CN112940043A - Organic metal complex and organic photoelectric element containing same - Google Patents

Organic metal complex and organic photoelectric element containing same Download PDF

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CN112940043A
CN112940043A CN202110123457.1A CN202110123457A CN112940043A CN 112940043 A CN112940043 A CN 112940043A CN 202110123457 A CN202110123457 A CN 202110123457A CN 112940043 A CN112940043 A CN 112940043A
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organic
organometallic complex
independently selected
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王子兴
夏蓉蓉
赵晓宇
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Zhejiang Huadisplay Optoelectronics Co Ltd
University of Shanghai for Science and Technology
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Zhejiang Huadisplay Optoelectronics Co Ltd
University of Shanghai for Science and Technology
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    • C07F15/00Compounds containing elements of Groups 8, 9, 10 or 18 of the Periodic Table
    • C07F15/0006Compounds containing elements of Groups 8, 9, 10 or 18 of the Periodic Table compounds of the platinum group
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    • C09K11/00Luminescent, e.g. electroluminescent, chemiluminescent materials
    • C09K11/06Luminescent, e.g. electroluminescent, chemiluminescent materials containing organic luminescent materials
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    • H10KORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K50/00Organic light-emitting devices
    • H10K50/10OLEDs or polymer light-emitting diodes [PLED]
    • H10K50/11OLEDs or polymer light-emitting diodes [PLED] characterised by the electroluminescent [EL] layers
    • HELECTRICITY
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    • H10K85/00Organic materials used in the body or electrodes of devices covered by this subclass
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    • H10K85/341Transition metal complexes, e.g. Ru(II)polypyridine complexes
    • H10K85/346Transition metal complexes, e.g. Ru(II)polypyridine complexes comprising platinum
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Abstract

The invention provides an organic metal complex and an organic photoelectric element containing the same, in particular to an organic electroluminescent diode, wherein the structure of the organic metal complex is shown as the formula (I):
Figure DDA0002922953350000011
m is selected from platinum (Pt) or palladium (Pd); detailed information of the organometallic complex and the organic photoelectric element can be understood by the specific description provided herein. The organometallic compound provided by the invention can obtain OLED devices with high efficiency and long service life, the light-emitting spectrum is between 490 nanometers and 750 nanometers, and the organometallic complex is shown on green light to red light OLEDsPotential applications of (1). The platinum and palladium metals are rich in earth crust, can replace rare metal iridium to form sustainable organic metal complexes, and have good commercial application prospect.

Description

Organic metal complex and organic photoelectric element containing same
Technical Field
The invention belongs to the field of organic photoelectricity, and particularly relates to an organic metal complex and an organic photoelectric element comprising the same, in particular to an organic electroluminescent diode.
Background
As a novel display technology, the organic light-emitting diode (OLED) has the unique advantages of self luminescence, wide viewing angle, low energy consumption, high efficiency, thinness, rich colors, high response speed, wide applicable temperature range, low driving voltage, capability of manufacturing flexible, bendable and transparent display panels, environmental friendliness and the like, can be applied to flat panel displays and new generation illumination, and can also be used as a backlight source of an LCD.
The OLED emission is divided into two modes of fluorescence emission and phosphorescence emission, and it is theorized that the ratio of a singlet excited state to a triplet excited state due to charge binding is 1: 3. Professor Baldo and Forrest in 1998 discovered that triplet phosphorescence can be utilized at room temperature, and the upper limit of the original internal quantum efficiency is increased to 100%, and triplet phosphors are often heavy metal atoms and are formed by complexes, and the strong spin-orbit coupling effect causes the energy levels of a singlet excited state and a triplet excited state to be mixed with each other by utilizing the heavy atom effect, so that the originally forbidden triplet energy is relieved to emit light in the form of phosphorescence, and the quantum efficiency is greatly improved.
At present, a host-guest light emitting system mechanism is almost completely used for a light emitting layer in an OLED assembly, namely, a guest light emitting material is doped in a host material, a commonly used organic guest material is an iridium metal compound, the iridium metal compound is mainly applied to commercial OLED materials at present, but the iridium metal is very expensive and has insufficient content in earth crust, an organic metal complex is required to replace the expensive iridium metal complex, and the alternative scheme of the OLED light emitting material is expanded.
The invention finds that an organic metal compound (Pt or Pd) can improve the luminous efficiency of the organic metal compound by introducing a specific cyclic structure, a substituent group and the like, ensures that the organic metal compound has high-efficiency luminous characteristics, and can obtain high current efficiency and reduce the operating voltage of components when being applied to organic photoelectric elements, particularly organic electroluminescent devices.
Disclosure of Invention
The invention aims to provide an organic metal complex and a photoelectric device comprising the same, in particular to an organic light-emitting diode.
