WO2021073393A1 - 一种磷光主体材料及其应用 - Google Patents
一种磷光主体材料及其应用 Download PDFInfo
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- WO2021073393A1 WO2021073393A1 PCT/CN2020/117525 CN2020117525W WO2021073393A1 WO 2021073393 A1 WO2021073393 A1 WO 2021073393A1 CN 2020117525 W CN2020117525 W CN 2020117525W WO 2021073393 A1 WO2021073393 A1 WO 2021073393A1
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- 0 *c1cccc2c1C(CCCCCC1)=C1*2C(CCC1)CC2=C1NC1=CC=CCC=C21 Chemical compound *c1cccc2c1C(CCCCCC1)=C1*2C(CCC1)CC2=C1NC1=CC=CCC=C21 0.000 description 6
- FNDMNTIVMJVFHJ-UHFFFAOYSA-N C[n](c1c2cccc1)c1c2c([AlH2])ccc1 Chemical compound C[n](c1c2cccc1)c1c2c([AlH2])ccc1 FNDMNTIVMJVFHJ-UHFFFAOYSA-N 0.000 description 2
- KQMGREWURXDZTN-GUVSSTLPSA-N C/C=C(\C1=C/C=C)/c2ccccc2C1(c1ccccc1)c1ccccc1 Chemical compound C/C=C(\C1=C/C=C)/c2ccccc2C1(c1ccccc1)c1ccccc1 KQMGREWURXDZTN-GUVSSTLPSA-N 0.000 description 1
- QFRNXPGIGJFGKU-HNEJSWODSA-M C/C=C(\C1=C/C=C\C[n](c2c3cccc2)c2c3c([AlH]I)ccc2)/c2ccccc2[Si]11c(cccc2)c2-c2c1cccc2 Chemical compound C/C=C(\C1=C/C=C\C[n](c2c3cccc2)c2c3c([AlH]I)ccc2)/c2ccccc2[Si]11c(cccc2)c2-c2c1cccc2 QFRNXPGIGJFGKU-HNEJSWODSA-M 0.000 description 1
- QGLNAMXFKYHTRC-UHFFFAOYSA-N CC(C1)C=Cc([o]c2c3)c1c2ccc3I Chemical compound CC(C1)C=Cc([o]c2c3)c1c2ccc3I QGLNAMXFKYHTRC-UHFFFAOYSA-N 0.000 description 1
- RJUJEMGXRAKKBU-UHFFFAOYSA-N CC1(C)c2cc(C[n](c3c4cccc3)c3c4c([AlH2])ccc3)ccc2-c2ccccc12 Chemical compound CC1(C)c2cc(C[n](c3c4cccc3)c3c4c([AlH2])ccc3)ccc2-c2ccccc12 RJUJEMGXRAKKBU-UHFFFAOYSA-N 0.000 description 1
- OXIYXEGYVUZOTQ-UHFFFAOYSA-M C[Si+]1(C)c2cc(C[n](c3c4cccc3)c3c4c([AlH]I)ccc3)ccc2-c2c1cccc2 Chemical compound C[Si+]1(C)c2cc(C[n](c3c4cccc3)c3c4c([AlH]I)ccc3)ccc2-c2c1cccc2 OXIYXEGYVUZOTQ-UHFFFAOYSA-M 0.000 description 1
- HWEFGMDSGJVOGA-INYIOLQUSA-N Cc1c(/C=C\C=C/C[n](c2c3cccc2)c2c3c([AlH2])ccc2)c2ccccc2[o]1 Chemical compound Cc1c(/C=C\C=C/C[n](c2c3cccc2)c2c3c([AlH2])ccc2)c2ccccc2[o]1 HWEFGMDSGJVOGA-INYIOLQUSA-N 0.000 description 1
- KBGXLGASDDXCOM-VXRHNKDUSA-N Cc1c(/C=C\C=C/C[n]2c(c(cccc3)c3cc3)c3c3c2cccc3[AlH2])c2ccc(cccc3)c3c2[o]1 Chemical compound Cc1c(/C=C\C=C/C[n]2c(c(cccc3)c3cc3)c3c3c2cccc3[AlH2])c2ccc(cccc3)c3c2[o]1 KBGXLGASDDXCOM-VXRHNKDUSA-N 0.000 description 1
- ZNNAVTLBTNCSNA-UHFFFAOYSA-N [AlH2]c1cccc2c1c(cccc1)c1[n]2Cc1c2[s]c3ccccc3c2ccc1 Chemical compound [AlH2]c1cccc2c1c(cccc1)c1[n]2Cc1c2[s]c3ccccc3c2ccc1 ZNNAVTLBTNCSNA-UHFFFAOYSA-N 0.000 description 1
- TXCDCPKCNAJMEE-UHFFFAOYSA-N c(cc1)cc2c1[o]c1c2cccc1 Chemical compound c(cc1)cc2c1[o]c1c2cccc1 TXCDCPKCNAJMEE-UHFFFAOYSA-N 0.000 description 1
- IYYZUPMFVPLQIF-UHFFFAOYSA-N c(cc1)cc2c1[s]c1ccccc21 Chemical compound c(cc1)cc2c1[s]c1ccccc21 IYYZUPMFVPLQIF-UHFFFAOYSA-N 0.000 description 1
- LEHNQBUXPWSUBX-UHFFFAOYSA-N c(cc1)ccc1-[n]1c2c(c3ccccc3[s]3)c3ccc2c2c1cccc2 Chemical compound c(cc1)ccc1-[n]1c2c(c3ccccc3[s]3)c3ccc2c2c1cccc2 LEHNQBUXPWSUBX-UHFFFAOYSA-N 0.000 description 1
- GOLKYUOHLRAKCK-UHFFFAOYSA-N c(cc1)ccc1-c(cc1)cc(c(c2ccc3)c3-c3cccc(-c4nc(-c5ccccc5)c5[s]c6ccccc6c5n4)c3)c1[n]2-c1ccccc1 Chemical compound c(cc1)ccc1-c(cc1)cc(c(c2ccc3)c3-c3cccc(-c4nc(-c5ccccc5)c5[s]c6ccccc6c5n4)c3)c1[n]2-c1ccccc1 GOLKYUOHLRAKCK-UHFFFAOYSA-N 0.000 description 1
- PFCJGRHBQVDYQK-UHFFFAOYSA-N c(cc1)ccc1-c(cc1)ccc1-[n](c1ccccc1c1c2)c1ccc2-c(cc1)cc(c2c3cccc2)c1[n]3-c1ccccc1 Chemical compound c(cc1)ccc1-c(cc1)ccc1-[n](c1ccccc1c1c2)c1ccc2-c(cc1)cc(c2c3cccc2)c1[n]3-c1ccccc1 PFCJGRHBQVDYQK-UHFFFAOYSA-N 0.000 description 1
- YNPNZTXNASCQKK-UHFFFAOYSA-N c1cc2ccc(cccc3)c3c2cc1 Chemical compound c1cc2ccc(cccc3)c3c2cc1 YNPNZTXNASCQKK-UHFFFAOYSA-N 0.000 description 1
- UFWIBTONFRDIAS-UHFFFAOYSA-N c1ccc(cccc2)c2c1 Chemical compound c1ccc(cccc2)c2c1 UFWIBTONFRDIAS-UHFFFAOYSA-N 0.000 description 1
Classifications
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K11/00—Luminescent, e.g. electroluminescent, chemiluminescent materials
- C09K11/06—Luminescent, e.g. electroluminescent, chemiluminescent materials containing organic luminescent materials
Definitions
- the invention relates to a functional material for an organic electronic device, in particular to a phosphorescent host material and its application in an organic electronic device, especially a phosphorescent organic electroluminescent device.
