WO2009157429A1 - 燐光発光性組成物及び同組成物を用いてなる発光素子 - Google Patents
燐光発光性組成物及び同組成物を用いてなる発光素子 Download PDFInfo
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- WO2009157429A1 WO2009157429A1 PCT/JP2009/061366 JP2009061366W WO2009157429A1 WO 2009157429 A1 WO2009157429 A1 WO 2009157429A1 JP 2009061366 W JP2009061366 W JP 2009061366W WO 2009157429 A1 WO2009157429 A1 WO 2009157429A1
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- 0 C*(N([Al])[Al](*)C(C)(C)N(C)[Al]*)[Al]* Chemical compound C*(N([Al])[Al](*)C(C)(C)N(C)[Al]*)[Al]* 0.000 description 3
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Definitions
- the present invention relates to a phosphorescent composition and a light emitting device using the composition.
- a light-emitting material used for a light-emitting layer of a light-emitting element an element using a compound that emits light from a triplet excited state (hereinafter sometimes referred to as a “phosphorescent compound”) has high emission efficiency.
- a phosphorescent compound is used for the light emitting layer, a composition obtained by adding the compound to a matrix is usually used as the light emitting material.
- the matrix polyvinyl carbazole is used because a thin film can be formed by coating (Patent Document 1).
- this compound has a high energy level of the lowest unoccupied molecular orbital (hereinafter referred to as “LUMO”), it is difficult to inject electrons.
- LUMO lowest unoccupied molecular orbital
- a conjugated polymer compound such as polyfluorene has a low LUMO, a low driving voltage can be realized relatively easily when it is used as a matrix.
- T 1 energy since such a conjugated polymer compound has a low minimum triplet excitation energy (hereinafter referred to as “T 1 energy”), it is used as a matrix for emission of light having a wavelength shorter than that of green. It is not suitable for (patent document 2).
- Non-Patent Document 1 a light-emitting material including polyfluorene that is a conjugated polymer and a triplet light-emitting compound has low light emission efficiency because the light emitted from the triplet light-emitting compound is weak.
- an object of the present invention is to provide a material having excellent luminous efficiency when used in a light emitting element or the like.
- the present invention firstly provides the following formulas (1-1), (1-2), (1-3) and (1-4): (In the formula, R represents a hydrogen atom or a substituent. A plurality of R may be the same or different.) A composition comprising a compound having a residue of at least two kinds of nitrogen-containing polycyclic compounds selected from the group consisting of nitrogen-containing polycyclic compounds represented by the formula: and a phosphorescent compound. The present invention secondly provides at least 2 selected from the group consisting of the nitrogen-containing polycyclic compounds represented by the formulas (1-1), (1-2), (1-3) and (1-4). Provided is a polymer compound containing a residue of a species of nitrogen-containing polycyclic compound and a residue of a phosphorescent compound. Thirdly, the present invention provides a thin film and a light-emitting device using the composition or the polymer compound. Fourthly, the present invention provides a planar light source, a display device, and illumination provided with the light emitting element.
- the composition and polymer compound of the present invention (hereinafter referred to as “the composition of the present invention”) have high luminous efficiency. Therefore, the composition and the like of the present invention are excellent in luminous efficiency when used in the production of a light emitting device or the like.
- the composition of the present invention usually has a relatively excellent light-emitting property in light emission in a relatively short wavelength region. This is because the T 1 energy of the nitrogen-containing polycyclic compound and the polymer compound of the present invention contained in the composition of the present invention is large.
- composition of the present invention has a relatively low LUMO energy level, is easy to inject electrons, has a relatively high energy level of the highest occupied molecular orbital (hereinafter referred to as “HOMO”), and injects holes. easy.
- HOMO highest occupied molecular orbital
- the composition of the present invention has the formulas (1-1), (1-2), (1-3) and (1-4) (hereinafter referred to as “formulas (1-1) to (1-4)”).
- the residues of the compounds represented by the formulas (1-1) to (1-4) are R in the compounds represented by the formulas (1-1) to (1-4).
- the “polymer compound” means a compound in which at least two identical structures (repeating units) are present in the compound.
- the compound having a residue of at least two kinds of nitrogen-containing polycyclic compounds is at least selected from the group consisting of compounds represented by the formulas (1-1), (1-2) and (1-3). More preferably, it is a compound having a residue of two types of nitrogen-containing polycyclic compounds, from the group consisting of compounds represented by the formulas (1-1), (1-2) and (1-3). A compound having a residue of at least three selected nitrogen-containing polycyclic compounds is particularly preferable.
- the compound having a residue of at least two kinds of nitrogen-containing polycyclic compounds may be a polymer compound, in which case the residue of the nitrogen-containing polycyclic compound is used as a main chain and / or a side chain.
- the polymer compound is preferably a polymer compound having a repeating unit containing a residue of a nitrogen-containing polycyclic compound represented by the formulas (1-1) to (1-4); In addition to the repeating unit containing the residue of the nitrogen-containing polycyclic compound represented by 1-1) to (1-4), an aromatic ring, a heterocyclic ring containing 5 or more members containing a hetero atom, an aromatic amine, And a polymer compound having a repeating unit containing any one of structures selected from the structures represented by formula (4) described later.
- R represents a hydrogen atom or a substituent, and preferably at least one of a plurality of R is a substituent, more preferably a plurality of R At least two of them are substituents, and more preferably all of a plurality of Rs are substituents. When two or more R exists, they may be the same or different.
- substituents examples include a halogen atom, an alkyl group, an alkoxy group, an alkylthio group, an aryl group which may have a substituent, an aryloxy group, an arylthio group, an arylalkyl group, an arylalkyloxy group, an arylalkylthio group, Acyl group, acyloxy group, amide group, acid imide group, imine residue, substituted amino group, substituted silyl group, substituted silyloxy group, substituted silylthio group, substituted silylamino group, monovalent complex which may have a substituent Ring group, heteroaryl group which may have a substituent, heteroaryloxy group, heteroarylthio group, arylalkenyl group, arylethynyl group, substituted carboxyl group, cyano group and the like, preferably an alkyl group , An alkoxy group, an aryl group which may have a substituent, and
- the N-valent heterocyclic group (N is 1 or 2) is a remaining atomic group obtained by removing N hydrogen atoms from a heterocyclic compound, and the same applies in this specification.
- the monovalent heterocyclic group is preferably a monovalent aromatic heterocyclic group.
- At least one R is an alkyl group, an alkoxy group, an aryl group which may have a substituent, or a heteroaryl group which may have a substituent. More preferably, at least one R is an alkyl group having 3 to 10 carbon atoms or an alkoxy group having 3 to 10 carbon atoms.
- At least one R is a substituent having a total number of atoms other than hydrogen atoms of 3 or more, more preferably a substituent having a total number of atoms other than hydrogen atoms of 5 or more. It is particularly preferable that the total number of atoms other than is a substituent having 7 or more.
- at least one R is preferably a substituent, and more preferably, both two R are substituents.
- a plurality of R may be the same or different.
- Examples of the compound having a residue of at least two types of nitrogen-containing polycyclic compounds include the following formula (A-1) or (A-2): (Wherein Z 1 and Z 2 are each independently a nitrogen-containing polycyclic compound represented by the formula (1-1), (1-2), (1-3) or (1-4)).
