WO2008010487A1 - Matériau électronique organique, dispositif électronique organique et dispositif électroluminescent organique - Google Patents
Matériau électronique organique, dispositif électronique organique et dispositif électroluminescent organique Download PDFInfo
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- WO2008010487A1 WO2008010487A1 PCT/JP2007/064090 JP2007064090W WO2008010487A1 WO 2008010487 A1 WO2008010487 A1 WO 2008010487A1 JP 2007064090 W JP2007064090 W JP 2007064090W WO 2008010487 A1 WO2008010487 A1 WO 2008010487A1
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- UCBCBMOOIZMOTR-UHFFFAOYSA-N pyrazine;pyridine Chemical compound C1=CC=NC=C1.C1=CN=CC=N1 UCBCBMOOIZMOTR-UHFFFAOYSA-N 0.000 description 1
- BXEMXLDMNMKWPV-UHFFFAOYSA-N pyridine Chemical compound C1=CC=NC=C1.C1=CC=NC=C1 BXEMXLDMNMKWPV-UHFFFAOYSA-N 0.000 description 1
- 125000000168 pyrrolyl group Chemical group 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 239000000376 reactant Substances 0.000 description 1
- 238000001226 reprecipitation Methods 0.000 description 1
- 238000007650 screen-printing Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000005394 sealing glass Substances 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 150000003967 siloles Chemical group 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000004528 spin coating Methods 0.000 description 1
- 238000010189 synthetic method Methods 0.000 description 1
- IFLREYGFSNHWGE-UHFFFAOYSA-N tetracene Chemical compound C1=CC=CC2=CC3=CC4=CC=CC=C4C=C3C=C21 IFLREYGFSNHWGE-UHFFFAOYSA-N 0.000 description 1
- PCCVSPMFGIFTHU-UHFFFAOYSA-N tetracyanoquinodimethane Chemical compound N#CC(C#N)=C1C=CC(=C(C#N)C#N)C=C1 PCCVSPMFGIFTHU-UHFFFAOYSA-N 0.000 description 1
- YLQBMQCUIZJEEH-UHFFFAOYSA-N tetrahydrofuran Natural products C=1C=COC=1 YLQBMQCUIZJEEH-UHFFFAOYSA-N 0.000 description 1
- VLLMWSRANPNYQX-UHFFFAOYSA-N thiadiazole Chemical compound C1=CSN=N1.C1=CSN=N1 VLLMWSRANPNYQX-UHFFFAOYSA-N 0.000 description 1
- 150000003553 thiiranes Chemical group 0.000 description 1
- NRYGNLJQFASBEF-UHFFFAOYSA-N thiophene-2,3-diol Chemical compound OC=1C=CSC=1O NRYGNLJQFASBEF-UHFFFAOYSA-N 0.000 description 1
- XOLBLPGZBRYERU-UHFFFAOYSA-N tin dioxide Chemical compound O=[Sn]=O XOLBLPGZBRYERU-UHFFFAOYSA-N 0.000 description 1
- 229910001887 tin oxide Inorganic materials 0.000 description 1
- 150000003852 triazoles Chemical class 0.000 description 1
- 125000006617 triphenylamine group Chemical group 0.000 description 1
- 238000005292 vacuum distillation Methods 0.000 description 1
- 229910052724 xenon Inorganic materials 0.000 description 1
- FHNFHKCVQCLJFQ-UHFFFAOYSA-N xenon atom Chemical compound [Xe] FHNFHKCVQCLJFQ-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G61/00—Macromolecular compounds obtained by reactions forming a carbon-to-carbon link in the main chain of the macromolecule
- C08G61/12—Macromolecular compounds containing atoms other than carbon in the main chain of the macromolecule
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G73/00—Macromolecular compounds obtained by reactions forming a linkage containing nitrogen with or without oxygen or carbon in the main chain of the macromolecule, not provided for in groups C08G12/00 - C08G71/00
- C08G73/02—Polyamines
- C08G73/026—Wholly aromatic polyamines
-
- 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
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B1/00—Conductors or conductive bodies characterised by the conductive materials; Selection of materials as conductors
- H01B1/06—Conductors or conductive bodies characterised by the conductive materials; Selection of materials as conductors mainly consisting of other non-metallic substances
- H01B1/12—Conductors or conductive bodies characterised by the conductive materials; Selection of materials as conductors mainly consisting of other non-metallic substances organic substances
- H01B1/124—Intrinsically conductive polymers
- H01B1/128—Intrinsically conductive polymers comprising six-membered aromatic rings in the main chain, e.g. polyanilines, polyphenylenes
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B33/00—Electroluminescent light sources
- H05B33/12—Light sources with substantially two-dimensional radiating surfaces