The structure of the organic metal complex provided by the invention is shown as the formula (I):
Figure BDA0002922953330000021
wherein, in formula (I), M is platinum (Pt) or palladium (Pd); at least one of X1 to X5 is independently selected from the group consisting of a bond, O, S, N-R6, B-R6, P-R6, O ═ P-R6, (C-R6R7) n, C ═ O, S ═ O, S (═ O)2Or one of Si-R6R 7; x6 to X7 are absent or independently selected from the group consisting of a bond, O, S, N-R6, B-R6, P-R6, O ═ P-R6, (C-R6R7) n, C ═ O, S ═ O, S (═ O)2Or one of Si-R6R 7; t is independently selected from one of N-R6, B-R6, P-R6, O-P-R6, C-R6R7 or Si-R6R 7; y1 to Y13 are independently selected from C or N; l1 is independently selected from a bond, or C O, S O, S (═ O)2L2 is independently selected from chemical bond, or one of O, N-R6 and S, and when L1 and L2 are chemical bonds at the same time, Y1 or Y7 is directly bonded to metal M; rings CY1 to CY5 each independently form a C6 to C40 ring group and a C1 to C40 heterocyclic group with the corresponding Y1 to Y13, CY6 being a five-membered ring; r1 to R7 are each independently selected from hydrogen, deuterium, CN, halogen, hydroxyl, nitro, salts of carboxylic acids, sulfonic acid groups or salts thereof, phosphoric acid groups or salts thereof, hydrazino, amidino, amide, substituted or unsubstituted C1 to C60 alkyl, substituted or unsubstituted C2 to C60 alkenyl, substituted or unsubstituted C1 to C60 alkoxy, substituted or unsubstituted C1 to C60 cycloalkyl, substituted or unsubstituted C1 to C60 heteroalkyl, substituted or unsubstituted C6 to C60 aryl, substituted or unsubstituted C1 to C60 heteroaryl, substituted or unsubstituted C1 to C60 amine, substituted or unsubstituted C1 to C60 silicon, substituted or unsubstituted C6 to C60 aromatic fused ring, and substituted or unsubstituted C1 to C60 heteroaromatic fused ring; r1 to R7 each independently may be partially or fully deuterated, each independently may be partially or fully fluorinated; r1 to R7 may be unsubstituted or polysubstituted according to the valence bond principle.
Preferably, the organometallic complex of the present invention has two atoms bonded to the metal M to form covalent bonds and two atoms to form coordinate bonds, so that the organometallic complex is in a neutral state.
Preferably, the organometallic complex of the invention, of the formula (I)
Figure BDA0002922953330000022
Moieties are independently selected from one of the following representative groups, but not representative of the group:
Figure BDA0002922953330000031
wherein X8 is independently selected from O, S, N-R6, B-R6, P-R6, O ═ P-R6, C-R6R7, C ═ O, S ═ O, S (═ O)2Or one of Si-R6R 7; y is N or C-R8, R6, R7, R8 are the same as R1 in claim 1, and when R8 is 2 or more, the same or different from each other, adjacent R1 to R8 may form a ring.
Preferably, the organometallic complex of the invention, of the formula (I)
Figure BDA0002922953330000032
Moieties are independently selected from one of the following representative groups, but not representative of the group:
Figure BDA0002922953330000033
wherein T, Y3 and Y4 are the same as defined in claim 1, Y is N or C-R8, R6, R7 and R8 are the same as defined in claim 1 for R1, and when R8 is 2 or more, the same or different from each other, adjacent R1 to R8 may form a ring.
Preferably, the organometallic complex of the invention, of the formula (I)
Figure BDA0002922953330000041
The moiety is typically selected from one of the following groups, but does not represent a limitation thereto:
Figure BDA0002922953330000042
wherein Y11 is the same as in claim 1; x9 and X10 are independently selected from one of O, S, N-R6, B-R6, P-R6, O-P-R6, C-R6R7, C-O, S-O, S (═ O)2, or Si-R6R 7; y is N or C-R8, R6, R7, R8 are the same as R1 in claim 1, and when R8 is 2 or more, the same or different from each other, adjacent R1 to R8 may form a ring.
Preferably, the organometallic complex of the invention, of the formula (I)
Figure BDA0002922953330000043
Moieties are independently selected from one of the following representative groups, but not representative of the group:
Figure BDA0002922953330000044
wherein Y8 is the same as in claim 1; x11 is independently selected from one of O, S, N-R6, B-R6, P-R6, O ═ P-R6, C-R6R7, C ═ O, S ═ O, S (═ O)2, or Si — R6R 7; y is N or C-R8, R6, R7, R8 are the same as R1 in claim 1, and when R8 is 2 or more, the same or different from each other, adjacent R1 to R8 may form a ring.