- OLEDs Organic light-emitting diodes
- OLEDs have excellent properties such as light weight, active light emission, wide viewing angles, high contrast, high luminous efficiency, low energy consumption, easy preparation of flexible and large-sized panels, and are regarded by the industry as the most promising next-generation display technology .
- Organic light-emitting diodes using fluorescent materials have the characteristics of high reliability, but their internal electroluminescence quantum The efficiency is limited to 25% because the ratio of the singlet excited state to the triplet excited state of the excitons generated by the current is 1:3.
- organic light-emitting diodes using phosphorescent materials have achieved almost 100% internal electroluminescence quantum efficiency, and therefore, the development of phosphorescent light-emitting materials has been extensively studied.
- the luminescent material can be used as the luminescent material together with the host material (host) to improve color purity, luminous efficiency and stability.
- the host material/guest system is used as the light emitting layer of the light emitting device, the host material has a great influence on the efficiency and characteristics of the electroluminescent device, so the choice of the host material is very important.
- the host material mainly plays the role of energy transmission in the light-emitting layer.
- the host material needs to have suitable HOMO and LUMO energy levels, which can reduce the barriers for electron and hole injection; the triplet energy level of the host material is higher than the triplet energy level of the light-emitting guest material, which can prevent energy rotation; host material It is necessary to have a certain charge transfer balance ability, so that the exciton recombination area is concentrated in the center of the light-emitting layer to achieve high energy utilization efficiency and device stability.
- CBP 4,4'-dicarbazole-biphenyl
- BAlq bis(2-methyl)-8-quinolinol-4-phenyl aluminum (III)
- BCP phenanthroline
- bipolarly transmitted molecules as the main body can obtain good device performance.
- the performance and lifetime of the obtained device still need to be improved.
- the purpose of the present invention is to provide a dual-host type phosphorescent host material and its application in organic electronic devices, aiming to solve the problems of low performance and device life of the existing organic electronic devices.
- the present invention relates to a phosphorescent host material, comprising at least one electron transport type (N-type) host material H1 and a hole transport type (P-type) host material H2.
- the H1 is an N-type host material, and the H1 Selected from the structure shown in general formula (1):
- Ar 1 is selected from substituted or unsubstituted aromatic groups or heteroaromatic groups with 6-60 ring atoms, and Ar 1 contains at least one electron-deficient group;
- Ar 2 , Ar 3 , and Ar 4 each independently represent a substituted or unsubstituted aromatic group or heteroaromatic group with 6-30 ring atoms, and the connecting position of N and Ar 3 can be any carbon atom on Ar 3 on;
- the H2 is a P-type host material, and the H2 is selected from the structure represented by the general formula (2):
- n is selected from 1, 2, 3 or 4;
- X is independently selected from CR 3 or N;
- L 1 represents a single bond, an aromatic group or heteroaromatic group with 5-30 ring atoms, and the linking position of L 1 can be on any carbon atom in the ring;
- R 1 -R 5 are the same or different each time, and R 1 -R 5 are each independently selected from H, D, linear alkyl groups having 1 to 20 C atoms, and alkoxy groups having 1 to 20 C atoms , Thioalkoxy with 1 to 20 C atoms, branched alkyl with 3 to 20 C atoms, cyclic alkyl with 3 to 20 C atoms, and alkane with 3 to 20 C atoms An oxy group, a thioalkoxy group having 3 to 20 C atoms, a silyl group, a keto group having 1 to 20 C atoms, an alkoxycarbonyl group having 2 to 20 C atoms, having 7 to 20 C atoms C-atom aryloxycarbonyl, cyano, carbamoyl, haloformyl, formyl, isocyano, isocyanate, thiocyanate, isothiocyanate, hydroxyl, nitro, CF 3 , Cl, Br
- a composition comprising at least one phosphorescent host material as described above and at least one organic solvent.
- An organic electronic device includes a light-emitting layer, and the host material of the light-emitting layer includes the phosphorescent host material as described above.
- the phosphorescent host material according to the present invention is used in OLEDs, and can provide higher light-emitting stability and device lifetime.
- the possible reasons are as follows, but not limited to this.
- the N-type compound H1 of the present invention has electron transport properties; the P-type compound has hole transport properties, and the PN-type phosphorescent host material has a function of balancing charge transport.
- both H1 and H2 have suitable LUMO and HOMO energy levels.
- H1 and H2 molecules can form an exciplex energy intermediate with a smaller ⁇ E ST , which has a higher energy utilization rate, thereby improving the performance of related devices. Luminous efficiency and lifetime.
- the present invention provides a type of phosphorescent host material and its application in organic electroluminescent devices.
- the present invention will be described in further detail below. It should be understood that the specific embodiments described here are only used to explain the present invention, but not to limit the present invention.
- the host material In the embodiments of the present invention, the host material, the host material, the Host material and the Matrix material have the same meaning and can be interchanged.
- the singlet state and the singlet state have the same meaning and can be interchanged.
- the triplet state and the triplet state have the same meaning and can be interchanged.
- P-type and N-type refer to the conductivity characteristics of the material
- P-type host material functions as an electron donor (hole transport)
- N-type host material functions as an electron acceptor (electron transport).
- the P-type host and the hole-transporting host material have the same meaning
- the N-type host and the electron-transporting host material have the same meaning.
- substituted means that the hydrogen atom in the substituted group is replaced by the substituent.
- substituted or unsubstituted means that the defined group may be substituted or unsubstituted.
- the defined group when the defined group is substituted, it should be understood to be optionally substituted by a group acceptable in the art, including but not limited to: straight chain alkyl containing 1 to 20 C atoms, containing 3 to 20 C atoms
- the branched chain alkyl group, the cycloalkyl group containing 3-20 ring atoms, the heterocyclic group containing 3-20 ring atoms, the aryl group containing 5-20 ring atoms, the heterocyclic group containing 5-20 ring atoms Aryl, silyl, carbonyl, alkoxycarbonyl, aryloxycarbonyl, carbamoyl, haloformyl, formyl, -NRR', cyano, isocyano, isocyanate, thiocyanate, isocyanate A thiocyanate group, a hydroxyl group, a
- the number of ring atoms means the number of structural compounds (for example, monocyclic compounds, condensed ring compounds, cross-linked compounds, carbocyclic compounds, heterocyclic compounds) obtained by synthesizing a cyclic atom bond to form the ring itself The number of atoms among atoms.
- the ring is substituted by a substituent, the atoms contained in the substituent are not included in the ring-forming atoms.
- the number of ring atoms of the benzene ring is 6
- the number of ring atoms of the naphthalene ring is 10
- the number of ring atoms of the thienyl group is 5.
- the aromatic group refers to a hydrocarbon group containing at least one aromatic ring.
- a heteroaromatic group refers to an aromatic hydrocarbon group containing at least one heteroatom.
- the heteroatoms are preferably selected from Si, N, P, O, S and/or Ge, particularly preferably selected from Si, N, P, O and/or S.
- a fused-ring aromatic group means that the ring of an aromatic group can have two or more rings, in which two carbon atoms are shared by two adjacent rings, that is, a fused ring.
- the fused heterocyclic aromatic group refers to a fused ring aromatic hydrocarbon group containing at least one heteroatom.