- Y 1 represents a residue, —C (R a ) (R b ) —, —N (R c ) —, —O—, —Si (R d ) (R e ) —, —P (R f ) — Or —S—, R a to R f each independently represents a hydrogen atom or a substituent, m is an integer of 0 to 5.
- Y 1 When a plurality of Y 1 are present, they are the same.
- Y 2 represents an arylene group which may have a substituent, n is an integer of 1 to 5. When a plurality of Y 2 are present, they may be the same. May be different.) And a compound having a residue thereof.
- Examples of the substituent represented by R a to R f include an alkyl group, alkoxy group, alkylthio group, aryl group, aryloxy group, arylthio group, arylalkyl group, arylalkoxy group, arylalkylthio group, arylalkenyl group, aryl Examples include alkynyl group, amino group, substituted amino group, silyl group, substituted silyl group, silyloxy group, substituted silyloxy group, monovalent heterocyclic group, and halogen atom.
- Examples of the aryl group represented by R a to R f include a phenyl group and a C 1 to C 12 alkoxyphenyl group (“C 1 to C 12 alkoxy” means that the alkoxy moiety has 1 to 12 carbon atoms. The same shall apply hereinafter.), C 1 -C 12 alkylphenyl group (“C 1 -C 12 alkyl” means that the alkyl moiety has 1 to 12 carbon atoms. The same shall apply hereinafter.
- the monovalent heterocyclic group represented by R a to R f means a remaining atomic group obtained by removing one hydrogen atom from a heterocyclic compound.
- the heterocyclic compound is an organic compound having a cyclic structure in which the elements constituting the ring include not only carbon atoms but also hetero atoms such as oxygen atoms, sulfur atoms, nitrogen atoms, and phosphorus atoms in the ring. The thing included in.
- the compound having a residue of at least two kinds of nitrogen-containing polycyclic compounds is a polymer compound, it is represented by the formula (A-1) or (A-2) from the viewpoint of T 1 energy. It is preferable that it is a high molecular compound which has a repeating unit containing the residue of the compound made.
- the compound having a residue of at least two kinds of nitrogen-containing polycyclic compounds is represented by the following formula (A-3) from the viewpoint of T 1 energy:
- RING represents the residues of at least two nitrogen-containing polycyclic compounds selected from the group consisting of the nitrogen-containing polycyclic compounds represented by the above formulas (1-1) to (1-4).
- the ring Z is a cyclic structure containing a carbon atom, X 1 and X 2.
- X 1 and X 2 each independently represent —C (R) ⁇ , wherein R is as defined above. Have the same meaning.
- examples of the cyclic structure include an aromatic ring which may have a substituent and a non-aromatic ring which may have a substituent, such as a benzene ring and a heterocyclic ring.
- An alicyclic hydrocarbon ring, a ring formed by condensing a plurality of these rings, and a ring in which a part of hydrogen atoms of these rings are substituted are preferable.
- the residues of the compounds represented by the formulas (A-1) to (A-3) mean groups obtained by removing part or all of the hydrogen atoms and R in the compounds.
- the compound having the residue of at least two kinds of nitrogen-containing polycyclic compounds can be adjusted in energy level by using the residues of nitrogen-containing polycyclic compounds having different HOMO / LUMO. Excellent injection and transportability. Further, in a preferred embodiment, there is a tendency that amorphousness is improved from the viewpoint of improvement in durability in oxidation / reduction by combining donor properties and acceptor properties and symmetry, and film formability is improved.
- the compound having a residue of at least two kinds of nitrogen-containing polycyclic compounds may contain other partial structures.
- the type of the other partial structure is preferably different depending on whether it is present at the terminal.
- a conjugated polyvalent group is preferred in terms of LUMO or HOMO energy levels.
- a group include a divalent aromatic group and a trivalent aromatic group.
- the aromatic group is a group derived from an organic compound exhibiting aromaticity.
- examples of such an aromatic group include groups in which n ′ (n ′ is 2 or 3) hydrogen atoms are replaced with a bond from an aromatic ring such as benzene, naphthalene, anthracene, pyridine, quinoline, and isoquinoline. .
- P ring and Q ring are alkyl group, alkoxy group, alkylthio group, aryl group, alkenyl group, alkynyl group, aryloxy group, arylthio group, arylalkyl group, arylalkoxy group, arylalkylthio group.
- substituents examples include alkyl group, alkoxy group, alkylthio group, aryl group, aryloxy group, arylthio group, arylalkyl group, arylalkoxy group, arylalkylthio group, arylalkenyl group, arylalkynyl group, amino group, substituted amino group Selected from the group consisting of a group, silyl group, substituted silyl group, halogen atom, acyl group, acyloxy group, imine residue, amide group, acid imide group, monovalent heterocyclic group, carboxyl group, substituted carboxyl group and cyano group
- the substituents are preferred.
- the P ring and the Q ring each independently represent an aromatic ring, but the P ring may or may not exist.
- Two bonds are present on the P ring or Q ring, respectively, when the P ring is present, and on the 5-membered ring or 6-membered ring containing Y, or on the Q ring, respectively, when the P ring is absent.
- Arylalkoxy group, arylalkylthio group, arylalkenyl group, arylalkynyl group, amino group, substituted amino group, silyl group, substituted silyl group, halogen atom, acyl group, acyloxy group, imine residue, amide group, acid imide group It may have a substituent selected from the group consisting of a monovalent heterocyclic group, a carboxyl group, a substituted carboxyl group and a cyano group.
- substituents examples include alkyl group, alkoxy group, alkylthio group, aryl group, aryloxy group, arylthio group, arylalkyl group, arylalkoxy group, arylalkylthio group, arylalkenyl group, arylalkynyl group, amino group, substituted amino group Selected from the group consisting of a group, silyl group, substituted silyl group, halogen atom, acyl group, acyloxy group, imine residue, amide group, acid imide group, monovalent heterocyclic group, carboxyl group, substituted carboxyl group and cyano group
- the substituents are preferred.
- R 0 and R 2 to R 31 are each independently a hydrogen atom, alkyl group, alkoxy group, alkylthio group, aryl group, alkenyl group, alkynyl group, aryloxy group, arylthio group, arylalkyl group, arylalkoxy group Represents a group, arylalkylthio group, arylalkenyl group, arylalkynyl group, amino group, substituted amino group, silyl group, substituted silyl group, silyloxy group, substituted silyloxy group, monovalent heterocyclic group or halogen atom.
- alkyl group, alkoxy group, alkylthio group, aryl group, aryloxy group, arylthio group, arylalkyl group, arylalkoxy group, arylalkylthio group, arylalkenyl group, arylalkynyl group, amino group, substitution Amino group, silyl group, substituted silyl group, silyloxy group, substituted silyloxy group, monovalent heterocyclic group, and halogen atom are preferred, alkyl group, alkoxy group, alkylthio group, aryl group, aryloxy group, arylthio group, arylalkyl Group, arylalkoxy group, and monovalent heterocyclic group are preferable, alkyl group, alkoxy group, aryl group, and monovalent heterocyclic group are more preferable, and alkyl group and aryl group are particularly preferable.
- Examples of the structure represented by the above formula (4) include the following formula (4-1), (4-2) or (4-3): (In the formula, A ring, B ring, and C ring each independently represent an aromatic ring.