Preferably, the organometallic complex of the invention formula (I) is selected from one of the following representative structures, but does not represent a limitation thereto:
Figure BDA0002922953330000051
Figure BDA0002922953330000061
Figure BDA0002922953330000071
Figure BDA0002922953330000081
Figure BDA0002922953330000091
Figure BDA0002922953330000101
Figure BDA0002922953330000111
Figure BDA0002922953330000121
Figure BDA0002922953330000131
Figure BDA0002922953330000141
Figure BDA0002922953330000151
Figure BDA0002922953330000161
Figure BDA0002922953330000171
Figure BDA0002922953330000181
Figure BDA0002922953330000191
Figure BDA0002922953330000201
Figure BDA0002922953330000211
Figure BDA0002922953330000221
Figure BDA0002922953330000231
Figure BDA0002922953330000241
Figure BDA0002922953330000251
Figure BDA0002922953330000261
Figure BDA0002922953330000271
Figure BDA0002922953330000281
Figure BDA0002922953330000291
Figure BDA0002922953330000301
Figure BDA0002922953330000311
Figure BDA0002922953330000321
Figure BDA0002922953330000331
Figure BDA0002922953330000341
Figure BDA0002922953330000351
Figure BDA0002922953330000361
Figure BDA0002922953330000371
Figure BDA0002922953330000381
Figure BDA0002922953330000391
Figure BDA0002922953330000401
Figure BDA0002922953330000411
Figure BDA0002922953330000421
Figure BDA0002922953330000431
Figure BDA0002922953330000441
Figure BDA0002922953330000451
Figure BDA0002922953330000461
Figure BDA0002922953330000471
Figure BDA0002922953330000481
Figure BDA0002922953330000491
Figure BDA0002922953330000501
Figure BDA0002922953330000511
Figure BDA0002922953330000521
Figure BDA0002922953330000531
Figure BDA0002922953330000541
Figure BDA0002922953330000551
Figure BDA0002922953330000561
Figure BDA0002922953330000571
Figure BDA0002922953330000581
Figure BDA0002922953330000591
Figure BDA0002922953330000601
Figure BDA0002922953330000611
Figure BDA0002922953330000621
Figure BDA0002922953330000631
Figure BDA0002922953330000641
Figure BDA0002922953330000651
Figure BDA0002922953330000661
Figure BDA0002922953330000671
the present invention relates to an organometallic complex comprising a compound represented by the formula (I) and one or more preparation(s) formed with a solvent, the solvent used is not particularly limited, and there can be used unsaturated hydrocarbon solvents such as toluene, xylene, mesitylene, tetralin, decahydronaphthalene, bicyclohexane, n-butylbenzene, sec-butylbenzene, tert-butylbenzene, etc., halogenated saturated hydrocarbon solvents such as carbon tetrachloride, chloroform, dichloromethane, dichloroethane, chlorobutane, bromobutane, chloropentane, bromopentane, chlorohexane, bromohexane, chlorocyclohexane, bromocyclohexane, etc., halogenated unsaturated hydrocarbon solvents such as chlorobenzene, dichlorobenzene, trichlorobenzene, etc., ether solvents such as tetrahydrofuran, tetrahydropyran, etc., ester solvents such as alkyl benzoate, etc., which are well known to those skilled in the art.
The present invention claims an organic optoelectronic component,
the method comprises the following steps: a first electrode; a second electrode facing the first electrode; the organic functional layer is clamped between the first electrode and the second electrode;
wherein the organic functional layer comprises the organometallic complex.
The Organic photoelectric Element of the present invention is any one of an Organic photovoltaic device, an Organic Light Emitting Device (OLED), an Organic Solar Cell (OSC), electronic paper (e-paper), an Organic Photoreceptor (OPC), an Organic Thin Film Transistor (OTFT), an Organic Memory device (Organic Memory Element), a lighting device, and a display device.
The invention also relates to an organic electroluminescent device which comprises a cathode layer, an anode layer and an organic layer, wherein the organic layer comprises at least one of a hole injection layer, a hole transport layer, a light-emitting layer, a hole blocking layer, an electron injection layer and an electron transport layer, and the light-emitting layer of the device contains the organic metal complex.
The organic electroluminescent device light-emitting layer contains the organic metal complex and a corresponding main material, wherein the mass percent of the organic metal complex is 0.1-50%.
