The obtained crude product was separated by a column. The yield was 10%.
- the I tO electrodes on as a hole-transporting layer N, N, Jifue two Lou N, N, one-bis (3-methyl Phenyl (1,1,1-biphenyl) -4,4,1-diamine) (TPD) was coated to a thickness of 50 nm.
- TPD hole-transporting layer
- the organic renium complex synthesized in each of Examples 1 to 7 was coated and vapor-deposited on the TPD hole transport layer so as to have a thickness of 20 nm to form a light-emitting layer.
- BCP 2,9_dimethyl-4,7-diphenyl-1,10-phenantophosphorus
- BCP 2,9_dimethyl-4,7-diphenyl-1,10-phenantophosphorus
- the organic EL device When a voltage is applied to the ITO electrode (positive electrode) and the A1-Li alloy (negative electrode) in the fabricated organic EL device, the organic EL device emits red light with high color purity at a voltage of 5 V or more. Observed.
- the emission luminance (cd / m 2 ) at an applied voltage of 10 V and the effective half-life of the organic EL device were measured by constant current measurement with the initial luminance set to 100 cd / m 2 .
- Table 1 shows the results.
- the numbers 1 to 4 in Table 1 mean Examples 1 to 4 and indicate that the organic rhenium complex was obtained in each example.
- Example 5 the formation of the light emitting layer using only the organic rhenium complex was performed by combining the organic rhenium complex with the 4,4, -bis (9-force rubazolyl) -biphenyl represented by the structural formula (13).
- CBP was formed in the same manner as in Example 5 except that the organic rhenium complex was formed by simultaneous vapor deposition so as to be 99 molecules (99 mol) per 1 molecule (1 mol) of the organorhenium complex. Seven types of organic EL devices were produced.
- the organic EL element When a voltage is applied to the ITO electrode (positive electrode) and the A1-Li alloy (negative electrode) in the manufactured organic EL element, the organic EL element emits red light with high color purity at a voltage of 5 V or more. Was observed.
- the emission luminance (cd / m 2 ) at an applied voltage of 10 V and the effective half-life of the organic EL element were measured by constant current measurement with the initial luminance set at 100 cd / m 2 .
- Table 2 shows the results.
- the numbers 1 to 4 in Table 2 mean Examples 1 to 4, and indicate that the organic rhenium complex was obtained in each example.
- R e (CO) 4 (7,8-Venzoquinoline Norin) was synthesized. That is, as shown in the following reaction formula, Re (CO) 5 CI and 7,8-benzoquinoline were reacted by stirring and refluxing for several hours in toluene degassed with nitrogen gas. Hot hexane was added to the reaction product remaining after evaporating toluene, and the reaction product was extracted. Next, the obtained yellow crude product was recrystallized several times with hexane to remove unreacted 7,8-benzoquinoline. As described above, R e (CO) 4 (7,8-benzoquinoline) was synthesized as the organorhenium complex of the present invention.
- Re (CO) 4 (2-phenylviridine) was synthesized in the same manner as in Example 7, except that 7,8-benzoquinoline was changed to 2-phenylpyridine in Example 1.
- Re (CO) 4 (2-phenyloxazoline) was synthesized in the same manner as in Example 7, except that 7,8-benzoquinoline was replaced with 2-phenyloxazoline in Example 1. did.
- Re (CO) 4 (2-fluorothiozolin) was synthesized in the same manner as in Example 7, except that 7,8-benzoquinoline was changed to 2-phenylthiozoline.
- Example 1 R e (CO) 4 (2- (2,1 phenyl) was used in the same manner as in Example 7 except that 7,8-benzoquinoline was replaced with 2- (2,1 phenyl) thiozoline. ) Tzozoline) was synthesized.
- Example 7 R e (CO) 4 (3—) was used in the same manner as in Example 1 except that 7,8-benzoquinoline was changed to 3- (2,1-thiozolyl) -12H_pyran-12-one. (2, -Thizolyl) 1-2H-pyran-12-one) was synthesized.
- TPD 3-methylcarbamoyl
- the organic rhenium complex synthesized in each of Examples 1 to 7 was vapor-deposited on the hole transporting layer by TPD so as to have a thickness of 20 nm to form a light emitting layer.