- Formulas (4-1), (4-2), and (4-3) represent an alkyl group, an alkoxy group, Alkylthio group, aryl group, aryloxy group, arylthio group, arylalkyl group, arylalkoxy group, arylalkylthio group, arylalkenyl group, arylalkynyl group, amino group, substituted amino group, silyl group, substituted silyl group, halogen atom, It may have a substituent selected from the group consisting of an acyl group, an acyloxy group, an imine residue, an amide group, an acid imide group, a monovalent heterocyclic group, a carboxyl group, a substituted carboxyl group and a cyano group.
- D ring, E ring, F ring and G ring are each independently an alkyl group, alkoxy group, alkylthio group, aryl group, aryloxy group, arylthio group, arylalkyl group, arylalkoxy group, arylalkylthio group.
- An aromatic ring which may have a substituent selected from the group consisting of a carboxyl group, a substituted carboxyl group and a cyano group, Y represents the same meaning as described above. The structure represented by is mentioned.
- a ring, B ring, C ring, D ring, E ring, F ring And an aromatic ring represented by G ring for example, an aromatic ring such as a benzene ring, naphthalene ring, anthracene ring, tetracene ring, pentacene ring, pyrene ring, phenanthrene ring; Examples thereof include heteroaromatic rings such as a pyridine ring, a bipyridine ring, a phenanthroline ring, a quinoline ring, an isoquinoline ring, a thiophene ring, a furan ring, and a pyrrole ring. These aromatic rings may have the substituent.
- Ar 6 , Ar 7 , Ar 8 and Ar 9 each independently represent an arylene group or a divalent heterocyclic group.
- Ar 10 , Ar 11 and Ar 12 each independently represent an aryl group or a monovalent complex.
- Ar 6 to Ar 12 may have a substituent, x and y each independently represent 0 or 1, and 0 ⁇ x + y ⁇ 1.
- the aromatic amine structure of the structure represented by these is mentioned.
- the arylene group represented by Ar 6 , Ar 7 , Ar 8 , Ar 9 is an atomic group remaining after removing two hydrogen atoms from an aromatic hydrocarbon.
- the aromatic hydrocarbon includes a compound having a condensed ring and a compound in which two or more independent benzene rings or condensed rings are bonded directly or via a vinylene group.
- the divalent heterocyclic group represented by Ar 6 , Ar 7 , Ar 8 , Ar 9 is a remaining atomic group obtained by removing two hydrogen atoms from a heterocyclic compound.
- the divalent heterocyclic group usually has 4 to 60 carbon atoms.
- a heterocyclic compound means a compound in which an element that constitutes a ring includes not only a carbon atom but also hetero atoms such as oxygen, sulfur, nitrogen, phosphorus, and boron in the ring among organic compounds having a cyclic structure. To do.
- a divalent aromatic heterocyclic group is preferable.
- the aryl group represented by Ar 10 , Ar 11 , Ar 12 is an atomic group remaining after removing one hydrogen atom from an aromatic hydrocarbon.
- the aromatic hydrocarbon is as described above.
- the monovalent heterocyclic group represented by Ar 10 , Ar 11 , Ar 12 means the remaining atomic group obtained by removing one hydrogen atom from a heterocyclic compound.
- the carbon number of the monovalent heterocyclic group is usually 4 to 60.
- the heterocyclic compound is as described above.
- As the monovalent heterocyclic group a monovalent aromatic heterocyclic group is preferable.
- the polystyrene-equivalent weight average molecular weight of the compound is preferably 3 ⁇ 10 2 or more from the viewpoint of film formability. 3 ⁇ 10 2 to 1 ⁇ 10 7 are more preferable, 1 ⁇ 10 3 to 1 ⁇ 10 7 are more preferable, and 1 ⁇ 10 4 to 1 ⁇ 10 7 are particularly preferable.
- the compound having a residue of at least two kinds of nitrogen-containing polycyclic compounds can be used in a wide emission wavelength region, and the T 1 energy value of the compound is preferably 3.0 eV or more, More preferably, it is 3.2 eV or more, more preferably 3.4 eV or more, and particularly preferably 3.5 eV or more. Usually, the upper limit is 5.0 eV.
- the absolute value of the LUMO energy level of the compound having a residue of at least two kinds of nitrogen-containing polycyclic compounds is preferably 1.5 eV or more, more preferably 1.7 eV or more. It is more preferably 9 eV or more, particularly preferably 2.0 eV or more, and particularly preferably 2.2 eV or more. In general, the upper limit is 4.0 eV.
- the absolute value of the energy level of HOMO of the compound having the residue of at least two kinds of nitrogen-containing polycyclic compounds is preferably 6.2 eV or less, more preferably 5.9 eV or less. More preferably, it is 6 eV or less. In general, the lower limit is 5.0 eV.
- the T 1 energy value, LUMO energy level value, and HOMO energy level value of each compound are values calculated by a computational scientific technique.
- the quantum chemical calculation program Gaussian03 is used, and the structure of the ground state is optimized by the HF (Hartree-Fock) method.
- the time dependence of the B3P86 level was used to calculate the T 1 energy value, the LUMO energy level value, and the HOMO energy level value.
- 6-31 g * was used as a basis function. If the 6-31g * cannot be used as a basis function, LANL2DZ is used.
- the absolute value of the “LUMO energy level value” that is, when the LUMO energy level value is negative, the absolute value means a value having the negative sign). is there.
- the energy level value is linearly approximated as a function of (1 / n)
- T 1 at n ⁇ (where n is the number of polymerization of repeating units) in all cases.
- the value of the energy calculated in the same manner as described, the value of the lowest the T 1 energy among them is defined as the value of the T 1 energy of the compound.
- the compound having a residue of at least two kinds of nitrogen-containing polycyclic compounds includes a heterocyclic structure constituting the nitrogen-containing polycyclic compound and a partial structure adjacent to the heterocyclic structure (here, the partial structure Preferably have at least two ⁇ -conjugated electrons).
- the dihedral angle between the heterocyclic structure and the partial structure adjacent to the heterocyclic structure is preferably 40 ° or more, more preferably 55 ° or more, and 70 ° or more. More preferably, it is particularly preferably 80 ° or more.
- all dihedral angles between any aromatic ring and heteroaromatic ring containing the heterocyclic structure are 40 ° or more.
- it is 55 ° or more, more preferably 70 ° or more, and particularly preferably 80 ° or more.
- the dihedral angle means an angle calculated from the optimized structure in the ground state.
- the dihedral angle is, for example, the carbon atom (a 1 ) at the bonding position in the heterocyclic structure constituting the compound having the residue of the at least two kinds of nitrogen-containing polycyclic compounds and the carbon atom adjacent to a 1 or It is defined by a nitrogen atom (a 2 ), an atom (a 3 ) at the bonding position of the structure bonded to the heterocyclic structure, and an atom (a 4 ) adjacent to a 3 .
- the dihedral angle is calculated in all cases, and the lowest value (90 ° or less) among them is 2 The face angle.
- the atoms (a 3 ) and (a 4 ) are atoms having a ⁇ -conjugated electron, and more preferably a carbon atom, a nitrogen atom, a silicon atom, or a phosphorus atom.
- a computational scientific technique that is, the structure having the minimum generation energy of the structure.