- aromatic groups or heteroaromatic groups include not only aromatic ring systems but also non-aromatic ring systems.
- systems such as pyridine, thiophene, pyrrole, pyrazole, triazole, imidazole, oxazole, oxadiazole, thiazole, tetrazole, pyrazine, pyridazine, pyrimidine, triazine, carbene, etc., are also considered for the purpose of this invention Is an aromatic group or a heterocyclic aromatic group.
- the fused-ring aromatic or fused heterocyclic aromatic ring system not only includes the system of aromatic groups or heteroaromatic groups, but also multiple aromatic groups or heterocyclic aromatic groups can be shortened
- Non-aromatic units are discontinuous ( ⁇ 10% of non-H atoms, preferably less than 5% of non-H atoms, such as C, N or O atoms). Therefore, systems such as 9,9'-spirobifluorene, 9,9-diaryl fluorene, triarylamine, diaryl ether, etc., are also considered to be fused-ring aromatic ring systems for the purpose of this invention.
- connection site when the connection site is not specified, it means that the optional connectable site is used as the connection site;
- an optional number of hydrogens can be replaced by D;
- the energy level structure of the organic material the triplet energy levels E T , HOMO and LUMO play a key role.
- the following is an introduction to these energy levels.
- HOMO and LUMO energy levels can be measured by photoelectric effects, such as XPS (X-ray Photoelectron Spectroscopy) and UPS (Ultraviolet Photoelectron Spectroscopy) or by cyclic voltammetry (hereinafter referred to as CV).
- photoelectric effects such as XPS (X-ray Photoelectron Spectroscopy) and UPS (Ultraviolet Photoelectron Spectroscopy) or by cyclic voltammetry (hereinafter referred to as CV).
- CV cyclic voltammetry
- DFT density functional theory
- the triplet energy level E T1 of organic materials can be measured by low-temperature time-resolved luminescence spectroscopy, or obtained by quantum simulation calculations (such as by Time-dependent DFT), such as by commercial software Gaussian 03W (Gaussian Inc.), specific simulation methods See WO2011141110 or as described in the examples below.
- the absolute value of HOMO, LUMO, E T1 depends on the measurement method or calculation method used, even for the same method, different evaluation methods, for example, the starting point and peak point on the CV curve can give different HOMO/ LUMO value. Therefore, reasonable and meaningful comparisons should be made with the same measurement method and the same evaluation method.
- the values of HOMO, LUMO, and E T1 are simulations based on Time-dependent DFT, but do not affect the application of other measurement or calculation methods.
- (HOMO-1) is defined as the second highest occupied orbital energy level
- (HOMO-2) is defined as the third highest occupied orbital energy level
- (LUMO+1) is defined as the second lowest unoccupied orbital energy level
- (LUMO+2) is the third lowest occupied orbital energy level, and so on.
- the present invention relates to a phosphorescent host material, comprising at least one electron-transporting (N-type) host material H1 and a hole-transporting (P-type) host material H2.
- the N-type host material H1 is selected from the group consisting of: 1) The structure shown:
- Ar 1 is selected from substituted or unsubstituted aromatic groups or heteroaromatic groups with 6-60 ring atoms, and Ar 1 contains at least one electron-deficient group;
- Ar 2 , Ar 3 , and Ar 4 each independently represent a substituted or unsubstituted aromatic group or heteroaromatic group with 6-30 ring atoms, and the connecting position of N and Ar 3 can be any carbon atom on Ar 3 on;
- the P-type host material H2 is selected from the structure shown in the general formula (2):
- n is selected from 1, 2, 3 or 4; preferably, n is selected from 2 or 3 or 4; more preferably, n is selected from 3 or 4;
- X is independently selected from CR 3 or N;
- L 1 represents a single bond, an aromatic group or heteroaromatic group with 5-30 ring atoms, and the linking position of L 1 can be on any carbon atom in the ring;
- R 1 -R 5 is independently selected from H, D, or linear alkyl, alkoxy or thioalkoxy having 1 to 20 C atoms, or those having 3 to 20 C atoms A branched or cyclic alkyl, alkoxy or thioalkoxy group, or silyl group, or a keto group having 1 to 20 C atoms, or an alkoxycarbonyl group having 2 to 20 C atoms, Or aryloxycarbonyl, cyano, carbamoyl, haloformyl, formyl, isocyano, isocyanate, thiocyanate or isothiocyanate, hydroxyl, nitro with 7 to 20 C atoms, CF 3 , Cl, Br, F, I, crosslinkable groups, or substituted or unsubstituted aromatic groups or heteroaromatic groups with 5 to 60 ring atoms, or 5 to 60 ring atoms
- aryloxy or heteroaryloxy groups or a combination of
- two adjacent groups can be connected to each other and form a cyclic structure with the atoms connected to the two groups.
- the cyclic structure can be a spiro ring or a parallel ring, and the ring can be a saturated ring or a ring.
- R 1 and R 2 can be connected to each other to form a spiro ring together with the carbon atom connected to R 1 and R 2; for example Among them, two adjacent R 3 can be connected to each other to form a fused ring with the benzene ring connected to R 3, for example
- adjacent linking groups form a ring, which may be a ring containing an unsaturated bond, for example Where R 4 and R 5 form a ring, which can form
- the weight percentage of the N-type host material H1 and the P-type host material H2 is 3:7-7:3; preferably, the N-type host material H1 and the P-type host The weight percentage of material H2 is 5:5.
- an excimer complex can be formed between H1 and H2.
- H1 and H2 When used as a phosphorescent host material, it is more convenient for effective charge transfer in the device.
- the above-mentioned phosphorescent host material has a min((LUMO(H1)-HOMO(H2), LUMO(H2)-HOMO(H1)) in the range of 1.9-3.1 eV.
- the above-mentioned phosphorescent host material has min(LUMO(H1)-HOMO(H2), LUMO(H2)-HOMO(H1)) in the range of 1.9-2.4 eV.
- Such phosphorescent host materials can be preferentially used as red phosphorescent host materials.
- its min (LUMO(H1)-HOMO(H2), LUMO(H2)-HOMO(H1)) is in the range of 2.4-2.7 eV.
- Such phosphorescent host materials can be preferentially used as green phosphorescent host materials.
- its min (LUMO(H1)-HOMO(H2), LUMO(H2)-HOMO(H1)) is in the range of 2.7-3.1 eV.
- Such phosphorescent host materials can be preferentially used as blue phosphorescent host materials.
- H1 and H2 form a type II semiconductor heterojunction structure.
- H1 has a smaller singlet-triplet energy level difference ⁇ E ST , better, ⁇ E ST (H1) ⁇ 0.3eV; better, ⁇ E ST (H1) ⁇ 0.2eV; Better ⁇ E ST (H1) ⁇ 0.15eV.
- At least one of the H1 and H2 (HOMO-(HOMO-1)) ⁇ 0.2 eV, preferably ⁇ 0.25 eV, more preferably ⁇ 0.3eV, more preferably ⁇ 0.35eV, very preferably ⁇ 0.4eV, most preferably ⁇ 0.45eV.
- the phosphorescent host material according to the present invention is characterized in that (HOMO-(HOMO-1)) ⁇ 0.2 eV of each of said H1 and H2, preferably one of them
- the (HOMO-(HOMO-1)) ⁇ 0.25 eV, more preferably ⁇ 0.3 eV, more preferably ⁇ 0.35 eV, very preferably ⁇ 0.4 eV, most preferably ⁇ 0.45 eV.