- H05B33/14—Light sources with substantially two-dimensional radiating surfaces characterised by the chemical or physical composition or the arrangement of the electroluminescent material, or by the simultaneous addition of the electroluminescent material in or onto the light source
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K85/00—Organic materials used in the body or electrodes of devices covered by this subclass
- H10K85/10—Organic polymers or oligomers
- H10K85/151—Copolymers
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K99/00—Subject matter not provided for in other groups of this subclass
-
- 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
- C09K2211/00—Chemical nature of organic luminescent or tenebrescent compounds
- C09K2211/14—Macromolecular compounds
- C09K2211/1441—Heterocyclic
- C09K2211/1483—Heterocyclic containing nitrogen and sulfur as heteroatoms
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K50/00—Organic light-emitting devices
- H10K50/10—OLEDs or polymer light-emitting diodes [PLED]
- H10K50/14—Carrier transporting layers
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K50/00—Organic light-emitting devices
- H10K50/10—OLEDs or polymer light-emitting diodes [PLED]
- H10K50/17—Carrier injection layers
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K85/00—Organic materials used in the body or electrodes of devices covered by this subclass
- H10K85/10—Organic polymers or oligomers
- H10K85/111—Organic polymers or oligomers comprising aromatic, heteroaromatic, or aryl chains, e.g. polyaniline, polyphenylene or polyphenylene vinylene
- H10K85/115—Polyfluorene; Derivatives thereof
Definitions
- the present invention relates to a material for organic electronics, and an organic electronics element and an organic electroluminescence element (hereinafter sometimes referred to as an organic EL element) using the material for organic electronics.
- Organic electronic devices are devices that perform electrical operations using organic substances, and are expected to exhibit features such as energy saving, low cost, and flexibility, and have become a conventional inorganic semiconductor mainly composed of silicon. It is attracting attention as an alternative technology.
- organic EL elements are attracting attention as applications for large-area solid-state light sources as an alternative to incandescent lamps and gas-filled lamps, for example. It is also attracting attention as the most powerful self-luminous display to replace liquid crystal displays (LCDs) in the flat panel display (FPD) field, and its commercialization is progressing.
- LCDs liquid crystal displays
- FPD flat panel display
- Organic EL elements are roughly classified into two types: low molecular organic EL elements and polymer organic EL elements. Compared to low-molecular-weight organic EL devices, which are made of high-molecular materials, the organic materials are composed of polymer materials. Because it is possible, it is an indispensable element for future large-screen organic EL displays.
- FIG. 1 shows an example of a multilayered organic EL element.
- the layer responsible for light emission is described as the light-emitting layer 1
- the layer in contact with the anode 2 is described as the hole injection layer 3
- the layer in contact with the cathode 4 is described as the electron injection layer 5.
- a different layer between the light emitting layer 1 and the hole injection layer 3 Is described as a hole transport layer 6, and when a different layer exists between the light emitting layer 1 and the electron injection layer 5, it is described as an electron transport layer 7.
- 8 is a substrate.
- the low molecular weight organic EL device is formed by vapor deposition, multilayering can be easily achieved by performing force vapor deposition without sequentially changing the compounds used.
- polymer-type organic EL elements are formed using a wet process such as printing or ink-jet, so in order to increase the number of layers, it is necessary not to change the already formed layer when forming a new layer. Is necessary.
- polystyrene sulfonic acid PDOT: PSS
- PDOT polystyrene sulfonic acid
- Most devices have a two-layer structure of the light-emitting layer that is formed using a solvent.
- the PEDOT: PSS layer does not dissolve in toluene, making it possible to produce a two-layer structure.