- Examples of the compound having a residue of at least two types of nitrogen-containing polycyclic compounds include compounds represented by the following formulas (2-1) to (2-16).
- R * represents a hydrogen atom or a substituent.
- the substituent represented by R * include a halogen atom, an alkyl group, an alkoxy group, an alkylthio group, an aryl group optionally having a substituent, an aryloxy group, an arylthio group, an arylalkyl group, and an arylalkyloxy group.
- substituents include a monovalent heterocyclic group, an optionally substituted heteroaryl group, heteroaryloxy group, heteroarylthio group, arylalkenyl group, arylethynyl group, substituted carboxyl group, and cyano group.
- a plurality of R * may be the same or different.
- R * is more preferably an alkyl group, an alkoxy group, an aryl group which may have a substituent, or a heteroaryl group which may have a substituent.
- a plurality of R * may be the same or different.
- n represents the number of polymerizations.
- Examples of the compound having a residue of at least two types of nitrogen-containing polycyclic compounds include the following compounds.
- Examples of the phosphorescent compound include triplet light-emitting complexes and compounds that have been used as low-molecular EL light-emitting materials. These include, for example, Nature, (1998), 395, 151, Appl. Phys. Lett. (1999), 75 (1), 4, Proc. SPIE-Int. Soc. Opt. Eng. 2001 (2001), 4105 ( Organic Light-Emitting Materials and Devices IV), 119, J. Am. Chem. Soc., (2001), 123, 4304, Appl. Phys. Lett., (1997), 71 (18), 2596, Syn. Met. , (1998), 94 (1), 103, Syn. Met., (1999), 99 (2), 1361, Adv.
- the ratio of the sum of the orbital coefficients of the outermost shell d orbitals of the central metal in the HOMO of the metal complex is 1/3 or more of the sum of the squares of the total atomic orbital coefficients. This is preferable from the viewpoint of obtaining high luminous efficiency.
- the phosphorescent compound include ortho-metalated complexes in which the central metal is a transition metal belonging to the sixth period.
- the central metal of the triplet light-emitting complex is usually a metal having an atomic number of 50 or more, which has a spin-orbit interaction, and can cause an intersystem crossing between the singlet state and the triplet state.
- Gold, platinum, iridium, osmium, rhenium, tungsten, europium, terbium, thulium, dysprosium, samarium, praseodymium, gadolinium, ytterbium atoms are preferred, more preferably gold, platinum, iridium, osmium, rhenium, tungsten More preferably, they are gold, platinum, iridium, osmium and rhenium atoms, particularly preferably gold, platinum, iridium and rhenium atoms, and particularly preferably platinum and iridium atoms. .
- Examples of the ligand of the triplet light-emitting complex include 8-quinolinol and derivatives thereof, benzoquinolinol and derivatives thereof, 2-phenyl-pyridine and derivatives thereof, and the like.
- the phosphorescent compound is a compound having a substituent such as an alkyl group, an alkoxy group, an aryl group which may have a substituent, or a heteroaryl group which may have a substituent from the viewpoint of solubility. It is preferable that Further, the substituent preferably has a total number of atoms other than hydrogen atoms of 3 or more, more preferably 5 or more, still more preferably 7 or more, and particularly preferably 10 or more. Moreover, it is preferable that at least one substituent is present in each ligand, and the type of the substituent may be the same or different for each ligand.
- Examples of the phosphorescent compound include the following compounds.
- the amount of the phosphorescent compound in the composition of the present invention varies depending on the types of compounds having residues of at least two types of nitrogen-containing polycyclic compounds to be combined and the properties to be optimized,
- the amount of the compound having a residue of the nitrogen-containing polycyclic compound is 100 parts by weight, it is usually 0.01 to 80 parts by weight, preferably 0.1 to 30 parts by weight, more preferably 0 0.1 to 15 parts by weight, particularly preferably 0.1 to 10 parts by weight.
- the compound having a residue of at least two kinds of nitrogen-containing polycyclic compounds and the phosphorescent compound may be used singly or in combination of two or more. Good.
- composition of the present invention may contain an optional component other than the compound having the residue of the at least two nitrogen-containing polycyclic compounds and the phosphorescent compound as long as the object of the present invention is not impaired.
- the optional component include a hole transport material, an electron transport material, and an antioxidant.
- Examples of the hole transport material include known aromatic amines, carbazole derivatives, polyparaphenylene derivatives and the like as hole transport materials for organic EL devices.
- Examples of the electron transport material include oxadiazole derivatives, anthraquinodimethane and derivatives thereof, benzoquinone and derivatives thereof, naphthoquinones and derivatives thereof, anthraquinones and derivatives thereof, tetracyanoanthraquinodis known as electron transport materials for organic EL devices.
- Examples include methane and its derivatives, fluorenone derivatives, diphenyldicyanoethylene and its derivatives, diphenoquinone derivatives, and metal complexes of 8-hydroxyquinoline and its derivatives.
- the T 1 energy value (ETH) of the compound having the residue of the at least two kinds of nitrogen-containing polycyclic compounds and the T 1 energy value (ETG) of the phosphorescent compound are: ,
- the thin film of the present invention can be produced using the composition of the present invention.
- solution coating vapor deposition, transfer, or the like can be used.
- An offset printing method, an ink jet printing method, or the like may be used.
- the solvent is preferably a solvent that can dissolve or uniformly disperse the composition.
- the solvent include chlorinated solvents (chloroform, methylene chloride, 1,2-dichloroethane, 1,1,2-trichloroethane, chlorobenzene, o-dichlorobenzene, etc.), ether solvents (tetrahydrofuran, dioxane, etc.), aromatic carbonization.
- Hydrogen solvents toluene, xylene, etc.
- aliphatic hydrocarbon solvents cyclohexane, methylcyclohexane, n-pentane, n-hexane, n-heptane, n-octane, n-nonane, n-decane, etc.
- ketones Solvents acetone, methyl ethyl ketone, cyclohexanone, etc.
- ester solvents ethyl acetate, butyl acetate, ethyl cellosolve acetate, etc.
- polyhydric alcohols and their derivatives ethylene glycol, ethylene glycol monobutyl ether, ethylene glycol monoethyl ether, ethylene
- the viscosity of the solution is preferably 1 to 100 mPa ⁇ s at 25 ° C. Further, if the evaporation is so significant, it tends to be difficult to repeat ejection from the head.
- preferred solvents include, for example, single or mixed solvents including anisole, bicyclohexyl, xylene, tetralin and dodecylbenzene.
- a solution for ink jet printing suitable for the composition used can be obtained by a method of mixing a plurality of solvents, a method of adjusting the concentration of the composition in the solution, or the like.
- the polymer compound of the present invention is at least selected from the group consisting of nitrogen-containing polycyclic compounds represented by the formulas (1-1), (1-2), (1-3), and (1-4). It is a polymer compound containing a residue of two kinds of nitrogen-containing polycyclic compounds and a residue of a phosphorescent compound.
- the phosphorescent compound and the nitrogen-containing polycyclic compound are the same as those described and exemplified in the section of the composition.
- the polymer compound of the present invention includes (1) a polymer having a phosphorescent compound residue in the main chain, (2) a polymer compound having a phosphorescent compound residue at the terminal, and (3) a side chain. And a polymer compound having a residue of a phosphorescent compound.