- the phosphorescent host material according to the present invention is characterized in that at least one of H1 and H2 has ((LUMO+1)-LUMO) ⁇ 0.15eV, preferably ⁇ 0.20eV , More preferably ⁇ 0.25eV, more preferably ⁇ 0.30eV, very preferably ⁇ 0.35eV, most preferably ⁇ 0.40eV.
- the phosphorescent host material according to the present invention is characterized in that each of the H1 and H2 has ((LUMO+1)-LUMO) ⁇ 0.15 eV, preferably One of ((LUMO+1)-LUMO) is ⁇ 0.20 eV, more preferably ⁇ 0.25 eV, more preferably ⁇ 0.30 eV, very preferably ⁇ 0.35 eV, and most preferably ⁇ 0.40 eV.
- Ar 1 in the general formula (1) contains at least one electron-deficient group, and the electron-deficient group is selected from one of F, cyano or the following groups or Variety:
- n 1 means 1, 2 or 3;
- W is selected from CR 6 or N, and at least one of them is N;
- R 6 -R 8 is independently selected from H, D, or linear alkyl, alkoxy or thioalkoxy having 1 to 20 C atoms, or those having 3 to 20 C atoms A branched or cyclic alkyl, alkoxy or thioalkoxy group, or silyl group, or a keto group having 1 to 20 C atoms, or an alkoxycarbonyl group having 2 to 20 C atoms, Or aryloxycarbonyl, cyano, carbamoyl, haloformyl, formyl, isocyano, isocyanate, thiocyanate or isothiocyanate, hydroxyl, nitro with 7 to 20 C atoms, CF 3 , Cl, Br, F, I, crosslinkable groups, or substituted or unsubstituted aromatic groups or heteroaromatic groups with 5 to 60 ring atoms, or 5 to 60 ring atoms Aryloxy or heteroaryloxy groups, or a combination of these systems
- the electron-deficient group is selected from one or more of F, cyano or the following groups:
- Ar 1 in the general formula (1) is selected from the following groups:
- Ar 1 in the general formula (1) is selected from the following groups:
- each occurrence of R 6 is independently selected from: substituted or unsubstituted aromatic groups having 5 to 20 ring atoms or substituted or unsubstituted heteroaromatic groups having 5 to 20 ring atoms ; Further, when the above-mentioned groups are further substituted, they are selected from the following groups: D, straight-chain alkyl having 1 to 20 C atoms, branched alkyl having 3 to 20 C atoms, having 3 Cyclic alkyl groups with to 20 C atoms, halogens, cyano groups, aromatic groups with 5 to 10 ring atoms or heteroaromatic groups with 5 to 10 ring atoms;
- each occurrence of R 6 is independently selected from: phenyl, naphthyl, biphenyl, terphenyl, deuterated phenyl, or deuterated biphenyl.
- Ar 1 is selected from substituted or unsubstituted aromatic groups or heteroaromatic groups with 6-30 ring atoms;
- Ar 1 is selected from the following groups:
- Ar 2 , Ar 3 , and Ar 4 each independently represent a substituted or unsubstituted aromatic group or heteroaromatic group with 6-30 ring atoms; in a certain embodiment, Ar 2 , Ar 3 , and Ar 4 in the general formula (1) each independently represent a substituted or unsubstituted phenyl group; in an embodiment, Ar 2 , Ar 3 , and Ar 4 in the general formula (1) are at least There is one fused ring aromatic group or fused ring heteroaromatic group selected from substituted or unsubstituted 10-30; in an embodiment, at least one of Ar 2 , Ar 3 , and Ar 4 in the general formula (1) 10-15 fused ring aromatic groups selected from substituted or unsubstituted; in an embodiment, in the general formula (1), at least two of Ar 2 , Ar 3 , and Ar 4 are selected from substituted or unsubstituted 10 ⁇ 30 fused ring aromatic groups or fused ring heteroaromatic groups; in
- substitution refers to further substitution by R', and R'has the same meaning as R 1 .
- Ar 2 , Ar 3 , and Ar 4 in the general formula (1) are each independently selected from the following groups:
- X 1 is selected from CR 9 or N;
- Each occurrence of R 9 -R 10 is independently selected from H, D, or linear alkyl, alkoxy or thioalkoxy having 1 to 20 C atoms, or those having 3 to 20 C atoms A branched or cyclic alkyl, alkoxy or thioalkoxy group, or silyl group, or a keto group having 1 to 20 C atoms, or an alkoxycarbonyl group having 2 to 20 C atoms, Or aryloxycarbonyl, cyano, carbamoyl, haloformyl, formyl, isocyano, isocyanate, thiocyanate or isothiocyanate, hydroxyl, nitro with 7 to 20 C atoms, CF 3 , Cl, Br, F, I, crosslinkable groups, or substituted or unsubstituted aromatic groups or heteroaromatic groups with 5 to 60 ring atoms, or 5 to 60 ring atoms Aryloxy or heteroaryloxy groups, or a combination of these
- R 9 and R 10 may be connected to each other to form a ring structure together with the carbon atom connected to R 9 and R 10.
- Ar 2 , Ar 3 , and Ar 4 are each independently selected from the following groups:
- Ar 2 is benzene.
- at least one of Ar 3 and Ar 4 is a phenyl group.
- both Ar 3 and Ar 4 are phenyl groups, or one of Ar 3 and Ar 4 is phenyl and one is naphthyl.
- Ar 2 , Ar 3 , and Ar 4 are all selected from benzene, and the general formula (1) is selected from the following general formulas:
- At least one of Ar 2 , Ar 3 , and Ar 4 is selected from the following groups:
- At least one of Ar 2 , Ar 3 , and Ar 4 is selected from the following groups:
- the general formula (1) is selected from any structure in the following general formulas:
- Z 2 in the general formula (2) is selected from a single bond, NR 4 , C(R 4 R 5 ), O, S, or SO 2 ; more preferably, Z 2 is selected from a single bond.
- X in the general formula (2) is selected from CR 3 ; in a preferred embodiment, at least two adjacent R 3 are bonded to each other to form a ring; in a preferred embodiment In, two adjacent R 3 are bonded to each other to form structure;
- Z 2 , Z 3 , and Z 4 are each independently selected from: NR 4 , C(R 4 R 5 ), O, S or SO 2 ;
- n 1 is selected from 0, 1, 2, 3, or 4; n 2 is selected from 0, 1, 2, or 3.
- At least two adjacent R 3 are bonded to each other to form a ring.
- the general formula (2) is selected from the following general formulas:
- X is selected from CR 3 .
- the general formula (2) is selected from the following general formulas:
- n is selected from 1; in another embodiment, n is selected from 3.
- n1 when n1 appears multiple times, all are selected from 0;
- n1 when n1 occurs multiple times, at least one is selected from 1.
- Each occurrence of R 3 -R 5 is preferably from: H, D, or a linear alkyl group having 1 to 10 C atoms, or a branched or cyclic alkyl group having 3 to 10 C atoms, or A substituted or unsubstituted aromatic group or heteroaromatic group having 5 to 30 ring atoms, or a combination of these systems.
- R 3 is selected from: H or phenyl or carbazolyl; and when there are multiple R 3 , the multiple R 3 are the same or different from each other.