- Patent Document 1 U.S. Pat.No. 4,539,507
- Patent Document 2 U.S. Pat.No. 5, 151,629
- Patent Document 3 International Publication No. 90Z13148 Pamphlet
- Patent Document 4 European Patent Publication No. 0 443 861
- Non-Patent Document 1 Y. Goto, T. Hayashida, M. Noto, IDW '04 Procee dings of The 11th International Display Workshop, 1343-1346
- Non-Patent Document 2 Kengo Hirose, Daisuke Kumaki, Nobuaki Koike, Jun Kuriyama, Seiichiro Ikehata, Shizushi Tokito, 53rd Joint Conference on Applied Physics, 26P—ZK— 4 (2006)
- Non-Patent Document 3 H. Yan, P. Lee, N. R. Armstrong, A. Graham, G. A. Evmenenko, P. Dutta, T. J. Marks, J. Am. Chem. S oc., 127, 3172-4183 (2005)
- Non-Patent Document 4 T. Yamamoto, Bull. Chem. Soc. Jap., 51 ⁇ , No. 7, p. 2091 (1978)
- Non-Patent Document 5 M. Zembayashi ⁇ Tet. Lett., 47 ⁇ 4089 (1977)
- Non-Patent Document 6 Synthetic Communications, Vol. 11, No. 7, p. 513 (1
- an object of the present invention is to provide a material for organic electronics that can be easily multilayered. Furthermore, an object of the present invention is to provide an organic electronics element and an organic EL element having luminous efficiency and luminous lifetime superior to those of the prior art.
- the present invention is characterized by the following items (1) to (18).
- a material for organic electronics comprising a polymer or oligomer having one or more polymerizable substituents and a repeating unit having a hole transporting property.
- Ar to Ar are each independently a substituted or unsubstituted arylene group
- R 1 to R 3 each independently represents one R 1 -OR 2 , —SR 3 , one OCOR 4 ,
- To 11 represent a hydrogen atom, a linear, cyclic or branched alkyl group having 1 to 22 carbon atoms, or an aryl group or heteroaryl group having 2 to 30 carbon atoms, and a , B and c represent an integer of 1 or more.
- the polymer or oligomer having a polymerizable substituent group which is any one of an oxetane group, an epoxy group, a bur group, an attalylate group and a metatalylate group.
- the material for organic electronics according to (1) or (2).
- Ar to Ar are each independently a substituted or unsubstituted arylene group, hetero
- E and E represent a group having a polymerizable substituent
- R represents —R 1
- ⁇ To 11 represent a hydrogen atom, a linear, cyclic or branched alkyl group having 1 to 22 carbon atoms, or an aryl group or heteroaryl group having 2 to 30 carbon atoms, a , B and c represent an integer of 1 or more.
- Ar 1 to Ar 3 are each independently a substituted or unsubstituted arylene group, hetero
- E and E represent a group having a polymerizable substituent
- R and R represent
- To 11 represent a hydrogen atom, a linear, cyclic or branched alkyl group having 1 to 22 carbon atoms, or an aryl group or heteroaryl group having 2 to 30 carbon atoms, and a , B and c represent an integer of 1 or more.
- Ar to Ar are each independently a substituted or unsubstituted arylene group, hetero
- E and E represent a group having a polymerizable substituent
- R and R represent
- To 11 represent a hydrogen atom, a linear, cyclic or branched alkyl group having 1 to 22 carbon atoms, or an aryl group or heteroaryl group having 2 to 30 carbon atoms, and a , B and c represent an integer of 1 or more.
- Ar 1 to Ar 3 are each independently a substituted or unsubstituted arylene group, hetero
- E and E represent a group having a polymerizable substituent
- R represents —R 1
- Ar 1 to Ar 3 are each independently a substituted or unsubstituted arylene group, hetero
- E and E represent a group having a polymerizable substituent
- R and R represent
- To 11 represent a hydrogen atom, a linear, cyclic or branched alkyl group having 1 to 22 carbon atoms, or an aryl group or heteroaryl group having 2 to 30 carbon atoms, and a , B and c represent an integer of 1 or more.
- Ar 1 to Ar 4 are each independently a substituted or unsubstituted arylene group, hetero
- E and E represent a group having a polymerizable substituent
- R and R represent
- ⁇ To 11 represent a hydrogen atom, a linear, cyclic or branched alkyl group having 1 to 22 carbon atoms, or an aryl group or heteroaryl group having 2 to 30 carbon atoms, a , B and c represent an integer of 1 or more.