In the present invention, the organic photoelectric device is an anode which can be formed by depositing a metal or an oxide having conductivity and an alloy thereof on a substrate by a sputtering method, electron beam evaporation, vacuum evaporation, or the like; and sequentially evaporating a hole injection layer, a hole transport layer, a luminescent layer, a hole blocking layer and an electron transport layer on the surface of the prepared anode, and then evaporating a cathode. The organic electroluminescent device is prepared by vapor deposition of the cathode, the organic layer and the anode on the substrate except the above method. The organic layer may have a multilayer structure including a hole injection layer, a hole transport layer, a light emitting layer, a hole blocking layer, and an electron transport layer. In the invention, the organic layer is prepared by adopting a high polymer material according to a solvent engineering (spin-coating), tape-casting (tape-casting), doctor-blading (sector-Printing), Screen-Printing (Screen-Printing), ink-jet Printing or Thermal-Imaging (Thermal-Imaging) method instead of an evaporation method, so that the number of the device layers can be reduced.
The materials used for the organic electroluminescent device according to the present invention may be classified into top emission, low emission, or double-sided emission. The compounds of the organic electroluminescent device according to the embodiment of the present invention can be applied to the aspects of organic solar cells, illuminating OLEDs, flexible OLEDs, organic photoreceptors, organic thin film transistors and other electroluminescent devices by a similar principle of the organic light emitting device.
The invention has the beneficial effects that:
the organic metal complex has high luminous efficiency, and the proper ligand structure can improve the energy transmission between a host and an object, and the organic metal complex is particularly characterized in that the organic electroluminescent device manufactured by taking the organic metal complex as a functional layer, especially as a luminous layer, has high current efficiency and reduced lighting voltage. After most of electrons and holes are recombined, energy is effectively transferred to the organic metal complex for luminescence, and a novel organic metal complex with excellent luminescence property is provided.
Drawings
FIG. 1 is a structural diagram of an organic electroluminescent diode device according to the present invention.
Where 110 denotes a substrate, 120 denotes an anode, 130 denotes a hole injection layer, 140 denotes a hole transport layer, 150 denotes a light emitting layer or an active layer, 160 denotes a hole blocking layer, 170 denotes an electron transport layer, 180 denotes an electron injection layer, and 190 denotes a cathode.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail with reference to the following embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
In a preferred embodiment of the present invention, the OLED device according to the invention comprises a hole transport layer, which may preferably be selected from known or unknown materials, particularly preferably from the following structures, without representing the present invention being limited to the following structures:
Figure BDA0002922953330000691
in a preferred embodiment of the present invention, the hole transport layer contained in the OLED device of the present invention comprises one or more p-type dopants. Preferred p-type dopants of the present invention are, but do not represent a limitation of the present invention to:
Figure BDA0002922953330000692
in a preferred embodiment of the present invention, the electron transport layer may be selected from at least one of the compounds ET-1 to ET-13, but does not represent that the present invention is limited to the following structures:
Figure BDA0002922953330000701
the electron transport layer may be formed from an organic material in combination with one or more n-type dopants (e.g., LiQ).
The present invention also provides a preparation comprising the organometallic complex and a solvent, and the solvent used is not particularly limited, and an unsaturated hydrocarbon solvent such as toluene, xylene, mesitylene, tetrahydronaphthalene, decahydronaphthalene, bicyclohexyl, n-butylbenzene, sec-butylbenzene, tert-butylbenzene, etc., a halogenated saturated hydrocarbon solvent such as carbon tetrachloride, chloroform, dichloromethane, dichloroethane, chlorobutane, bromobutane, chloropentane, bromopentane, chlorohexane, bromohexane, chlorocyclohexane, bromocyclohexane, etc., a halogenated unsaturated hydrocarbon solvent such as chlorobenzene, dichlorobenzene, trichlorobenzene, etc., an ether solvent such as tetrahydrofuran, tetrahydropyran, etc., an ester solvent such as alkyl benzoate, etc., which are well known to those skilled in the art can be used. The preparation is directly used for preparing photoelectric devices.
According to the literature and the relevant technical reserves of the inventors, the synthesis of organometallic complexes of the formula (I) is referred to, for example, as follows:
example 1: synthesis of Compound 1
Figure BDA0002922953330000702
(1) S-1(10 mmol) and S-2(11 mmol) were completely dissolved in tetrahydrofuran/water (2:1, 80 ml) in a round-bottom flask under nitrogen atmosphere, potassium carbonate (5 g), palladium tetrakis (triphenylphosphine) acetate (0.1 g) were added, and the mixture was heated under reflux for 10-12 hours. After cooling to room temperature, acetic acid (2 ml) was added and stirred for 1 hour, the upper tetrahydrofuran layer was separated, filtered through celite, and the solvent was concentrated in vacuo and then extracted with petroleum ether: ethyl acetate (20: 1-2: 1) was purified and separated as eluent on a silica gel column to give S-3 (yield 82%), LC-MS, 692.4.