- the organic EL device When a voltage is applied to the ITO electrode (positive electrode) and the A 1 -Li alloy (negative electrode) in the manufactured organic EL device, the organic EL device emits red light with high color purity at a voltage of 5 V or more. Observed.
- the emission luminance (cd / m 2 ) at an applied voltage of 1 OV and the effective half-life of the organic EL device were measured by constant current measurement with the initial luminance set to 100 cd / m 2 .
- Table 3 shows the results.
- the numeral 713 in Table 3 means Example 713, which means that it is the organic rhenium complex obtained in each Example.
- Example 14 the formation of the light-emitting layer using the organic rhenium complex alone was performed by combining the organic rhenium complex with 4,4,1-bis (9-l-rubazolyl) -biphenyl (CBP) represented by the structural formula (59). Were formed in the same manner as in Example 8, except that the CBP was 99 molecules (99 mol) per 1 molecule (1 mol) of the organic rhenium complex. An element was manufactured.
- CBP 4,4,1-bis (9-l-rubazolyl) -biphenyl
- the ITO electrode positive electrode
- the A1-Li alloy negative electrode
- dpphen is an abbreviation for 4,7-dipheninole-1,10_phenanthroline
- ecda is 1- (ethoxycarbonyl) 1-1-cyanoethylene-1,2,2 —This is an abbreviation for dithiolate.
- KOH potassium hydroxide
- ethyl cyanoacetic acid ethyl cyanoacetic acid
- carbon disulfide ethyl cyanoacetic acid
- a polymer-dispersed organic EL device was produced as follows. That is, the glass substrate on which the ITO electrode as the positive electrode was formed was ultrasonically cleaned with water, acetone and isopropyl alcohol, and subjected to UV ozone treatment. Then, polyvinyl carbazole (PVCz) was applied to the ITO electrode. A hole transport layer / light emitting layer doped with 5% by mass of the organometallic complex (pt (dppen) (ecda)) synthesized in 16 was coated to a thickness of 50 nm by spin coating.
- PVCz polyvinyl carbazole
- the emission luminance (cd / m 2 ) at an applied voltage of 10 V and the effective half-life of the organic EL element were measured by constant current measurement with the initial luminance set to 100 cd / m 2. (cd / m 2 ), and the effective half life was 500 hours.
- KOH potassium hydroxide
- ethyl cyanoacetic acid and disulfide were used in the same manner as in Example 16.
- K 2 (ecda) was synthesized from carbon and carbon. That is, as shown in the following reaction formula, 11.2 g of shattered potassium hydroxide was added to dioxane, and dissolved in dioxane while stirring at a temperature of 15 to 20 ° C. To this solution, 11.3 g of ethyl cyanoacetic acid and 7.6 g of carbon disulfide were slowly added. After the addition, the mixture was stirred for about 20 minutes and diluted with ether to form a yellow precipitate.
- FIG. 9 to 32 show graphs of luminescence spectrum data as a result of measuring the luminescence spectrum of the 24 kinds of organic platinum complexes.
- the emission spectrum was measured as follows. That is, 24 kinds of organoplatinum complexes were dispersed in a polyester resin (optically inactive) at 2% by mass and applied onto a glass substrate by spin coating. The mixture was heated at 130 ° C for 5 hours under normal pressure, and the solvent was evaporated to obtain a uniform thin film.
- the sample was irradiated with ultraviolet light having a wavelength of 365 nm, and the emission spectrum was measured.
- Spectroradiometer CS-1000 manufactured by MI NOLTA was used as a detector.
- Pt (dimine) (aromatic dithiolate) was synthesized, and the physical properties and characteristics of spectrum and others were compared.
- the emission spectrum was measured in the same manner as above for the organoplatinum complexes of these two types of comparative experiments, and the resulting emission spectrum data graphs are shown in FIGS.
- the luminescence lifetime was measured using four of the 24 types of organoplatinum complexes of the present invention obtained above and using two types of comparative organoplatinum complexes. Specifically, each of these organoplatinum complexes was dispersed at 4% by mass in rubazole, and applied to a glass substrate by spin coating. The solution was beta-pressed at 130 ° C for 5 hours under normal pressure, and the solvent was evaporated to obtain a uniform thin film.