- An organic electroluminescence device comprising at least an anode, a hole injection layer, a light emitting layer and a cathode, wherein the hole injection layer is any one of (1) to (14) above.
- An organic electroluminescence element characterized by being a layer formed of a material for organic electronics.
- An organic electroluminescent device comprising at least an anode, a hole transport layer, a light emitting layer, and a cathode, wherein the hole transport layer is any one of (1) to (14) above.
- Organic electret characterized in that it is a layer formed of a material for organic electronics Loluminescence element.
- the organic electronic material of the present invention can form a thin film stably and easily, and the solubility is changed by a polymerization reaction, so that the organic thin film layer can be easily multi-layered. It is an extremely useful material for improving the luminous efficiency, lifetime, and productivity of electronic devices, especially polymer-type organic EL devices.
- FIG. 1 is a schematic diagram showing an example of a multilayered organic EL element.
- FIG. 2 is a 1H-NMR spectrum of monomer A synthesized in Monomer Synthesis Example 1.
- FIG. 3 is a 1H-NMR ⁇ vector of monomer B synthesized in Monomer Synthesis Example 2.
- FIG. 4 is a gel permeation chromatogram of oligomer B synthesized in oligomer synthesis example 2.
- FIG. 5 is a graph showing luminance and current efficiency characteristics of organic EL elements of Example 1 and Comparative Example 1.
- FIG. 6 is a graph showing the lifetime characteristics of the organic EL elements of Example 1 and Comparative Example 1.
- FIG. 7 is a luminance current efficiency characteristic graph of organic EL elements of Example 2, Example 3, and Comparative Example 2.
- FIG. 8 is a graph showing lifetime characteristics of organic EL elements of Example 2, Example 3, and Comparative Example 2.
- the material for organic electronics of the present invention is characterized by comprising a polymer or oligomer having a repeating unit having one or more polymerizable substituents and having a hole transporting property. It is.
- the “repeating unit having hole transportability” is an atomic group having the ability to transport holes, and the details thereof will be described below.
- the repeating unit having the hole transporting property is not particularly limited as long as it is a monomer unit having the ability to transport holes, but in particular, an amine structure having an aromatic ring.
- an amine structure having an aromatic ring For example, the following general formulas (la), (2a) 3 (3a) ⁇ (4a), (5a) ⁇ (6a) and the like can be mentioned.
- the arylene group is an atomic group obtained by removing two hydrogen atoms from an aromatic hydrocarbon
- the heteroaryl group is an atomic group obtained by removing two hydrogen atoms from an aromatic compound having a hetero atom. It is.
- the arylene group and heteroarylene group may be substituted or unsubstituted. Examples of arylene groups include phenol, biphenyl, diphenyl, naphthyl, naphthalene, tetracene, fluorene, phenanthrene, and heteroarylene.
- Examples of the group include pyridine pyridine, pyrazine pyridine, quinoline diol, isoquinoline diol, atalidine diol, phenanthrine linyl, furan diol, pyrrol diol, thiophene diol, oxazole diol, Oxadiazole, thiadiazole, triazole, benzoxazole, benzoxazole, benzothiadiazole, benzotriazole, benzothiophene, etc. That. Examples of the arylene group or heteroarylene group which may be substituted or unsubstituted are shown in the following structural formulas (1) to (30).
- the substituent R in the structural formulas (1) to (30) is not particularly limited.
- the above structural formulas (29) and (30) having a phenylene group, a fluorene-zyl group, a phenanthrene group, or a condensed ring structure are preferred.
- 1, m, and n are integers of 1 to 5, and are preferably integers of 2 to 4.
- a hole transport layer is used to efficiently confine electrons in the light emitting layer and improve the light emission efficiency. It is desirable that the LUMO level of the hole injection layer is high. From this viewpoint, the above structural formulas (29) and (30) having a polycyclic structure are more preferable.
- the polymer or oligomer used in the present invention may be a copolymerization repeat of the above arylene group or heteroarylene group in addition to the repeating unit having a hole transporting property in order to adjust solubility, heat resistance, and electrical characteristics.