- L 1 is selected from: a single bond or the following groups:
- X 2 is selected from CR 11 or N;
- R 11 -R 12 is independently selected from H, D, or linear alkyl, alkoxy or thioalkoxy having 1 to 20 C atoms, or those having 3 to 20 C atoms A branched or cyclic alkyl, alkoxy or thioalkoxy group, or silyl group, or a keto group having 1 to 20 C atoms, or an alkoxycarbonyl group having 2 to 20 C atoms, Or aryloxycarbonyl, cyano, carbamoyl, haloformyl, formyl, isocyano, isocyanate, thiocyanate or isothiocyanate, hydroxyl, nitro with 7 to 20 C atoms, CF 3 , Cl, Br, F, I, crosslinkable groups, or substituted or unsubstituted aromatic groups or heteroaromatic groups with 5 to 60 ring atoms, or 5 to 60 ring atoms Aryloxy or heteroaryloxy groups, or a combination of these systems
- R 11 is selected from H, D, or linear alkyl having 1 to 10 C atoms, or branched or cyclic alkyl having 3 to 10 C atoms, or having 5 to A substituted or unsubstituted aromatic group or heteroaromatic group of 30 ring atoms, or a combination of these systems.
- L 1 is a single bond or the following group:
- n 1, 2 or 3.
- the phosphorescent host material according to the present invention can be used for H1 examples as follows, and is not limited to:
- the phosphorescent host material according to the present invention can be used for H2 examples as follows, and is not limited to:
- the difference between the molecular weights of H1 and H2 is not more than 100 Dalton, preferably not more than 80 Dalton, more preferably not more than 70 Dalton, more preferably not more than 60 Dalton, very It is better not to exceed 40 Dalton, preferably not more than 30 Dalton.
- the phosphorescent host material wherein the difference between the sublimation temperature of H1 and H2 is not more than 50K; the more preferred sublimation temperature difference is not more than 30K; the more preferred sublimation temperature difference is not more than 20K ; The most preferred sublimation temperature difference does not exceed 10K.
- At least one of H1 and H2 in the phosphorescent host material according to the present invention has a glass transition temperature T g ⁇ 100°C, and in a preferred embodiment, at least one of which has a T g ⁇ 120 °C, in a more preferred embodiment, at least one has a T g ⁇ 140°C, in a more preferred embodiment, at least one has a T g ⁇ 160°C, in a most preferred embodiment, At least one has a T g ⁇ 180°C.
- the phosphorescent host material according to the present invention is used in vapor deposition OLED devices.
- the H1 and H2 according to the present invention have a molecular weight ⁇ 1000 mol/kg, preferably ⁇ 900 mol/kg, very preferably ⁇ 850 mol/kg, more preferably ⁇ 800 mol/kg, and most preferably ⁇ 700 mol/kg.
- the phosphorescent host material according to the present invention may further include an organic functional material, and the organic functional material includes hole (also called hole) injection or transport material (HIM/HTM), hole blocking material ( HBM), electron injection or transport materials (EIM/ETM), electron blocking materials (EBM), organic host materials (Host), singlet emitters (fluorescent emitters), organic thermally excited delayed fluorescent materials (TADF materials), Triplet emitters (phosphorescent emitters) are especially light-emitting organometallic complexes, and organic dyes.
- hole also called hole injection or transport material
- HBM hole blocking material
- EIM/ETM electron injection or transport materials
- EBM electron blocking materials
- organic host materials Host
- singlet emitters fluorescent emitters
- TADF materials organic thermally excited delayed fluorescent materials
- Triplet emitters phosphorescent emitters
- organic functional materials are described in detail in WO2010135519A1, US20090134784A1 and WO2011110277A1, and the entire contents of these 3 patent documents are
- the present invention further relates to a composition
- a composition comprising at least one phosphorescent host material as described above and at least one organic solvent.
- the at least one organic solvent is selected from aromatic or heteroaromatic, ester, aromatic ketone or aromatic ether, aliphatic ketone or aliphatic ether, alicyclic or olefin compound, or borate or phosphoric acid Ester compounds, or a mixture of two or more solvents.
- the at least one organic solvent is selected from aromatic or heteroaromatic-based solvents.
- aromatic or heteroaromatic solvents suitable for the present invention include, but are not limited to: p-diisopropylbenzene, pentylbenzene, tetralin, cyclohexylbenzene, chloronaphthalene, 1,4-dimethylnaphthalene , 3-isopropylbiphenyl, p-cymene, dipentylbenzene, tripentylbenzene, pentyltoluene, o-diethylbenzene, m-diethylbenzene, p-diethylbenzene, 1,2,3,4 -Tetramethylbenzene, 1,2,3,5-tetramethylbenzene, 1,2,4,5-tetramethylbenzene, butylbenzene, dodecylbenzene, dihexylbenzene, dibutylbenzene, p-diisopropylbenzene , Cyclohexylbenzen
- aromatic ketone-based solvents suitable for the present invention include, but are not limited to: 1-tetralone, 2-tetralone, 2-(phenylepoxy)tetralone, 6-(methoxy) Base) tetralone, acetophenone, phenylacetone, benzophenone, and their derivatives, such as 4-methylacetophenone, 3-methylacetophenone, 2-methylacetophenone, 4-methylpropiophenone, 3-methylpropiophenone, 2-methylpropiophenone, etc.;
- aromatic ether-based solvents suitable for the present invention include, but are not limited to: 3-phenoxytoluene, butoxybenzene, p-anisaldehyde dimethyl acetal, tetrahydro-2-phenoxy-2H -Pyran, 1,2-dimethoxy-4-(1-propenyl)benzene, 1,4-benzodioxane, 1,3-dipropylbenzene, 2,5-dimethoxy Toluene, 4-ethyl ethyl ether, 1,3-dipropoxybenzene, 1,2,4-trimethoxybenzene, 4-(1-propenyl)-1,2-dimethoxybenzene, 1, 3-Dimethoxybenzene, glycidyl phenyl ether, dibenzyl ether, 4-tert-butyl anisole, trans-p-propenyl anisole, 1,2-dimethoxybenzene, 1-methyl Oxynaphthalene,
- the at least one solvent may be selected from: aliphatic ketones, for example, 2-nonanone, 3-nonanone, 5-nonanone, 2 -Decanone, 2,5-hexanedione, 2,6,8-trimethyl-4-nonanone, fenchone, phorone, isophorone, di-n-amyl ketone, etc.; or aliphatic ether , For example, amyl ether, hexyl ether, dioctyl ether, ethylene glycol dibutyl ether, diethylene glycol diethyl ether, diethylene glycol butyl methyl ether, diethylene glycol dibutyl ether, triethylene glycol dimethyl ether, Triethylene glycol ethyl methyl ether, triethylene glycol butyl methyl ether, tripropylene glycol dimethyl ether, tetraethylene glycol dimethyl ether, etc.
- aliphatic ketones for example, 2-nonanone
- the at least one solvent may be selected from ester-based solvents: alkyl octanoate, alkyl sebacate, alkyl stearate, benzene Alkyl formate, alkyl phenylacetate, alkyl cinnamate, alkyl oxalate, alkyl maleate, alkyl lactone, alkyl oleate, etc.
- ester-based solvents alkyl octanoate, alkyl sebacate, alkyl stearate, benzene Alkyl formate, alkyl phenylacetate, alkyl cinnamate, alkyl oxalate, alkyl maleate, alkyl lactone, alkyl oleate, etc.
- Particularly preferred are octyl octanoate, diethyl sebacate, diallyl phthalate, and isononyl isononanoate.
- the solvent can be used alone or as a mixture of two or more organic solvents.
- a composition according to the present invention is characterized in that it contains at least one organic compound or polymer or mixture as described above and at least one organic solvent, and may further contain another An organic solvent.