- the measurement was performed using a streak camera C5094, manufactured by Hamamatsu Photo-Tas Co., Ltd., with nitrogen laser excitation (wavelength 337 nm). During the measurement, the sample chamber was evacuated to eliminate the influence of air. The luminescence lifetime of the complex was calculated from the measured time-resolved spectrum power by the following equation (1).
- the two luminescence decay times are noted because the luminescence decay curve of this platinum complex was a two-component system. Shows the decay time of the 1st component, and the latter shows the decay time of the 2nd component.
- the luminescence lifetime is not significantly different depending on the complex ligand, the value is very short, 5 s or less, and the phosphorescent emission has a very short decay time.
- This can be said to be suitable as a light emitting material for an organic EL device.
- the ratio between the room temperature emission intensity and the 6 K emission intensity shows the relative value of the room temperature emission intensity when the 6 K intensity is set to “1”. Considered less). All showed values of 0.8 or more, indicating that heat deactivation was extremely small.
- the emission lifetime did not differ greatly depending on the complex ligand, and the value was 5 ⁇ s or less, which was very short for phosphorescence, but the ratio of room temperature emission intensity to 6 ⁇ emission intensity was It can be seen that the heat deactivation is large, as small as 0.5 and 0.3.
- a glass substrate with an ITO (sheet resistance value: 10 ⁇ / port) film was used as the element substrate.
- the substrate was subjected to ultrasonic cleaning for 15 minutes each in the order of pure water, acetone, pure water, and IPA, and subjected to UV ozone treatment.
- the hole transport layer and the light emitting layer were formed by spin coating using SPI NCOATER 1H-d3 manufactured by MI KAS A.
- the deposition conditions were 1st: 1 OOO rpm, 10 s, 2nd: 2500 rpm, 60 s for both the hole transport layer (PEDOT) and the light emitting layer (? ⁇ 1: +? 80 +? T complex).
- the organic solvent was removed by beta at 150 ° C., 10 hours, and 120 ° C., respectively, for hours.
- the solution was passed through a 0.2 ⁇ filter to remove any remaining organic materials and solid impurities.
- the test was carried out at normal pressure and in the atmosphere using TYO-300 manufactured by Pas ⁇ 1 ina.
- the hole blocking layer and the cathode were formed using a resistance heating type vacuum evaporation apparatus (VPC-4100, manufactured by ULVAC, Inc.).
- the degree of vacuum is 10 to 4 Pa and the deposition rate is 0.1 to 0.2 nm / s when the hole blocking layer is formed, and the degree of vacuum is 10 to 4 Pa and the deposition rate is 1 to 2 when the cathode is formed.
- Emitting portion area of the fabricated device is 2 X 2 mm 2, a layer of an organic EL device
- the configuration is as follows.
- Tables 7 and 8 show the characteristics of the manufactured organic EL device.
- the luminance indicates the value when 12 V was applied
- the element life indicates the luminance half-life when driving at a constant current from a luminance of 100 cd / m 2 .
- Pt (2,2, -bipyridine) (1, di-cyano-2,2-dithio-ethylene) complex (PT-001) was synthesized as follows. That is, in 15 ml acetone, J. Am. Chem. Soc. 1 990, 112, 5625—5627 & J. Cem. Soc. D a1 ton Trans. 19
- the compound of the formula (1) synthesized by the method described in 78, 127 was dissolved in 0.422 g.
- the compound represented by 2 synthesized in 10 ml of methanol by the method described in Acta Chem. Scand. g was dissolved and dropped. This resulted in the formation of an orange precipitate. Centrifuge to make organometallic
- the complex was precipitated and collected by filtration. This acetone, ethanol, and washing with Jeffrey chill ether and dried in vacuo (see Coord. Chem. Rev. 97, 1990 , 47 -64).
- Table 9 shows the emission wavelengths of the synthesized organoplatinum complex (PT-001 to PT-007) powders.
- the wavelength indicates the peak wavelength of the emission spectrum observed by irradiating excitation light of 365 nm.