- the light-emitting device of the present invention is formed using the composition of the present invention, and usually contains the composition of the present invention in at least a part of a layer provided between electrodes composed of an anode and a cathode. It is preferable to include them as a light emitting layer in the form of the light emitting thin film. In addition, a known layer having other functions may be included from the viewpoint of improving performance such as luminous efficiency and durability.
- Such layers include a charge transport layer (ie, hole transport layer, electron transport layer), a charge blocking layer (ie, hole blocking layer, electron blocking layer), a charge injection layer (ie, hole injection layer, Electron injection layer), buffer layer, and the like.
- a charge transport layer ie, hole transport layer, electron transport layer
- a charge blocking layer ie, hole blocking layer, electron blocking layer
- a charge injection layer ie, hole injection layer, Electron injection layer
- buffer layer and the like.
- each of the light-emitting layer, the charge transport layer, the charge blocking layer, the charge injection layer, the buffer layer, and the like may be composed of one layer or two or more layers.
- the light emitting layer is a layer having a function of emitting light.
- the hole transport layer is a layer having a function of transporting holes.
- the electron transport layer is a layer having a function of transporting electrons. These electron transport layer and hole transport layer are collectively referred to as a charge transport layer.
- the charge blocking layer is a layer having a function of confining holes or electrons in the light emitting layer, and a layer that transports electrons and confines holes is called a hole blocking layer. The layer that confines is called an electron blocking layer.
- buffer layer examples include a layer containing a conductive polymer compound adjacent to the anode.
- the light emitting device of the present invention include the following structures a) to q). a) anode / light emitting layer / cathode b) anode / hole transport layer / light emitting layer / cathode c) anode / light emitting layer / electron transport layer / cathode d) anode / light emitting layer / hole blocking layer / cathode e) anode / Hole transport layer / light emitting layer / electron transport layer / cathode f) anode / charge injection layer / light emitting layer / cathode g) anode / light emitting layer / charge injection layer / cathode h) anode / charge injection layer / light emitting layer / charge injection Layer / cathode i) anode / charge injection layer / hole transport layer / light emitting layer / cathode j) anode / hole transport layer / light
- the hole transport material include known materials such as polyvinyl carbazole and its Derivatives, polysilanes and derivatives thereof, polysiloxane derivatives having aromatic amines in the side chain or main chain, pyrazoline derivatives, arylamine derivatives, stilbene derivatives, triphenyldiamine derivatives, polyaniline and derivatives thereof, polythiophene and derivatives thereof, polypyrrole and derivatives thereof
- polymer hole transport materials such as derivatives, poly (p-phenylene vinylene) and derivatives thereof, poly (2,5-thienylene vinylene) and derivatives thereof, and further, JP-A 63-70257 JP 63-175860, JP 2-135359, 2-135361, 2-209988, 3-37992 Also include those described in JP same 3-152184.
- the electron transport layer contains an electron transport material
- the electron transport material include known materials such as oxadiazole derivatives and anthraquinodis. Methane and its derivatives, benzoquinone and its derivatives, naphthoquinone and its derivatives, anthraquinone and its derivatives, tetracyanoanthraquinodimethane and its derivatives, fluorenone derivatives, diphenyldicyanoethylene and its derivatives, diphenoquinone derivatives, 8-hydroxyquinoline and its derivatives And metal complexes, polyquinoline and derivatives thereof, polyquinoxaline and derivatives thereof, polyfluorene and derivatives thereof, and the like.
- the film thicknesses of the hole transport layer and the electron transport layer vary depending on the materials used and may be selected so that the drive voltage and the light emission efficiency are appropriate. If the thickness is too thick, the driving voltage of the element increases, which is not preferable. Therefore, the thickness of the hole transport layer and the electron transport layer is usually 1 nm to 1 ⁇ m, preferably 2 nm to 500 nm, and more preferably 5 nm to 200 nm.
- charge injection layers that is, the hole injection layers.
- the charge injection layer or insulating layer (usually 0.5 nm to 4 nm in average film thickness, which is adjacent to the electrode, hereinafter the same)
- a thin buffer layer may be inserted at the interface between the charge transport layer and the light-emitting layer in order to improve the adhesion at the interface or prevent mixing.
- the order and number of layers to be laminated, and the thickness of each layer can be appropriately selected in consideration of light emission efficiency and element lifetime.
- the charge injection layer is a layer containing a conductive polymer compound, provided between the anode and the hole transport layer, and an ionization potential having an intermediate value between the anode material and the hole transport material contained in the hole transport layer. And a layer containing a material having an electron affinity with an intermediate value between the cathode material and the electron transport material included in the electron transport layer.
- the material used for the charge injection layer may be appropriately selected in relation to the electrode and the material of the adjacent layer.
- Polyaniline and its derivatives, polythiophene and its derivatives, polypyrrole and its derivatives, polyphenylene vinylene and its derivatives, polythienylene Examples include vinylene and its derivatives, polyquinoline and its derivatives, polyquinoxaline and its derivatives, conductive polymer compounds such as polymers containing an aromatic amine structure in the main chain or side chain, metal phthalocyanine (copper phthalocyanine, etc.), carbon, etc. Is done.
- the insulating layer has a function of facilitating charge injection.
- the material for the insulating layer include metal fluorides, metal oxides, and organic insulating materials.
- the light emitting element provided with the insulating layer include a light emitting element provided with an insulating layer adjacent to the cathode and a light emitting element provided with an insulating layer adjacent to the anode.
- the light emitting device of the present invention is usually formed on a substrate.
- the substrate may be any substrate that does not change when the electrode is formed and the organic layer is formed, and examples thereof include substrates such as glass, plastic, polymer film, and silicon.
- the opposite electrode is preferably transparent or translucent.
- At least one of the anode and the cathode included in the light emitting device of the present invention is usually transparent or translucent. Among these, it is preferable that the anode side is transparent or translucent.
- a conductive metal oxide film, a translucent metal thin film, or the like is usually used. Specifically, a film formed using a conductive inorganic compound made of indium, zinc, tin oxide, indium-tin-oxide (ITO), indium-zinc-oxide, or the like that is a composite thereof ( NESA, etc.), gold, platinum, silver, copper, etc. are used, and ITO, indium / zinc / oxide, and tin oxide are preferable. Examples of the production method include a vacuum deposition method, a sputtering method, an ion plating method, a plating method, and the like. Further, as the anode, an organic transparent conductive film such as polyaniline or a derivative thereof, polythiophene or a derivative thereof may be used. Note that the anode may have a laminated structure of two or more layers.
- the material for the cathode is usually preferably a material having a low work function.
- metals such as lithium, sodium, potassium, rubidium, cesium, beryllium, magnesium, calcium, strontium, barium, aluminum, scandium, vanadium, zinc, yttrium, indium, cerium, samarium, europium, terbium, ytterbium, and the like Two or more of these alloys, or one or more of them and one or more of gold, silver, platinum, copper, manganese, titanium, cobalt, nickel, tungsten, tin, graphite or graphite intercalation compound, etc. Is used.
- the alloy examples include magnesium-silver alloy, magnesium-indium alloy, magnesium-aluminum alloy, indium-silver alloy, lithium-aluminum alloy, lithium-magnesium alloy, lithium-indium alloy, and calcium-aluminum alloy.
- the cathode may have a laminated structure of two or more layers.