- another organic solvent include (but are not limited to): methanol, ethanol, 2-methoxyethanol, dichloromethane, chloroform, chlorobenzene, o-dichlorobenzene, tetrahydrofuran, anisole, morpholine, Toluene, o-xylene, m-xylene, p-xylene, 1,4 dioxane, acetone, methyl ethyl ketone, 1,2 dichloroethane, 3-phenoxy toluene, 1,1 ,1-Trichloroethane, 1,1,2,2-tetrachloroethane, ethyl acetate, butyl acetate, dimethylformamide, dimethylacetamide, dimethylsulfoxide, tetral
- the solvent that is particularly suitable for the present invention is a solvent whose Hansen solubility parameter is within the following range:
- ⁇ d (dispersion force) is in the range of 17.0-23.2MPa 1/2 , especially in the range of 18.5-21.0MPa 1/2;
- ⁇ p polar forces in the range of 0.2 ⁇ 12.5MPa 1/2, especially in the 2.0 ⁇ 6.0MPa 1/2;
- the organic solvent needs to consider its boiling point parameter when selecting it.
- the boiling point of the organic solvent is ⁇ 150°C; preferably ⁇ 180°C; more preferably ⁇ 200°C; more preferably ⁇ 250°C; most preferably ⁇ 275°C or ⁇ 300°C. Boiling points in these ranges are beneficial to prevent nozzle clogging of inkjet print heads.
- the organic solvent can be evaporated from the solvent system to form a film containing functional materials.
- the composition according to the invention is a solution.
- composition according to the invention is a suspension.
- the present invention also relates to the use of the composition as a coating or printing ink in the preparation of organic electronic devices, and the preparation method by printing or coating is particularly preferred.
- suitable printing or coating technologies include (but are not limited to) inkjet printing, nozzle printing, letterpress printing, screen printing, dip coating, spin coating, doctor blade coating, roller printing, and twisting roller Printing, offset printing, flexographic printing, rotary printing, spraying, brushing or pad printing, slit-type extrusion coating, etc.
- the first choice is gravure printing, jet printing and inkjet printing.
- the solution or suspension may additionally include one or more components such as surface active compounds, lubricants, wetting agents, dispersants, hydrophobic agents, adhesives, etc., for adjusting viscosity, film-forming properties, and improving adhesion.
- Related printing technology, and related requirements for related solutions such as solvent and concentration, viscosity, etc.
- the present invention also provides an application of the phosphorescent host material or composition described above in an organic electronic device.
- the organic electronic device can be selected from, but not limited to, organic light-emitting diodes (OLED), organic photovoltaic cells (OPV ), Organic Light Emitting Battery (OLEEC), Organic Field Effect Tube (OFET), Organic Light Emitting Field Effect Tube, Organic Laser, Organic Spintronic Device, Organic Sensor and Organic Plasmon Emitting Diode (Organic Plasmon Emitting Diode), etc., Particularly preferred is OLED.
- the phosphorescent host material is preferably used in the light-emitting layer of the OLED device.
- the present invention further relates to an organic electronic device comprising at least one phosphorescent host material or composition as described above.
- the organic electronic device includes at least one functional layer, and the functional layer includes a phosphorescent host material as described above.
- the functional layer is selected from the group consisting of hole injection layer (HIL), hole transport layer (HTL), light emitting layer (EML), electron blocking layer (EBL), electron injection layer (EIL), electron transport layer (ETL), air Hole Blocking Layer (HBL); preferably, an organic electronic device comprising a light-emitting layer, and the host material of the light-emitting layer is selected from the phosphorescent host materials described above.
- the organic electronic device according to the present invention at least includes a cathode, an anode, and a light-emitting layer located between the cathode and the anode, and the material of the light-emitting layer includes a host material and a light-emitting material.
- the organic electronic device according to the present invention is a phosphorescent light-emitting device.
- the phosphorescent light-emitting device described above especially the phosphorescent OLED, includes a substrate, an anode, and at least one light-emitting layer.
- the light-emitting layer material includes a host material and a phosphorescent light-emitting material, and the host material is selected from the group of the present invention.
- the phosphorescent host material a cathode.
- the substrate can be opaque or transparent.
- a transparent substrate can be used to make a transparent light-emitting component.
- the substrate can be rigid or elastic.
- the substrate can be plastic, metal, semiconductor wafer or glass.
- the substrate has a smooth surface.
- a substrate without surface defects is a particularly ideal choice.
- the substrate is flexible and can be selected from polymer films or plastics. Its glass transition temperature Tg is above 150°C, preferably more than 200°C, more preferably more than 250°C, and most preferably Over 300°C. Examples of suitable flexible substrates are poly(ethylene terephthalate) (PET) and polyethylene glycol (2,6-naphthalene) (PEN).
- the anode may include a conductive metal or metal oxide, or a conductive polymer.
- the anode can easily inject holes into the hole injection layer (HIL) or the hole transport layer (HTL) or the light emitting layer.
- the absolute value of the difference between the work function of the anode and the luminous body in the light-emitting layer or the HOMO energy level or the valence band energy level of the p-type semiconductor material as HIL or HTL or electron blocking layer (EBL) is less than 0.5 eV, preferably less than 0.3 eV, most preferably less than 0.2 eV.
- anode materials include but are not limited to: Al, Cu, Au, Ag, Mg, Fe, Co, Ni, Mn, Pd, Pt, ITO, aluminum doped zinc oxide (AZO), and the like.
- suitable anode materials are known, and those of ordinary skill in the art can easily select and use them.
- the anode material can be deposited using any suitable technique, such as a suitable physical vapor deposition method, including radio frequency magnetron sputtering, vacuum thermal evaporation, electron beam (e-beam), and the like.
- the anode is patterned and structured. Patterned ITO conductive substrates are commercially available and can be used to prepare devices according to the present invention.
- the cathode may include a conductive metal or metal oxide.
- the cathode can easily inject electrons into the EIL or ETL or directly into the light-emitting layer.
- the work function of the cathode and the LUMO energy level of the luminous body in the light-emitting layer or the n-type semiconductor material as the electron injection layer (EIL) or the electron transport layer (ETL) or the hole blocking layer (HBL) or
- the absolute value of the difference in conduction band energy level is less than 0.5 eV, preferably less than 0.3 eV, and most preferably less than 0.2 eV.
- all materials that can be used as the cathode of an OLED can be used as the cathode material of the device of the invention.
- cathode materials include, but are not limited to: Al, Au, Ag, Ca , Ba, Mg, LiF / Al, MgAg alloy, BaF 2 / Al, Cu, Fe, Co, Ni, Mn, Pd, Pt, ITO and the like.
- the cathode material can be deposited using any suitable technique, such as a suitable physical vapor deposition method, including radio frequency magnetron sputtering, vacuum thermal evaporation, electron beam (e-beam), and the like.
- Phosphorescent emitter materials are also called triplet emitter materials.
- the phosphorescent emitter material is a metal complex with the general formula M(L')q, where M is a metal atom, and L'can be the same or different each time it appears. It is an organic ligand, which is One or more positions are bonded or coordinated to the metal atom M, and q is an integer between 1 and 6.
- the triplet luminophore contains a chelating ligand, that is, a ligand, which is coordinated to the metal through at least two binding points. It is particularly preferred that the triplet luminophore contains two or three identical or different doubles. Tooth or multidentate ligands. Chelating ligands help to improve the stability of metal complexes.