(2) In a round-bottom flask, S-1(10 mmol), nickel chloride (10 mmol) and acetic acid (8 ml) were heated under nitrogen atmosphere to reflux for 3 days. After cooling to room temperature, filtration gave a yellow solid, which was purified using petroleum ether: dichloromethane (20: 1-2: 1) was purified and isolated as eluent on silica gel column to give compound 1 (73% yield), which was further purified by vacuum sublimation. LC-MS: theory 885.31, found: 885.3, respectively; elemental analysis C65.09; h is 4.89; n is 3.16; actually measuring: c, 65.00; h is 5.03; and N is 3.11.
Example 2: synthesis of Compound 2
Figure BDA0002922953330000711
The synthesis procedure of compound 2 was similar to that of compound 1, with a final metal complex formation yield of 76%, LC-MS: theory 941.37, found: 941.3, respectively; elemental analysis C: 66.31; h is 5.46; 2.97 of N; actually measuring: c, 66.26; h, 5.48; and N is 3.02.
Example 3: synthesis of Compound 3
Figure BDA0002922953330000712
The synthesis procedure of compound 3 was similar to that of compound 1, with a final metal complex formation yield of 75%, LC-MS: theory 944.36, found: 944.4, respectively; elemental analysis C: 66.09; h is 5.44; n is 4.45; actually measuring: c, 66.12; h, 5.48; n: 4.56.
Example 4: synthesis of Compound 4
Figure BDA0002922953330000713
The synthesis procedure of compound 4 was similar to that of compound 1, with a final metal complex formation yield of 75%, LC-MS: theory 972.43, found: 972.4, respectively; elemental analysis C: 67.88; h is 6.11; n is 4.32; actually measuring: 67.93; h is 6.18; n is 4.31.
Example 5: synthesis of Compound 5
Figure BDA0002922953330000721
The synthesis procedure of compound 5 was similar to that of compound 1, with a final metal complex formation yield of 73%, LC-MS: theory 966.38, found: 966.4, respectively; elemental analysis C: 68.31; h is 5.52; n is 4.34; actually measuring: 68.26 parts of C; h is 5.57; n: 4.26.
Example 6: synthesis of Compound 6
Figure BDA0002922953330000722
The synthesis procedure of compound 6 was similar to that of compound 1, with a final metal complex formation yield of 71%, LC-MS: theory 908.36, found: 908.4, respectively; elemental analysis C: 64.74; h is 5.66; n is 4.62; actually measuring: c, 64.70; h is 5.73; and N is 4.57.
Example 7: synthesis of Compound 7
Figure BDA0002922953330000723
The synthesis procedure of compound 7 was similar to that of compound 1, with a yield of 79% of the final metal complex formed, LC-MS: theory 936.43, found: 936.4; elemental analysis C: 66.65; h is 6.35; n is 4.48; actually measuring: 66.69; h is 6.46; n is 4.42.
Example 8: synthesis of Compound 8
Figure BDA0002922953330000724
The synthesis procedure of compound 8 was similar to that of compound 1, with a final metal complex formation yield of 72%, LC-MS: theory 968.44, found: 968.4, respectively; elemental analysis C: 64.44; h is 6.55; n is 4.34; actually measuring: c, 64.47; 6.640 is the ratio of H to H; and 4.35 of N.
Example 9: synthesis of Compound 9
Figure BDA0002922953330000731
Synthesis of Compound 9S-3 is analogous to S-3 in Compound 1;
the synthesis steps of S-4 are as follows: compound S-3(10 mmol) was dissolved in acetic acid (100 ml), 2 ml of concentrated sulfuric acid was added dropwise, and the mixture was heated under reflux for 12 hours. After concentration and cooling, the mixture was poured into ice water and extracted with dichloromethane (50 ml X2). The dichloromethane layer is washed by saturated saline solution and saturated ammonium chloride aqueous solution and then concentrated to be dry, and crude products are treated by petroleum ether: purifying and separating ethyl acetate (20: 1-2: 1) serving as eluent on a silica gel column to obtain a compound S-4 (yield is 87%); LC-MS: 619.3; the yield of the finally formed metal complex compound 9 was 83%, LC-MS: theory 812.27, found: 812.3, respectively; elemental analysis C: 62.06; h is 4.84; n is 5.17; actually measuring: c, 62.10; h is 4.93; and 5.16 of N.
Example 10: synthesis of Compound 10
Figure BDA0002922953330000732
The synthesis procedure of compound 10 was similar to that of compound 9, with a final metal complex formation yield of 78%, LC-MS: theory 904.33, found: 904.3, respectively; elemental analysis C65.03; h is 5.23; n is 4.64; actually measuring: c, 65.12; h is 5.27; n: 4.68.
Example 11: synthesis of Compound 11
Figure BDA0002922953330000733
The synthesis procedure of compound 11 was similar to that of compound 1, with a final metal complex formation yield of 70%, LC-MS: theory 957.4, found: 957.4, respectively; elemental analysis C: 66.45; h is 5.79; 2.92 of N; actually measuring: 66.42; h is 5.88; and N is 3.03.