- R e (CO) 5 C 1 2. 5 g and, benzo [h] quinoline 1. 5 g a few hours in the already generated in toluene was degassed with argon, stirring and refluxing. Toluene was evaporated and warm hexane was added to the remaining mixture to extract the desired product. The unreacted benzoquinoline was removed by recrystallizing the obtained crude yellow product several times with hexane.
- the desired organorhenium complex (RE-001) was obtained by mass spectrometry (see Peter Spellane, and Richard J. Watts, Inorg. Chem. 32 (1993) 5633).
- Table 10 shows the emission wavelength of the powder of the synthesized organic rhenium complex (RE-001 to 004).
- the wavelength indicates a peak wavelength of an emission spectrum observed by irradiating 365 nm of excitation light.
- a color conversion layer using the synthesized organoplatinum complex was prepared in the same manner as in Example 20, and when the light of 400 nm, 450 nm, and 500 nm was color-converted, the color conversion layer was obtained.
- light emission corresponding to Table 10 was observed at a high conversion efficiency, and the light resistance was 100% less than 1% of the conversion efficiency before exposure compared to exposure for 100 hours. , was very good.
- the color conversion layer was less than half as thin as the one using the fluorescent dye, an organic EL device using this was manufactured. As a result of suppressing non-light emission, the life of the device was improved.
- One coordination comprising a rhenium (R e) atom, a nitrogen atom and an oxygen atom coordinated to the rhenium (R e) atom, and having at least one ⁇ -conjugated moiety. And another ligand that coordinates the rhenium (Re) atom so as to saturate the coordination number of the rhenium (Re) atom and keep the charge of the whole organometallic complex neutral.
- An organometallic complex comprising:
- the nitrogen atom coordinated to the rhenium (R e) atom is part of one cyclic structure, and the rhenium (R e) in the one ligand is 2.
- the cyclic structure and the other cyclic structure are selected from a 5-membered ring and a 6-membered ring, and at least one carbon atom in each is bonded to each other, or at least one carbon atom in each of them. 3.
- R 1 and R 2 may be the same or different, and represent a hydrogen atom or a substituent.
- i and ⁇ represent integers.
- Cy 1 represents one cyclic structure including an N atom coordinated with a reium (R e ) atom, and two C atoms bonded to the N atom and shared with Cy 2 .
- Cy 2 is rhenium (Re ) Represents another cyclic structure containing the two C atoms bonded to an O atom and shared with Cy 1 .
- n includes Cy 1 and Cy 2 and represents one of the coordination numbers 1-3 coordinating to the rhenium (R e) atom of one ligand that is bidentately coordinated to the rhenium (R e) atom .
- L represents another ligand that saturates the coordination number of the rhenium (R e) atom and keeps the charge of the entire complex neutral.
- m represents an integer of 0 to 4.
- R 3 and R 4 may be the same or different, and represent a hydrogen atom or a substituent.
- i and j represent integers.
- Cy 3 represents one cyclic structure including an N atom coordinated to a rhenium (R e) atom, and a carbon atom bonded to the N atom and bonded to a C atom in Cy 4 .
- Cy 4 represents another cyclic structure including a carbon atom bonded to a carbon atom bonded to a carbon atom in Cy 3 and a carbon atom bonded to an oxygen atom bonded to a rhenium (Re) atom.
- n includes Cy 3 and Cy 4 , one of the coordination numbers 1-3 coordinating to the rhenium (R e ) atom of one ligand bidentate to the rhenium (R e ) atom Represents L represents another ligand that saturates the coordination number of the rhenium (Re) atom and keeps the charge of the entire complex neutral.
- m represents an integer of 0 to 4.
- R 1 to R 4 may be the same or different, and represent a hydrogen atom or a substituent.
- i, j, k and 1 represent integers.
- C y 1 represents a N atom coordinating to the rhenium (R e) atom, an annular structure including a two C atoms that are shared with the N atom and bonded vital Cy 2.
- Cy 2 is rhenium
- (R e) represents another cyclic structure containing the two C atoms, which is bonded to the O atom bonded to the atom and shared with Cy 1 .