- the metal complexes that can be used as triplet emitters have the following forms:
- the metal atom M is selected from transition metal elements or lanthanides or actinides, preferably Ir, Pt, Pd, Au, Rh, Ru, Os, Re, Cu, Ag, Ni, Co, W or Eu, especially preferred Ir, Au, Pt, W or Os.
- Ar 1 and Ar 2 can be the same or different each time they appear, and they are a cyclic group.
- Ar 1 and Ar 2 each independently represent a substituted or unsubstituted aromatic group or heteroaromatic group with 6-30 ring atoms Group; where Ar 1 contains at least one donor atom, that is, an atom with a lone pair of electrons, such as nitrogen, through its cyclic group and the metal coordination connection; where Ar 2 contains at least one carbon atom, through its cyclic group The group is connected to the metal; Ar 1 and Ar 2 are linked together by a covalent bond, and can each carry one or more substituent groups, and they can also be linked together through a substituent group; L'can be the same each time it appears Or different, it is a bidentate chelating auxiliary ligand, preferably a monoanionic bidentate chelating ligand; q1 can be 0,1,2 or 3, preferably 2 or 3; q2 can be 0,1 , 2 or 3, preferably 1 or 0.
- organic ligands may be selected from phenylpyridine derivatives or 7,8-benzoquinoline derivatives. All these organic ligands may be substituted, for example by alkyl chains or fluorine or silicon.
- the auxiliary ligand may preferably be selected from acetone acetate or picric acid.
- triplet emitters Some examples of materials and applications of triplet emitters can be found in the following patent documents and documents: WO0070655 (A2), WO0141512 (A1), WO0202714A2, WO0215645 (A1), WO2005033244, WO2005019373, US20050258742, US20070087219, US20070252517, US2008027220, WO2009146770, US20090061681, WO2009118087, WO2010015307, WO2010054731, WO2011157339, WO2012007087, WO2013107487, WO2013094620, WO2013174471, WO2014031977, WO2014112450, WO2014007565, WO2014024131, Baldo et al.
- OLED can also contain other functional layers, such as hole injection layer (HIL), hole transport layer (HTL), electron blocking layer (EBL), electron injection layer (EIL), electron transport layer (ETL), hole blocking layer (HBL).
- HIL hole injection layer
- HTL hole transport layer
- EBL electron blocking layer
- EIL electron injection layer
- ETL electron transport layer
- HBL hole blocking layer
- the light-emitting device has a light-emitting wavelength between 300 and 1000 nm, preferably between 350 and 900 nm, and more preferably between 400 and 800 nm.
- the present invention also relates to the application of the electroluminescent device according to the present invention in various electronic equipment, including, but not limited to, display equipment, lighting equipment, light sources, sensors and the like.
- H1 is selected from the following structures:
- H2 is selected from the following structures:
- the energy levels of organic compound materials can be obtained through quantum calculations, such as Gaussian09W (Gaussian Inc.) using TD-DFT (Time-dependent Density Functional Theory), and the specific simulation method can be found in WO2011141110.
- the semi-empirical method “Ground State/Semi-empirical/Default Spin/AM1" (Charge 0/Spin Single) is used to optimize the molecular geometry, and then the energy structure of organic molecules is determined by the TD-DFT (time-dependent density functional theory) method Calculate "TD-SCF/DFT/Default Spin/B3PW91" and base set “6-31G(d)” (Charge 0/Spin Single).
- HOMO and LUMO energy levels are calculated according to the following calibration formula, S1, T1 and resonance factor f(S1) are used directly.
- HOMO(eV) ((HOMO(G) ⁇ 27.212)-0.9899)/1.1206
- HOMO(G) and LUMO(G) are the direct calculation results of Gaussian 09W, and the unit is Hartree.
- the results are shown in Table 1:
- the host materials shown in Table 2 are used as the common host material, the Emitter-G shown in the figure below is used as the luminescent material, HATCN is used as the hole injection material, and HTL is used as the hole transport material. ETM is used as an electron transport material, and Liq is used as an electron injection material.
- the device structure is ITO/HATCN/HTL/host material: Emitter-G (10%)/ETM: Liq/Liq/Al.
- compounds (1-49): (2-11), (1-60): (2-9), (1-72): (2-9) and (1-100) are used respectively : (2-9)
- Emitter-R is used as a luminescent material
- HATCN is used as a hole injection material
- HTL is used as a hole transport material
- ETM is used as an electron transport material
- Liq is used as an electron injection material to construct a device
- ITO/HATCN/HTL/host material Emitter-R (3%)/ETM: Liq/Liq/Al electroluminescent device.
- the preparation process of the above-mentioned OLED device is described in detail below through specific examples.
- the structure of the OLED device is: ITO/HATCN/HTL/host material: Emitter/ETM:Liq/Liq/Al, and the preparation steps are as follows:
- ITO Indium Tin Oxide
- conductive glass substrate Use various solvents (such as one or more of chloroform, acetone or isopropanol) to clean, and then perform UV ozone treatment;
- HATCN (30nm), HTL (50nm), host material: Emitter (40nm), ETM: Liq (30nm), Liq (1nm), Al (100nm) heat in high vacuum (1 ⁇ 10 -6 mbar) Vapor-deposited
- Encapsulation The device is encapsulated with UV-curing resin in a nitrogen glove box.
- Characterization equipment was used to test the current-voltage (J-V) characteristics of the organic light-emitting diodes of Examples 1-8 and Comparative Examples 1-2 of the green light device, while recording important parameters such as efficiency, lifetime (see Table 2) and external quantum efficiency.
- J-V current-voltage
- Table 2 all external quantum efficiencies and lifetimes are relative values to the organic light emitting diode of Example 1. It can be seen that the external quantum efficiency and lifetime of the device are improved to a certain extent in the embodiment based on the present invention compared to the comparative example, and the luminous efficiency and lifetime of the device based on embodiment 1 are the highest among devices of the same type. It can be seen that the green light devices prepared based on the compounds and mixtures of the present invention have been greatly improved in terms of efficiency and lifetime.
- Example 7 (1-72): (2-9) 5:5 (mass ratio) 1.52 2.9
- Characterization equipment was used to test the current-voltage (J-V) characteristics of the organic light-emitting diodes of Examples 10-13 and Comparative Examples 3-4 of the red light device, while recording important parameters such as efficiency, lifetime (see Table 3) and external quantum efficiency.
- J-V current-voltage
- Table 3 all external quantum efficiencies and lifetimes are relative values with respect to the organic light emitting diode of Example 3. It can be seen that the external quantum efficiency and lifetime of the device are improved to a certain extent in the embodiment based on the present invention compared to the comparative example, and the luminous efficiency and lifetime of the device based on embodiment 13 are the highest among devices of the same type. It can be seen that the red light devices prepared based on the compounds and mixtures of the present invention are greatly improved in terms of efficiency and lifetime.