- the light-emitting element of the present invention includes a planar light source, a display device (for example, a segment display device, a dot matrix display device, a liquid crystal display device, etc.), and a backlight (for example, a liquid crystal display device including the light-emitting element as a backlight). Etc. can be used.
- the planar anode and cathode may be arranged so as to overlap each other.
- a method of emitting light a method of forming either one of the anode or the cathode, or both electrodes in a pattern.
- both the anode and the cathode may be formed in a stripe shape and arranged so as to be orthogonal to each other. Partial color display and multi-color display are possible by a method of separately applying a plurality of types of materials having different emission colors or a method using a color filter or a fluorescence conversion filter.
- the dot matrix element can be driven passively, or may be actively driven in combination with a TFT or the like.
- a planar light emitting element is usually a self-luminous thin type, and is preferably used as a planar light source for backlight of a liquid crystal display device, illumination (for example, planar illumination, light source for illumination), etc. Can do.
- illumination for example, planar illumination, light source for illumination
- a flexible substrate it can also be used as a curved light source, illumination, display device, and the like.
- composition of the present invention can also be used as a semiconductor material such as an organic semiconductor material, a light emitting material, an optical material, or a conductive material (for example, applied by doping). Furthermore, thin films such as a light-emitting thin film, a conductive thin film, and an organic semiconductor thin film can be produced using the composition of the present invention.
- the composition of the present invention can be formed into a device by forming a conductive thin film and a semiconductor thin film by a method similar to the method for producing a light emitting thin film used for the light emitting layer of the light emitting element.
- the semiconductor thin film preferably has a higher electron mobility or hole mobility of 10 ⁇ 5 cm 2 / V / second or higher.
- the organic semiconductor thin film can be used for organic solar cells, organic transistors, and the like.
- T 1 energy of the compound (C-1) represented by the formula is 3.3 eV
- E LUMO of the LUMO energy level is 1.6 eV
- the minimum dihedral angle is 41 °.
- the parameter was calculated using the structure of compound (C-1). Specifically, the structure of compound (C-1) was optimized by the HF method. At that time, 6-31 g * was used as a basis function. Then, using the same basis function, the LUMO energy level value and the T1 energy value were calculated by the time-dependent density functional method at the B3P86 level. The dihedral angle was calculated from the structure optimized by the HF method.
- the T 1 energy value of the phosphorescent compound (MC-1) represented by the formula (1) was calculated by a computational scientific method and found to be 2.8 eV.
- a light-emitting element is manufactured using a composition comprising the compound (C-1) and the phosphorescent compound (MC-1), it can be confirmed that the light emission efficiency is excellent.
- Example 2 Following formula: The T 1 energy value of the compound (C-2) represented by the formula is 3.3 eV, the absolute value E LUMO of the HOMO energy level is 6.2 eV, and the minimum dihedral angle is 55 °. .
- the calculation of the parameters was performed by the computational scientific method in the same manner as in Example 1 using the structure of the compound (C-2).
- a light-emitting element is manufactured using a composition comprising the compound (C-2) and the phosphorescent compound (MC-1), it can be confirmed that the light emission efficiency is excellent.
- Example 3 Following formula: The T 1 energy value of the compound (C-3) represented by the formula is 3.3 eV, the absolute value E LUMO of the LUMO energy level is 1.8 eV, and the minimum dihedral angle is 45 °. .
- the parameters were calculated by the computational scientific method in the same manner as in Example 1 using the structure of compound (C-3). When a light-emitting element is manufactured using a composition comprising the compound (C-3) and the phosphorescent compound (MC-1), it can be confirmed that the light emission efficiency is excellent.
- Example 4 Following formula: The T 1 energy value of the compound (C-4) represented by the formula is 3.3 eV, the absolute value E LUMO of the energy level of HOMO is 6.1 eV, and the minimum dihedral angle is 54 °. .
- the calculation of the parameters was performed by the computational scientific method in the same manner as in Example 1 using the structure of the compound (C-4). When a light-emitting element is manufactured using a composition comprising the compound (C-4) and the phosphorescent compound (MC-1), it can be confirmed that the light emission efficiency is excellent.
- Example 5 Following formula: The value of T 1 energy of the compound represented by formula (C-5) was 3.4 eV, the absolute value E LUMO of the energy level of HOMO was 6.1 eV, and the minimum dihedral angle was 85 °. . The calculation of the parameters was performed by the computational scientific method in the same manner as in Example 1 using the structure of the compound (C-5). When a light-emitting element is manufactured using a composition comprising the compound (C-5) and the phosphorescent compound (MC-1), it can be confirmed that the light emission efficiency is excellent.
- Example 6 Following formula: The T 1 energy value of in represented by compound (C-6) is 3.3 eV, an absolute value E LUMO of HOMO energy level is 6.0 eV, the minimum dihedral angle of 64 ° .
- the parameters were calculated by the computational scientific method in the same manner as in Example 1 using the structure of compound (C-6). When a light-emitting element is manufactured using a composition comprising the compound (C-6) and the phosphorescent compound (MC-1), it can be confirmed that the luminous efficiency is excellent.
- Example 7 Following formula: The T 1 energy value of the compound (C-7) represented by the formula was 3.2 eV, and the LUMO energy level absolute value E LUMO was 1.9 eV. The calculation of the parameters was performed by the computational scientific method in the same manner as in Example 1 using the structure of the compound (C-7). When a light-emitting element is manufactured using a composition comprising the compound (C-7) and the phosphorescent compound (MC-1), it can be confirmed that the light emission efficiency is excellent.
- Example 8 Following formula: The value of T 1 energy of the compound (C-8) represented by the formula was 3.3 eV, and the absolute value E LUMO of the LUMO energy level was 1.6 eV. The calculation of the parameters was performed by the computational scientific method in the same manner as in Example 1 using the structure of the compound (C-8). When a light-emitting element is manufactured using a composition comprising the compound (C-8) and the phosphorescent compound (MC-1), it can be confirmed that the light emission efficiency is excellent.
- Example 9 Following formula: The T 1 energy value of the compound (C-9) represented by the formula was 3.3 eV, and the absolute value E LUMO of the LUMO energy level was 1.9 eV. The parameters were calculated by the computational scientific method in the same manner as in Example 1 using the structure of compound (C-9). When a light-emitting element is manufactured using a composition comprising the compound (C-9) and the phosphorescent compound (MC-1), it can be confirmed that the light emission efficiency is excellent.
- Example 10 Following formula: The T 1 energy value of the compound (C-10) represented by the formula was 3.3 eV, and the absolute value E LUMO of the LUMO energy level was 1.6 eV. The parameters were calculated by the computational scientific method in the same manner as in Example 1 using the structure of compound (C-10). Also, the following formula: The T 1 energy value of the phosphorescent compound (MC-2) represented by formula (2) was calculated by a computational scientific method to be 2.9 eV. When a light-emitting element is manufactured using a composition comprising the compound (C-10) and the phosphorescent compound (MC-2), it can be confirmed that the light emission efficiency is excellent.
- Example 11 Following formula: The T 1 energy value of the compound (C-11) represented by the formula was 3.3 eV, and the absolute value E LUMO of the LUMO energy level was 1.7 eV. The parameters were calculated by the computational scientific method in the same manner as in Example 1 using the structure of compound (C-11). When a light-emitting element is manufactured using a composition including the compound (C-11) and the phosphorescent compound (MC-2), it can be confirmed that the light emission efficiency is excellent.