- Cy 3 represents one cyclic structure including an N atom coordinated to a rhenium (R e) atom, and a carbon atom bonded to the N atom and bonded to a C atom in Cy 4 .
- Cy 4 represents another cyclic structure including a carbon atom bonded to an O atom bonded to a rhenium (Re) atom and a C atom bonded to a carbon atom in Cy 3 .
- L represents another ligand that saturates the coordination number of the rhenium (R e) atom and keeps the charge of the entire complex neutral.
- m represents 1-2.
- R 5 to 1 ° may be the same or different, and represent a hydrogen atom or a substituent.
- n represents the number of ligands.
- L represents another ligand that saturates the coordination number of the rhenium (Re) atom and keeps the charge of the entire complex neutral.
- m represents an integer of 0 to 4.
- ligands may be a halogen atom, a carboxy group, a cyano group, a hydroxyaryl group, a phenylisocyanide group, a pyridyl group, an acetylcetonato group, a 2,2,1-biviridyl group, a 1,10- 9.
- the organometallic complex according to any one of supplementary notes 1 to 8, wherein the organometallic complex is selected from a phenantophore phosphorus group, a cyclometallate 'ligand group, and a triphenylphosphine group.
- the rhenium (Re) atom has another ligand that saturates the coordination number of the rhenium (Re) atom and coordinates so as to keep the charge of the whole organometallic complex neutral.
- An organometallic complex comprising:
- cyclic structure and other cyclic structures are selected from 5-membered and 6-membered rings.
- R 1 and R 2 may be the same or different, and represent a hydrogen atom or a substituent.
- i and j represent integers.
- Cy 1 represents one cyclic structure including an N atom coordinated to a rhenium (R e) atom, and a C atom bonded to the N atom and bonded to a C atom in Cy 2 .
- Cy 2 represents another cyclic structure including a C atom bonded to a rhenium (R e) atom and a C atom bonded to the C atom and bonded to a C atom in Cy 1 .
- n includes Cy 1 and Cy 2, represents any rhenium (R e) of the atoms in the bidentate coordinating one ligand rhenium (R e) coordination number coordinates to atom 1-3 .
- L represents another ligand that saturates the coordination number of the rhenium (R e) atom and keeps the charge of the entire complex neutral. Represents an integer of 0 to 4.
- R 3 to 10 may be the same as or different from each other, represent a hydrogen atom or a substituent, and may be further substituted with a substituent. Adjacent ones of these may be connected to each other to form an aromatic ring containing any of a nitrogen atom, a sulfur atom and an oxygen atom.
- n represents an integer of 1 to 3.
- L represents another ligand that saturates the coordination number of the rhenium (Re) atom and keeps the charge of the entire complex neutral.
- m represents an integer of 0 to 4.
- R 3 ⁇ scale 1 0 may be the same with each other, may be the different from one represents a hydrogen atom or a substituent, it may be substituted with a substituent In addition, adjacent ones of these may be connected to each other to form an aromatic ring containing any of a nitrogen atom, a sulfur atom and an oxygen atom.
- n represents an integer of 1 to 3.
- L represents another ligand that saturates the coordination number of the rhenium (Re) atom and keeps the charge of the entire complex neutral.
- m represents an integer of 0 to 4.
- R 3 to R 8 may be the same as or different from each other, represent a hydrogen atom or a substituent, and may be further substituted with a substituent. In addition, adjacent ones of these may be mutually different to form an aromatic ring containing any of a nitrogen atom, a sulfur atom and an oxygen atom.
- n represents an integer of 1 to 3.
- L represents another ligand that saturates the coordination number of the rhenium (R e) atom and keeps the charge of the entire complex neutral.
- m represents an integer of 0 to 4.
- R 3 to R 8 may be the same or different from each other, represent a hydrogen atom or a substituent, and may be further substituted with a substituent. In addition, adjacent ones of these may be connected to each other to form an aromatic ring containing any of a nitrogen atom, a sulfur atom and an oxygen atom.
- n represents an integer of 1 to 3.
- L represents another ligand that saturates the coordination number of the rhenium (R e ) atom and keeps the charge of the entire complex neutral.
- m represents an integer of 0 to 4.