Example 12: synthesis of Compound 12
Figure BDA0002922953330000741
The synthesis procedure of compound 12 was similar to that of compound 1, with a final metal complex formation yield of 76%, LC-MS: theory 988.46, found: 988.5, respectively; elemental analysis C: 67.99; h is 6.42; n is 4.25; actually measuring: 68.04; h is 6.47; n is 4.23.
Example 13: synthesis of Compound 13
Figure BDA0002922953330000742
The synthesis procedure of compound 13 was similar to that of compound 1, with a final metal complex formation yield of 70%, LC-MS: theory 847.37, found: 847.4, respectively; elemental analysis C: 73.61; h is 7.01; n is 4.95; actually measuring: c, 73.65; h is 7.07; and N is 4.93.
Example 14: synthesis of Compound 14
Figure BDA0002922953330000743
The synthesis procedure of compound 14 was similar to compound 1, with a final metal complex formation yield of 70%, LC-MS: theory 854.32, found: 854.3, respectively; elemental analysis C: 63.22; h is 5.31; n is 4.91; actually measuring: 63.27; h is 5.37; and 4.90 percent of N.
A P-doped material P-1 to P-5 is vapor-deposited on the surface or anode of an ITO glass having a light emitting area of 2mm x 2mm or the P-doped material is co-vapor-deposited with a compound shown in the table at a concentration of 1% to 50% to form a Hole Injection Layer (HIL) of 5 to 100nm and a Hole Transport Layer (HTL) of 5 to 200nm, and then a light emitting layer (EML) (which may contain the compound) of 10 to 100nm is formed on the hole transport layer, and finally an Electron Transport Layer (ETL) of 20 to 200nm and a cathode of 50 to 200nm are sequentially formed using the compound, and if necessary, an Electron Blocking Layer (EBL) is added between the HTL and the EML, and an Electron Injection Layer (EIL) is added between the ETL and the cathode, thereby manufacturing an organic light emitting device.
OLED device examples:
the structure of the bottom-emitting OLED device is specifically implemented on ITO-containing glass, the HIL is HT-1: P-3(95:5 v/v%), and the thickness is 10 nanometers; HTL is HT-1, and the thickness is 90 nanometers; EBL is HT-10, thickness is 10 nm, EML is GH-1: organometallic complex (95:5 v/v%), thickness is 35 nm, ETL is ET-13: LiQ (50:50 v/v%) with a thickness of 35 nm, and then evaporation of cathode Al at 70 nm.
Figure BDA0002922953330000751
According to the above device embodiments, the External Quantum Efficiency (EQE), the turn-on voltage, the light emission peak, and the like of the OLED device are shown in table 1 below.
TABLE 1
Examples Compound (I) Lighting voltage (volt) EQE Luminous peak (nanometer) LT90 (hours)
Comparison device 1 GD-1 2.8 20.5% 515 150
Comparison device 2 RD-1 2.5 18.7% 625 240
Device example 1 Compound 1 2.7 21.3% 520 170
Device example 2 Compound 2 2.6 22.2% 520 230
Device example 3 Compound 3 2.8 21.8% 522 180
Device example 4 Compound 4 2.6 21.6% 516 205
Device example 5 Compound 5 2.6 22.9% 523 195
Device example 6 Compound 6 2.6 23.1% 521 235
Device example 7 Compound 7 2.6 23.3% 525 220
Device example 8 Compound 8 2.8 22.4 518 211
Device example 9 Compound 9 2.7 23.6% 520 250
Device example 10 Compound 10 2.5 22.1% 625 280
Device example 11 Compound 11 2.4 22.3% 623 272
Device example 12 Compound 12 2.4 25.1% 620 260
Device example 13 Compound 13 2.6 22.7% 530 245
Device example 14 Compound 14 2.7 21.4% 518 155
According to the invention, platinum or palladium metal is formed into a novel organic metal compound, the novel organic metal compound is found to have good luminous property, and the novel organic metal compound is used as a guest material to be doped into a host material GH-1, so that an OLED device with the external quantum efficiency of 21.3-25.1% is obtained. In bottom-emitting OLED devices without any light extraction means, the external quantum efficiency exceeded 20%, indicating that the organometallic complexes of the present invention have an internal quantum efficiency in OLED devices approaching 100%. Meanwhile, the service life LT90 of the device reaches 280 hours at most, and compared with a reference green luminescent material GD-1, the efficiency and the service life of the device are improved. Device examples 10 to 12 are red phosphorescent OLED devices, and efficiencies exceeding 22% in external quantum efficiency were obtained. Device 13 also achieves a green device with an external quantum efficiency of over 22% with palladium metal complexes. The organic metal compound can obtain a green and red phosphorescent OLED device with long service life and high efficiency, and meanwhile, the platinum or palladium metal earth crust has rich content, has the potential of replacing iridium metal organic metal complexes, and has good commercial application prospect.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.