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Abstract
Description
OLED器件 | 主体材料 | EQE | T90@1000nits |
实施例1 | (1-3):(2-27)=5:5(质量比) | 1.66 | 4.5 |
实施例2 | (1-30):(2-67)=5:5(质量比) | 1.56 | 3.3 |
实施例3 | (1-50):(2-36)=5:5(质量比) | 1.63 | 4.0 |
实施例4 | (1-89):(2-36)=5:5(质量比) | 1.41 | 2.2 |
实施例5 | (1-97):(2-21)=5:5(质量比) | 1.48 | 2.7 |
实施例6 | (1-60):(2-27)=5:5(质量比) | 1.53 | 3.0 |
实施例7 | (1-72):(2-9)=5:5(质量比) | 1.52 | 2.9 |
实施例8 | (1-100):(2-36)=5:5(质量比) | 1.60 | 3.8 |
对比例1 | (1-30) | 1 | 1 |
对比例2 | Ref-1 | 1.2 | 1.6 |
OLED器件 | 主体材料 | EQE | T90@1000nits |
实施例10 | (1-49):(2-11)=5:5(质量比) | 1.51 | 2.8 |
实施例11 | (1-72):(2-9)=5:5(质量比) | 1.59 | 3.6 |
实施例12 | (1-60):(2-9)=5:5(质量比) | 1.65 | 4.2 |
实施例13 | (1-100):(2-9)=5:5(质量比) | 1.70 | 4.7 |
对比例3 | (1-49) | 1 | 1 |
对比例4 | Ref-2 | 1.23 | 1.7 |
Claims (18)
- 一种磷光主体材料,至少包含一种N型主体材料H1及一种P型主体材料H2,其特征在于,所述N型主体材料H1选自如通式(1)所示的结构:其中:Ar 1选自取代或未取代的环原子数为6-60的芳香基团或杂芳香基团,且Ar 1至少包含一个缺电子基团;Ar 2、Ar 3、Ar 4分别独立表示取代或未取代的环原子数为6~30的芳香基团或杂芳香基团,N和Ar 3的连接位置可以是Ar 3上的任意一碳原子上;Z 1选自C(R 1R 2)、Si(R 1R 2)、O、C=NR 1、C=C(R 1R 2)、PR 1、P(=O)R 1、S、S=O或SO 2;所述P型主体材料H2选自如通式(2)所示的结构:其中:n选自1、2、3或4;X每次出现时,独立选自CR 3或N;Z 2、Z 3、Z 4各自独立选自:无、单键、NR 4、C(R 4R 5)、Si(R 4R 5)、O、C=O、C=NR 4、C=C(R 4R 5)、PR 4、P(=O)R 4、S、S=O或SO 2,其中Z 3、Z 4不同时为无;L 1选自:单键、环原子数为5~30的芳香基团或环原子数为5~30的芳杂基团,L 1的连接位置可以是环上任意一碳原子上;R 1-R 5每次出现时相同或不同,R 1-R 5各自独立选自H、D、具有1至20个C原子的直链烷基、具有1至20个C原子的烷氧基、具有1至20个C原子的硫代烷氧基、具有3至20个C原子的支链烷基、具有3至20个C原子的环状烷基、具有3至20个C原子的烷氧基、具有3至20个C原子的硫代烷氧基、甲硅烷基、具有1至20个C原子的酮基、具有2至20个C原子的烷氧基羰基、具有7至20个C原子的芳氧基羰基、氰基、氨基甲酰基、卤甲酰基、甲酰基、异氰基、异氰酸酯、硫氰酸酯、异硫氰酸酯、羟基、硝基、CF 3、Cl、Br、F、I、可交联的基团、具有5至60个环原子的取代或未取代的芳香基团、具有5至60个环原子的取代或未取代的杂芳香基团、具有5至60个环原子的芳氧基或具有5至60个环原子的杂芳氧基基团,或这些体系的组合。
- 根据权利要求1所示的磷光主体材料,其特征在于:min(LUMO(H1)-HOMO(H2),LUMO(H2)-HOMO(H1))≤min(E T(H1),E T(H2))+0.1eV;其中:LUMO(H1)表示H1的最低未占有轨道能级,HOMO(H1)表示H1的最高占有轨道能级,E T(H1)表示H1的三重态能级;LUMO(H2)表示H2的最低未占有轨道能级,HOMO(H2)表示H2的最高占有轨道能级,E T(H2)表示H2的三重态能级。
- 根据权利要求2所述的磷光主体材料,其特征在于:min(LUMO(H1)-HOMO(H2),LUMO(H2)-HOMO(H1))在1.9eV-3.1eV范围内。
- 根据权利要求2所述的磷光主体材料,其特征在于:min(LUMO(H1)-HOMO(H2),LUMO(H2)-HOMO(H1))在2.4eV-2.7eV范围内。
- 根据权利要求1所示的磷光主体材料,其特征在于:Ar 1至少包含一个缺电子基团,所述缺电子基团选自:F、氰基或如下基团中的一种或多种:其中:n1表示1、2或3;W选自CR 6或N,并且至少有一个是N;Y选自NR 7、C(R 7R 8)、Si(R 7R 8)、O、S、S=O、S(=O) 2;M 1、M 2、M 3分别独立表示NR 7、C(R 7R 8)、Si(R 7R 8)、O、C=C(R 7R 8)、PR 7、P(=O)R 7、S、S=O、S(=O) 2或无;R 6-R 8每次出现时相同或不同,R 6-R 8各自独立地选自:H、D、具有1至20个C原子的直链烷基、具有1至20个C原子的烷氧基或具有1至20个C原子的硫代烷氧基、具有3至20个C原子的支链烷基、具有3至20个C原子的环状烷基、具有3至20个C原子的烷氧基、具有3至20个C原子的硫代烷氧基、甲硅烷基、具有1至20个C原子的酮基、具有2至20个C原子的烷氧基羰基、具有7至20个C原子的芳氧基羰基、氰基、氨基甲酰基、卤甲酰基、甲酰基、异氰基、异氰酸酯、硫氰酸酯或异硫氰酸酯、羟基、硝基、CF 3、Cl、Br、F、I、可交联的基团、具有5至60个环原子的取代或未取代的芳香基团、具有5至60个环原子的取代或未取代的杂芳香基团、具有5至60个环原子的芳氧基或具有5至60个环原子的杂芳氧基基团,或这些体系的组合;*表示连接位点。
- 根据权利要求1所述的磷光主体材料,其特征在于:Ar 2、Ar 3、Ar 4选自如下基团:其中:X 1选自CR 9或N;Y 1选自NR 9、C(R 9R 10)、Si(R 9R 10)、O、S、S=O、S(=O) 2;R 9-R 10每次出现时相同或不同,R 9-R 10各自独立选自:H、D、具有1至20个C原子的直链烷基、具有1至20个C原子的烷氧基或具有1至20个C原子的硫代烷氧基、具有3至20个C原子的支链烷基、具有3至20个C原子的环状烷基、具有3至20个C原子的烷氧基、具有3至20个C原子的硫代烷氧基、甲硅烷基、具有1至20个C原子的酮基、具有2至20个C原子的烷氧基羰基、具有7至20个C原子的芳氧基羰基、氰基、氨基甲酰基、卤甲酰基、甲酰基、异氰基、异氰酸酯、硫氰酸酯或异硫氰酸酯、羟基、硝基、CF 3、Cl、Br、F、I、可交联的基团、具有5至60个环原子的取代或未取代的芳香基团、具有5至60个环原子的取代或未取代的杂芳香基团、具有5至60个环原子的芳氧基或具有5至60个环原子的杂芳氧基基团,或这些体系的组合。
- 根据权利要求11所述的磷光主体材料,其特征在于:至少有两个相邻的R 3互相键合成环。
- 根据权利要求11所述的磷光主体材料,其特征在于:R 4和R 5互相键合成环。
- 一种组合物,其特征在于:至少包含一种如权利要求1-15任一项所述的磷光主体材料及至少一种有机溶剂。
- 一种有机电子器件,其特征在于:包含一发光层,所述发光层主体材料包含有权利要求1-15任一项所述的磷光主体材料。
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