- R 3 to R 8 may be the same as or different from each other, represent a hydrogen atom or a substituent, and may be further substituted with a substituent. Adjacent ones of these may be connected to each other to form an aromatic ring containing any of a nitrogen atom, a sulfur atom and an oxygen atom.
- n represents an integer of 1 to 3.
- L represents another ligand that saturates the coordination number of the rhenium (Re) atom and keeps the charge of the entire complex neutral.
- m represents an integer of 0 to 4.
- R 3 to R 6 may be the same as or different from each other, represent a hydrogen atom or a substituent, and may be further substituted with a substituent. Adjacent ones of these may be connected to each other to form an aromatic ring containing any of a nitrogen atom, a sulfur atom and an oxygen atom.
- n represents an integer of 1 to 3.
- L represents another ligand that saturates the coordination number of the rhenium (Re) atom and keeps the charge of the entire complex neutral. Represents an integer of 0 to 4.
- R 3 to R 6 may be the same as or different from each other, represent a hydrogen atom or a substituent, and may be further substituted with a substituent. Adjacent ones of these may be connected to each other to form an aromatic ring containing any of a nitrogen atom, a sulfur atom and an oxygen atom.
- n represents an integer of 1 to 3.
- L represents another ligand that saturates the coordination number of the rhenium (Re) atom and keeps the charge of the entire complex neutral.
- m represents an integer of 0 to 4.
- ligands may be a halogen atom, a carbonyl group, a cyano group, a hydroxyaryl group, a phenylisocyanide group, a pyridyl group, an acetylsyltonato group, a 2,2,1-bipyridyl group, a 1,10-phenanthane 23.
- the ligand of — is coordinated with the Group 8 metal atom so as to saturate the coordination number of the Group 8 metal atom and keep the overall charge of the organometallic complex neutral.
- R 1 represents a divalent aliphatic organic group or a divalent heteroaromatic organic group.
- M represents a Group 8 metal atom.
- L represents a ligand coordinated to the Group 8 metal atom M at any of monodentate and bidentate or more, and having at least one ⁇ -conjugated moiety.
- ⁇ represents an integer of 1 to 6.
- R 1 represents a divalent aliphatic organic group or a divalent heteroaromatic organic group.
- the ligand of — has an atom capable of coordinating to a Group 8 metal atom in a monodentate or didentate or higher position in a part of the aromatic ring, and the atom is 28.
- the organometallic complex according to any one of supplementary notes 24 to 27, which is selected from a nitrogen atom, an oxygen atom, a sulfur atom, a selenium atom, a tellurium atom, a polonium atom and a phosphorus atom.
- R 2 represents a halogen atom, a cyano group, an alkoxy group, an amino group, an alkyl group, an alkyl acetate group, a cycloalkyl group, an aryl group or an aryloxy group, and these are substituted with a substituent. It may be.
- p represents an integer of 0 to 5.
- M represents a Group 8 metal atom.
- the ligand that is bonded to M and contains a nitrogen atom represents a ligand having at least one ⁇ -conjugated moiety, and is coordinated with the ⁇ in any one of monodentate and bidentate or more.
- R 3 is a hydrogen atom, a halogen atom, a cyano group, an alkoxy group, an amino group, an alkyl group, an alkyl acetate group, a cycloalkyl group, a nitrogen atom, a Represents a reel group or an aryloxy group, which may be substituted with a substituent, and q represents an integer of 0 to 8. n represents an integer of 1 to 4.
- the ligand bonded to M and containing a sulfur atom represents a dithiolate ligand selected from an aliphatic dithiolate ligand and a heteroaromatic dithiolate ligand.
- R 1 represents a divalent aliphatic organic group or a divalent heteroaromatic organic group.
- R 1 and R 2 may be the same or different, and represent a hydrogen atom or a substituent.
- Cy 1 is located on the platinum (Pt) atom. And represents a ring structure including a N atom located at the position and a C atom bonded to the N atom and bonded to a C atom in Cy 2 .
- Cy 2 represents another cyclic structure including a C atom bonded to a platinum (Pt) atom and a C atom bonded to the C atom and bonded to a C atom in Cy 1 .