Claims (14)

1. An organometallic complex having a structure represented by the formula (I):
Figure FDA0002922953320000011
wherein, in formula (I), M is platinum (Pt) or palladium (Pd); at least one of X1 to X5 is independently selected from the group consisting of a bond, O, S, N-R6, B-R6, P-R6, O ═ P-R6, (C-R6R7) n, C ═ O, S ═ O, S (═ O)2Or one of Si-R6R 7; x6 to X7 are absent or independently selected from the group consisting of a bond, O, S, N-R6, B-R6, P-R6, O ═ P-R6, (C-R6R7) n, C ═ O, S ═ O, S (═ O)2Or one of Si-R6R 7; t is independently selected from one of N-R6, B-R6, P-R6, O-P-R6, C-R6R7 or Si-R6R 7; y1 to Y13 are independently selected from C or N; l1 is independently selected from a bond, or C O, S O, S (═ O)2L2 is independently selected from chemical bond, or one of O, N-R6 and S, and when L1 and L2 are chemical bonds at the same time, Y1 or Y7 is directly bonded to metal M; rings CY1 to CY5 each independently form a C6 to C40 ring group and a C1 to C40 heterocyclic group with the corresponding Y1 to Y13, CY6 being a five-membered ring; r1 to R7 are each independently selected from hydrogen, deuterium, CN, halogen, hydroxyl, hydrazino, amidino, amido, substituted or unsubstituted C1 to C60 alkyl, substituted or unsubstituted C2 to C60 alkenyl, substituted or unsubstituted C1 to C60 alkoxy, substituted or unsubstituted C1 to C60 cycloalkyl, substituted or unsubstituted C1 to C60 heteroalkyl, substituted or unsubstituted C6 to C60 aryl, substituted or unsubstituted C1 to C60 heteroaryl, substituted or unsubstituted C1 to C60 amine, substituted or unsubstituted C1 to C60 silicon, substituted or unsubstituted C6 to C60 aromatic fused ring, substituted or unsubstituted C1 to C60 heteroaromatic fused ring; r1 to R7 each independently may be partially or fully deuterated, each independently may be partially or fully fluorinated; r1 to R7 may be unsubstituted or polysubstituted according to valence bond rules; n is an integer of 1 to 6.
2. The organometallic complex according to claim 1, wherein two of the atoms bonded to the metal M form covalent bonds and two of the atoms form coordinate bonds.
3. The organometallic complex according to claims 1 to 2, characterized in that in the formula (I)
Figure FDA0002922953320000012
Figure FDA0002922953320000021
Moieties are independently selected from one of the following representative groups:
Figure FDA0002922953320000022
wherein X8 is independently selected from O, S, N-R6, B-R6, P-R6, O ═ P-R6, C-R6R7, C ═ O, S ═ O, S (═ O)2Or one of Si-R6R 7; y is N or C-R8, R6, R7, R8 are the same as R1 in claim 1, and when R8 is 2 or more, the same or different from each other, adjacent C-R8 may form a ring.
4. The organometallic complex according to claims 1 to 2, characterized in that in the formula (I)
Figure FDA0002922953320000023
Moieties are independently selected from one of the following representative groups:
Figure FDA0002922953320000024
wherein T, Y3 and Y4 are the same as defined in claim 1, Y is N or C-R8, R6, R7 and R8 are the same as defined in claim 1 for R1, and when R8 is 2 or more, they are the same as or different from each other, and adjacent R8 may form a ring.
5. The organometallic complex according to claims 1 to 2, characterized in that in the formula (I)
Figure FDA0002922953320000031
The moiety is typically selected from one of the following groups:
Figure FDA0002922953320000032
wherein Y11 is the same as in claim 1; x9 and X10 are independently selected from one of O, S, N-R6, B-R6, P-R6, O-P-R6, C-R6R7, C-O, S-O, S (═ O)2, or Si-R6R 7; y is N or C-R8, R6, R7, R8 are the same as R1 in claim 1, and when R8 is 2 or more, the same or different from each other, adjacent R8 may form a ring.
6. The organometallic complex according to claims 1 to 2, characterized in that in the formula (I)
Figure FDA0002922953320000033
Moieties are independently selected from one of the following representative groups:
Figure FDA0002922953320000034
wherein Y8 is the same as in claim 1; x11 is independently selected from one of O, S, N-R6, B-R6, P-R6, O ═ P-R6, C-R6R7, C ═ O, S ═ O, S (═ O)2, or Si — R6R 7; y is N or C-R8, R6, R7, R8 are the same as R1 in claim 1, and when R8 is 2 or more, the same or different from each other, adjacent R8 may form a ring.