- Example 12 Following formula: The value of T 1 energy of the compound (C-12) represented by the formula (3.1) was 3.1 eV, and the absolute value E LUMO of the LUMO energy level was 2.0 eV. The calculation of the parameters was performed by the computational scientific method in the same manner as in Example 1 using the structure of the compound (C-12). When a light-emitting element is manufactured using a composition comprising the compound (C-12) and the phosphorescent compound (MC-2), it can be confirmed that the light emission efficiency is excellent.
- Example 13 Following formula: The T 1 energy value of the compound (C-13) represented by the formula was 3.3 eV, and the absolute value E LUMO of the LUMO energy level was 2.2 eV. The parameters were calculated by the computational scientific method in the same manner as in Example 1 using the structure of compound (C-13). When a light-emitting element is manufactured using a composition comprising the compound (C-13) and the phosphorescent compound (MC-2), it can be confirmed that the luminous efficiency is excellent.
- Example 14 Following formula: The T 1 energy value of the compound (C-14) represented by the formula was 3.2 eV, and the absolute value E LUMO of the LUMO energy level was 2.0 eV. The parameters were calculated by the computational scientific method in the same manner as in Example 1 using the structure of compound (C-14). When a light-emitting element is manufactured using a composition comprising the compound (C-14) and the phosphorescent compound (MC-2), it can be confirmed that the luminous efficiency is excellent.
- composition of the present invention When used for a light emitting device or the like, it provides a light emitting device having excellent luminous efficiency.
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Abstract
Description
で表される含窒素多環式化合物からなる群から選ばれる少なくとも2種の含窒素多環式化合物の残基を有する化合物と、燐光発光性化合物とを含む組成物を提供する。
本発明は第二に、前記式(1-1)、(1-2)、(1-3)及び(1-4)で表される含窒素多環式化合物からなる群から選ばれる少なくとも2種の含窒素多環式化合物の残基と、燐光発光性化合物の残基とを含む高分子化合物を提供する。
本発明は第三に、前記組成物又は前記高分子化合物を用いてなる薄膜及び発光素子を提供する。
本発明は第四に、前記発光素子を備えた面状光源、表示装置及び照明を提供する。
<組成物>
本発明の組成物は、前記式(1-1)、(1-2)、(1-3)及び(1-4)(以下、「式(1-1)~(1-4)」と言う。)で表される含窒素多環式化合物からなる群から選ばれる少なくとも2種の含窒素多環式化合物の残基を有する化合物(以下、「前記少なくとも2種の含窒素多環式化合物の残基を有する化合物」ということがある。)と、燐光発光性化合物とを含む組成物である。本発明において、例えば、前記式(1-1)~(1-4)で表される化合物の残基とは、前記式(1-1)~(1-4)で表される化合物におけるRの一部又は全部(特には、1~3個)を取り除いてなる基を意味する。また、「高分子化合物」は、同じ構造(繰り返し単位)が少なくとも2個化合物中に存在するものを意味する。
で表される化合物、その残基を有する化合物も挙げられる。
で表される化合物の残基を有することも好ましい。
で表される構造、及び下記式(4-4)又は(4-5):
で表される構造が挙げられる。
で表される構造の芳香族アミン構造が挙げられる。
で表される。ここで、n=1、2及び3の構造に対して、T1エネルギーの値、LUMOのエネルギーレベルの値、HOMOのエネルギーレベルの値を算出し、算出されたT1エネルギーの値、LUMOのエネルギーレベルの値を(1/n)の関数として線形近似した場合のn=∞の値を、該高分子化合物のT1エネルギーの値、LUMOのエネルギーレベルの値、HOMOのエネルギーレベルの値と定義する。
ETH > ETG (eV)
を満たすことが、高効率発光の観点から好ましく、
ETH > ETG+0.1(eV)
を満たすことが、より好ましく、
ETH > ETG+0.2(eV)
を満たすことが、さらに好ましい。
本発明の高分子化合物は、前記式(1-1)、(1-2)、(1-3)、(1-4)で表される含窒素多環式化合物からなる群から選ばれる少なくとも2種の含窒素多環式化合物の残基と、燐光発光性化合物の残基とを含む高分子化合物である。前記燐光発光性化合物及び前記含窒素多環式化合物は、前記組成物の項で説明し例示したものと同様である。本発明の高分子化合物としては、(1)主鎖に燐光発光性化合物の残基を有する高分子、(2)末端に燐光発光性化合物の残基を有する高分子化合物、(3)側鎖に燐光発光性化合物の残基を有する高分子化合物等が挙げられる。
次に、本発明の発光素子について説明する。
本発明の発光素子は、本発明の組成物等を用いてなるものであり、通常、陽極及び陰極からなる電極間に設けられた層の少なくとも一部に本発明の組成物等を含むが、それらを前記発光性薄膜の形態で発光層として含むことが好ましい。また、発光効率、耐久性等の性能を向上させる観点から、他の機能を有する公知の層を含んでいてもよい。このような層としては、電荷輸送層(即ち、正孔輸送層、電子輸送層)、電荷阻止層(即ち、正孔阻止層、電子阻止層)、電荷注入層(即ち、正孔注入層、電子注入層)、バッファ層等が挙げられる。なお、本発明の発光素子において、発光層、電荷輸送層、電荷阻止層、電荷注入層、バッファ層等は、各々、一層からなるものでも二層以上からなるものでもよい。
a)陽極/発光層/陰極
b)陽極/正孔輸送層/発光層/陰極
c)陽極/発光層/電子輸送層/陰極
d)陽極/発光層/正孔阻止層/陰極
e)陽極/正孔輸送層/発光層/電子輸送層/陰極
f)陽極/電荷注入層/発光層/陰極
g)陽極/発光層/電荷注入層/陰極
h)陽極/電荷注入層/発光層/電荷注入層/陰極
i)陽極/電荷注入層/正孔輸送層/発光層/陰極
j)陽極/正孔輸送層/発光層/電荷注入層/陰極
k)陽極/電荷注入層/正孔輸送層/発光層/電荷注入層/陰極
l)陽極/電荷注入層/発光層/電子輸送層/陰極
m)陽極/発光層/電子輸送層/電荷注入層/陰極
n)陽極/電荷注入層/発光層/電子輸送層/電荷注入層/陰極
o)陽極/電荷注入層/正孔輸送層/発光層/電子輸送層/陰極
p)陽極/正孔輸送層/発光層/電子輸送層/電荷注入層/陰極
q)陽極/電荷注入層/正孔輸送層/発光層/電子輸送層/電荷注入層/陰極
(ここで、/は各層が隣接して積層されていることを示す。以下、同じである。なお、発光層、正孔輸送層、電子輸送層は、それぞれ独立に2層以上用いてもよい。)