- the ligand bonded to Pt and containing a sulfur atom represents a dithiolate ligand selected from an aliphatic dithiolate ligand and a heteroaromatic dithiolate ligand.
- R 3 represents a divalent aliphatic organic group or a divalent heteroaromatic organic group.
- heteroaromatic dithiolate ligand is an aromatic dithiolate ligand represented by any of the following structural formulas (20) to (23). Organometallic complexes.
- R 4 represents a halogen atom, a cyano group, an alkoxy group, an amino group, an alkyl group, an alkyl acetate group, a cycloalkyl group, a nitrogen atom, an aryl group or an aryloxy group. However, these may be substituted with a substituent.
- m represents an integer of 0 to 5.
- R 5 and R 6 may be the same or different from each other, and include a hydrogen atom, a halogen atom, a cyano group, and an alkoxy group.
- R 3 is a hydrogen atom, a halogen atom, a cyano group, an alkoxy group, an amino group, an alkyl group, an alkyl acetate group, a cycloalkyl group, a nitrogen atom, a Represents a reel group or an aryloxy group, which may be substituted with a substituent, and q represents an integer of 0 to 8. n represents an integer of 1 to 4.
- the ligand bonded to M and containing a sulfur atom represents an aliphatic dithiolate ligand.
- R 5 and R 6 may be the same or different from each other, and include a hydrogen atom, a halogen atom, a cyano group, an alkoxy group, an amino group, an alkyl group, Represents an alkyl acetate group, a cycloalkyl group, a nitrogen atom, an aryl group or an aryloxy group, which may be substituted with a substituent.
- M represents a Group 8 metal atom.
- R 7 are the same as each other Hydrogen, halogen, cyano, alkoxy, amino, alkyl, alkylacetate, cycloalkyl, nitrogen, aryl, or aryloxy. May be substituted with a substituent.
- r represents an integer of 0 to 5.
- An organic EL device comprising an organic thin film layer between a positive electrode and a negative electrode, wherein the organic thin film layer contains the organometallic complex according to any one of supplementary notes 1 to 38. .
- the organic EL according to supplementary note 41 wherein the organic thin film layer has a light emitting layer sandwiched between the hole transport layer and the electron transport layer, and the light emitting layer contains an organometallic complex as a light emitting material. element.
- n an integer of 2 or 3.
- Ar represents a divalent or trivalent aromatic group or a heterocyclic aromatic group.
- R 16 and R 17 are the same as each other And may be different, and represent a monovalent aromatic group or a heterocyclic aromatic group.
- Ar represents a divalent or trivalent group containing an aromatic ring, or a divalent or trivalent group containing a heterocyclic aromatic ring.
- R 1 8 and R 1 9 are each independently a hydrogen atom, a halogen atom, an alkyl group, Ararukiru group, Aruke - group, Ariru group, Shiano group, an amino group, Ashiru group, an alkoxycarbonyl group, a carboxyl group, an alkoxy Group, alkylsulfonyl group, hydroxyl group, amide group, aryloxy group, aromatic hydrocarbon ring group, or aromatic heterocyclic group, which may be further substituted with a substituent.
- n represents an integer of 2 or 3.
- M represents a metal atom.
- R 2 ° represents a hydrogen atom, a halogen atom, an alkyl group, an aralkyl group, an alkenyl group, an aryl group, a cyano group, an amino group, an acyl group, an alkoxycarbonyl group, a carbonyloxy group, an alkoxy group, an alkylsulfonyl group, Hydroxyl group, amide group, aryloxy group, aromatic hydrocarbon ring group, or aromatic heterocyclic group And these may be further substituted with a substituent.
- Supplementary note 49 Any one of Supplementary notes 41 to 48, further comprising a color conversion layer, wherein the color conversion layer is capable of converting incident light into light having a wavelength longer than that of the light by 100 nm or more.
- An organic EL device according to any one of the above.
- the organic EL display according to supplementary note 63 which is one of a passive matrix panel and an active matrix panel.
- Supplementary note 67 The light emitted by the EL emission is white light, and is placed on the blue pixel.