7. The organometallic complex according to any one of claims 1 to, characterized in that the organometallic complex formula (I) is selected from one of the following representative structures:
Figure FDA0002922953320000041
Figure FDA0002922953320000051
Figure FDA0002922953320000061
Figure FDA0002922953320000071
Figure FDA0002922953320000081
Figure FDA0002922953320000091
Figure FDA0002922953320000101
Figure FDA0002922953320000111
Figure FDA0002922953320000121
Figure FDA0002922953320000131
Figure FDA0002922953320000141
Figure FDA0002922953320000151
Figure FDA0002922953320000161
Figure FDA0002922953320000171
Figure FDA0002922953320000181
Figure FDA0002922953320000191
Figure FDA0002922953320000201
Figure FDA0002922953320000211
Figure FDA0002922953320000221
Figure FDA0002922953320000231
Figure FDA0002922953320000241
Figure FDA0002922953320000251
Figure FDA0002922953320000261
Figure FDA0002922953320000271
Figure FDA0002922953320000281
Figure FDA0002922953320000291
Figure FDA0002922953320000301
Figure FDA0002922953320000311
Figure FDA0002922953320000321
Figure FDA0002922953320000331
Figure FDA0002922953320000341
Figure FDA0002922953320000351
Figure FDA0002922953320000361
Figure FDA0002922953320000371
Figure FDA0002922953320000381
Figure FDA0002922953320000391
Figure FDA0002922953320000401
Figure FDA0002922953320000411
Figure FDA0002922953320000421
Figure FDA0002922953320000431
Figure FDA0002922953320000441
Figure FDA0002922953320000451
Figure FDA0002922953320000461
Figure FDA0002922953320000471
Figure FDA0002922953320000481
Figure FDA0002922953320000491
Figure FDA0002922953320000501
Figure FDA0002922953320000511
Figure FDA0002922953320000521
Figure FDA0002922953320000531
Figure FDA0002922953320000541
Figure FDA0002922953320000551
Figure FDA0002922953320000561
Figure FDA0002922953320000571
Figure FDA0002922953320000581
Figure FDA0002922953320000591
Figure FDA0002922953320000601
Figure FDA0002922953320000611
Figure FDA0002922953320000621
Figure FDA0002922953320000631
Figure FDA0002922953320000641
Figure FDA0002922953320000651
Figure FDA0002922953320000661
8. a formulation comprising an organometallic complex according to any of claims 1 to 7 and at least one solvent.
9. A formulation according to claim 8, wherein the organometallic complex and the solvent are formulated in the form of a solvent, and the solvent used is not particularly limited, and a halogenated saturated hydrocarbon solvent such as toluene, xylene, mesitylene, tetralin, decalin, bicyclohexane, n-butylbenzene, sec-butylbenzene, tert-butylbenzene, carbon tetrachloride, chloroform, dichloromethane, dichloroethane, chlorobutane, bromobutane, chloropentane, bromopentane, chlorohexane, bromohexane, chlorocyclohexane, bromocyclohexane and the like, a halogenated unsaturated hydrocarbon solvent such as chlorobenzene, dichlorobenzene, trichlorobenzene and the like, an ether solvent such as tetrahydrofuran, tetrahydropyran and the like, an ester solvent such as alkyl benzoate and the like, which are known to those skilled in the art can be used.
10. An organic optoelectronic device, comprising:
a first electrode;
a second electrode facing the first electrode;
the organic functional layer is clamped between the first electrode and the second electrode;
wherein the organic functional layer comprises the organometallic complex according to any one of claims 1 to 7.
11. An organic photoelectric element comprising a cathode layer, an anode layer and an organic layer, the organic layer comprising at least one of a hole injection layer, a hole transport layer, a light emitting layer or an active layer, an electron injection layer, and an electron transport layer, wherein: an organometallic complex according to claims 1 to 7 contained in any one layer of the device.
12. The Organic photoelectric Element according to claim 7, wherein the Organic photoelectric Element is an Organic photovoltaic device, an Organic Light Emitting Device (OLED), an Organic Solar Cell (OSC), an electronic paper (e-paper), an Organic Photoreceptor (OPC), an Organic Thin Film Transistor (OTFT), an Organic Memory device (Organic Memory Element), a lighting device, or a display device.
13. The organic photoelectric element according to claims 10 to 12, wherein the light-emitting layer contains the organometallic complex and a corresponding host material, wherein the organometallic complex is present in an amount of 1 to 50% by mass, and the host material is not limited.
14. A display or lighting device comprising the organic photoelectric element according to any one of claims 10 to 13.
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