下記式:
また、下記式:
化合物(C-1)と燐光発光性化合物(MC-1)とからなる組成物を用いて発光素子を作製すると、発光効率が優れることが確認できる。
下記式:
化合物(C-2)と燐光発光性化合物(MC-1)とからなる組成物を用いて発光素子を作製すると、発光効率が優れることが確認できる。
下記式:
化合物(C-3)と燐光発光性化合物(MC-1)とからなる組成物を用いて発光素子を作製すると、発光効率が優れることが確認できる。
下記式:
化合物(C-4)と燐光発光性化合物(MC-1)とからなる組成物を用いて発光素子を作製すると、発光効率が優れることが確認できる。
下記式:
化合物(C-5)と燐光発光性化合物(MC-1)とからなる組成物を用いて発光素子を作製すると、発光効率が優れることが確認できる。
下記式:
化合物(C-6)と燐光発光性化合物(MC-1)とからなる組成物を用いて発光素子を作製すると、発光効率が優れることが確認できる。
下記式:
化合物(C-7)と燐光発光性化合物(MC-1)とからなる組成物を用いて発光素子を作製すると、発光効率が優れることが確認できる。
下記式:
化合物(C-8)と燐光発光性化合物(MC-1)とからなる組成物を用いて発光素子を作製すると、発光効率が優れることが確認できる。
下記式:
化合物(C-9)と燐光発光性化合物(MC-1)とからなる組成物を用いて発光素子を作製すると、発光効率が優れることが確認できる。
下記式:
また、下記式:
化合物(C-10)と燐光発光性化合物(MC-2)とからなる組成物を用いて発光素子を作製すると、発光効率が優れることが確認できる。
下記式:
化合物(C-11)と燐光発光性化合物(MC-2)とからなる組成物を用いて発光素子を作製すると、発光効率が優れることが確認できる。
下記式:
化合物(C-12)と燐光発光性化合物(MC-2)とからなる組成物を用いて発光素子を作製すると、発光効率が優れることが確認できる。
下記式:
化合物(C-13)と燐光発光性化合物(MC-2)とからなる組成物を用いて発光素子を作製すると、発光効率が優れることが確認できる。
下記式:
化合物(C-14)と燐光発光性化合物(MC-2)とからなる組成物を用いて発光素子を作製すると、発光効率が優れることが確認できる。
下記式:
で表される高分子化合物(CP-1)のnをn=∞に外挿して算出したT1エネルギーの値は2.6eVであり、LUMOのエネルギーレベルの絶対値ELUMOは2.1eVであり、HOMOのエネルギーレベルの絶対値EHOMOは5.7eVであり、最小の2面角は45°であった。パラメータの計算は、高分子化合物(CP-1)における下記式(CM-1)で表される繰り返し単位(CM-1)を下記式(CM-1a)のとおり簡略化し、実施例3と同様にして計算科学的手法で行った。
Claims (21)
- 前記少なくとも2種の含窒素多環式化合物の残基を有する化合物が、前記式(1-1)、(1-2)及び(1-3)で表される含窒素多環式化合物からなる群から選ばれる少なくとも2種の含窒素多環式化合物の残基を有する化合物である請求項1に記載の組成物。
- 前記Rの少なくとも1個が、アルキル基、アルコキシ基、置換基を有していてもよいアリール基、又は置換基を有していてもよいヘテロアリール基である請求項1又は2に記載の組成物。
- 前記Rの少なくとも1個が、水素原子以外の原子の総数が3以上の置換基である請求項3に記載の組成物。
- 前記Rの少なくとも1個が、炭素数3~10のアルキル基、又は炭素数3~10のアルコキシ基である請求項4に記載の組成物。
- 前記少なくとも2種の含窒素多環式化合物の残基を有する化合物が、下記式(A-1)又は(A-2):
で表される化合物、又はその残基を有する化合物である請求項1~5のいずれか一項に記載の組成物。 - 前記少なくとも2種の含窒素多環式化合物の残基を有する化合物が高分子化合物である請求項1~6のいずれか一項に記載の組成物。
- 前記少なくとも2種の含窒素多環式化合物の残基を有する化合物が、前記式(A-1)又は(A-2)で表される化合物の残基を含む繰り返し単位を有する高分子化合物である請求項7に記載の組成物。
- 前記少なくとも2種の含窒素多環式化合物の残基を有する化合物の計算科学的手法により算出した最低三重項励起エネルギーの値が3.0eV以上である請求項1~8のいずれか一項に記載の組成物。
- 前記少なくとも2種の含窒素多環式化合物の残基を有する化合物の計算科学的手法により算出した最低非占有分子軌道のエネルギーレベルの絶対値が1.5eV以上である請求項1~9のいずれか一項に記載の組成物。
- 前記少なくとも2種の含窒素多環式化合物の残基を有する化合物の計算科学的手法により算出した最高占有分子軌道のエネルギーレベルの絶対値が6.2eV以下である請求項1~9のいずれか一項に記載の組成物。
- 前記少なくとも2種の含窒素多環式化合物の残基を有する化合物の最低三重項励起エネルギーの値(ETH)と、前記燐光発光性化合物の最低三重項励起エネルギーの値(ETG)とが、下記式:
ETH > ETG (eV)
を満たす請求項1~11のいずれか一項に記載の組成物。 - 前記少なくとも2種の含窒素多環式化合物の残基を有する化合物が、該含窒素多環式化合物を構成する複素環構造と、該複素環構造に隣接する部分構造を有し、該部分構造は少なくとも2個のπ共役電子を有するものであって、該複素環構造と該部分構造との間の2面角が40°以上である化合物である請求項1~12のいずれか一項に記載の組成物。
- 前記燐光発光性化合物が、イリジウム錯体又は白金錯体である請求項1~13のいずれか一項に記載の組成物。
- 前記燐光発光性化合物が、イリジウム又は白金を中心金属とし、8-キノリノール若しくはその誘導体、ベンゾキノリノール若しくはその誘導体、又は2-フェニル-ピリジン若しくはその誘導体を配位子とする金属錯体である請求項14に記載の組成物。
- 請求項1~15のいずれか一項に記載の組成物又は請求項16に記載の高分子化合物を用いてなる薄膜。
- 請求項1~15のいずれか一項に記載の組成物又は請求項16に記載の高分子化合物を用いてなる発光素子。
- 請求項18に記載の発光素子を備えた面状光源。
- 請求項18に記載の発光素子を備えた表示装置。
- 請求項18に記載の発光素子を備えた照明。
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JP2010031248A (ja) * | 2008-06-23 | 2010-02-12 | Sumitomo Chemical Co Ltd | 組成物及び該組成物を用いてなる発光素子 |
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US9062003B2 (en) | 2010-10-06 | 2015-06-23 | Glaxosmithkline Llc | Benzimidazole derivatives as PI3 kinase inhibitors |
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US10660898B2 (en) | 2010-10-06 | 2020-05-26 | Glaxosmithkline Llc | Benzimidazole derivatives as PI3 kinase inhibitors |
US9056874B2 (en) | 2012-05-04 | 2015-06-16 | Novartis Ag | Complement pathway modulators and uses thereof |
US9475806B2 (en) | 2013-03-14 | 2016-10-25 | Novartis Ag | Complement factor B inhibitors and uses there of |
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Also Published As
Publication number | Publication date |
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EP2305771A4 (en) | 2012-08-01 |
JP2010031250A (ja) | 2010-02-12 |
CN102066523A (zh) | 2011-05-18 |
KR20110033823A (ko) | 2011-03-31 |
EP2305771A1 (en) | 2011-04-06 |
US20110114888A1 (en) | 2011-05-19 |
TW201009042A (en) | 2010-03-01 |
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