- Supplementary notes 63 to 6 further comprising a color conversion layer, wherein the color conversion layer disposed on the red pixel includes at least one selected from the organometallic complexes described in any one of Supplementary notes 1 to 38. 6.
- the light emitted by the EL emission is blue light
- the color conversion layer disposed on the red pixel is at least one selected from the organometallic complexes described in any of Supplementary Notes 1 to 38.
- An organic EL display comprising a color conversion layer disposed on a green pixel and a red pixel.
- the light emitted by the EL emission is white light, and has a color conversion layer disposed on a blue pixel.
- the color conversion layer disposed on a red pixel is as described in Supplementary Notes 1 to 38.
- the organic EL display according to attachment 69 comprising at least one selected from organometallic complexes represented by any of the above.
- an organic metal complex which exhibits phosphorescence and is suitable as a light-emitting material, a color conversion material, and the like in an organic EL device.
- Organic EL devices with excellent luminous efficiency, thermal, electrical stability, color conversion efficiency, etc., and using the organometallic complex or the organic EL device, high performance and long life, average
- the driving current can be made constant regardless of the light-emitting pixel, and an organic EL display suitable for a full-color display or the like with good color balance can be provided without changing the light-emitting area.
- the organometallic complex of the present invention emits phosphorescence and can be suitably used as a light emitting material, a color conversion material, and the like in an organic EL device.
- the organic EL device of the present invention Since a metal complex is used, it has excellent lifetime, luminous efficiency, thermal and electrical stability, color conversion efficiency, etc., and can be suitably used for organic EL displays. Since the organic EL display of the present invention uses the organic EL element, it has high performance and long life, and can be suitably used for display screens of televisions, mobile phones, personal computers, and the like.
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EP03791337.3A EP1550707B1 (en) | 2002-08-27 | 2003-08-27 | Organometallic complexes, organic el devices, and organic el displays |
AU2003261758A AU2003261758A1 (en) | 2002-08-27 | 2003-08-27 | Organometallic complexes, organic el devices, and organic el displays |
JP2004532728A JP4313308B2 (ja) | 2002-08-27 | 2003-08-27 | 有機金属錯体、有機el素子及び有機elディスプレイ |
US11/066,315 US20050244673A1 (en) | 2002-08-27 | 2005-02-25 | Organometallic complex, organic EL element and organic EL display |
US12/243,695 US20090121620A1 (en) | 2002-08-27 | 2008-10-01 | Organometallic complex, organic el element and organic el display |
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US9603703B2 (en) | 2009-08-03 | 2017-03-28 | Abbott Medical Optics Inc. | Intraocular lens and methods for providing accommodative vision |
US10105215B2 (en) | 2009-08-03 | 2018-10-23 | Johnson & Johnson Surgical Vision, Inc. | Intraocular lens and methods for providing accommodative vision |
US9987125B2 (en) | 2012-05-02 | 2018-06-05 | Johnson & Johnson Surgical Vision, Inc. | Intraocular lens with shape changing capability to provide enhanced accomodation and visual acuity |
JP2020534560A (ja) * | 2017-08-25 | 2020-11-26 | ナノシス・インク. | ナノ構造に基づいた表示装置 |
JP7357184B2 (ja) | 2017-08-25 | 2023-10-06 | ナノシス・インク. | ナノ構造に基づいた表示装置 |
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Also Published As
Publication number | Publication date |
---|---|
JP4313308B2 (ja) | 2009-08-12 |
KR20050059121A (ko) | 2005-06-17 |
EP1550707A4 (en) | 2006-04-12 |
CN1678712A (zh) | 2005-10-05 |
EP1550707B1 (en) | 2016-03-23 |
US20090121620A1 (en) | 2009-05-14 |
KR100686268B1 (ko) | 2007-02-28 |
JPWO2004020549A1 (ja) | 2005-12-15 |
CN100439469C (zh) | 2008-12-03 |
US20050244673A1 (en) | 2005-11-03 |
EP1550707A1 (en) | 2005-07-06 |
EP2261301A1 (en) | 2010-12-15 |
EP2264122A3 (en) | 2011-05-11 |
AU2003261758A1 (en) | 2004-03-19 |
EP2264122A2 (en) | 2010-12-22 |
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