- the copolymer which has as a unit may be sufficient.
- the copolymer may be a random, block or graft copolymer, or a polymer having an intermediate structure thereof, for example, a random copolymer having a block property.
- the polymer or oligomer used in the present invention may have a branch in the main chain and may have 3 or more terminal forces.
- the polymer or oligomer used in the present invention has one or more “polymerizable substituents”.
- the above-mentioned “polymerizable substituent” means two or more molecules by causing a polymerization reaction. This is a substituent capable of forming a bond between the above molecules, and the details will be described below.
- Examples of the polymerizable substituent include a group having a carbon-carbon multiple bond (for example, a vinyl group, an acetylene group, a butyl group, an acrylic group, an acrylate group, an acrylamide group, a methacryl group, a methacrylate group, a methacryl group).
- a group having a carbon-carbon multiple bond for example, a vinyl group, an acetylene group, a butyl group, an acrylic group, an acrylate group, an acrylamide group, a methacryl group, a methacrylate group, a methacryl group).
- Amide group arene group, allyl group, butyl ether group, uramino group, furyl group, pyrrole group, thiophene group, silole group, etc.), a group having a small ring (for example, cyclopropyl group, cyclobutyl group, An epoxy group, an oxetane group, a diketene group, an episulfide group, etc.), a rataton group, a ratatam group, or a group containing a siloxane derivative.
- combinations of groups capable of forming an ester bond or an amide bond can also be used.
- an ester group and an amino group for example, a combination of an ester group and an amino group, an ester group and a hydroxyl group, or the like.
- the polymerizable substituent in particular, oxetane group, epoxy group, vinyl group, attalylate group, and metatalylate group are preferable from the viewpoint of reactivity.
- the polymerizable substituent may be introduced as a side chain of the polymer or oligomer, or may be introduced at both the side chain and the terminal, which may be introduced at the terminal.
- a polymerizable substituent is introduced at the terminal of the polymer or oligomer, and the repeating unit having a hole transporting property is represented by the general formulas (la), (2a), (3a), (4 a), (5a),
- Examples of the polymer or oligomer in the present invention in the case of any one of (6a) include the following general formulas (7a), (8a) ⁇ (9a) ⁇ (10a), (11a) ⁇ (12a) Illustrated.
- R 1 12 represents a group having a polymerizable substituent, and R to R each independently represent —R—OR 2 ,
- To Shaku 11 represents a hydrogen atom, a linear, cyclic or branched alkyl group having 1 to 22 carbon atoms, or an aryl group or heteroaryl group having 2 to 30 carbon atoms, and a , B and c represent an integer of 1 or more, preferably an integer of 1 to 4, and n represents an integer of 1 or more.
- E to E are, for example, an alkyl group, an alkoxy group, an aryl group, an arylene group,
- a group having one or more polymerizable substituents bonded to a teloaryl group, heteroarylene group, or the like, and a group having an arylamine structure may be used.
- E to E are preferably
- n is preferably 2 or more and 100 or less 2 More preferable is 20 or less. If n is too small, the film-forming stability is lowered, and if it is too large, lamination is difficult because the change in solubility is small even if a polymerization reaction is carried out.
- the number average molecular weight of the polymer or oligomer used in the present invention is preferably 1,000 or more and 100,000 or less, and more preferably 1,000 or more and 10,000 or less. Yes. If the molecular weight is less than 1,000, the film-forming stability is lowered, and if it exceeds 100,000, even if a polymerization reaction is carried out, the change in solubility is small and it becomes difficult to laminate.
- the number average molecular weight of the polymer or oligomer is the number average molecular weight when measured in terms of polystyrene using gel permeation chromatography.
- the polydispersity of the polymer or oligomer used in the present invention is preferably greater than 1.0. 1. 1 or more and 5.0 or less is more preferred 1. 2 or more and 3.0 or less Most preferred. Perhaps If the dispersion is too small, aggregation tends to occur after film formation, and if it is too large, device characteristics tend to deteriorate.
- the polydispersity of the polymer or oligomer is (weight average molecular weight Z number average molecular weight) when measured in terms of polystyrene using gel permeation chromatography.
- the polymer or oligomer used in the present invention can be produced by various synthetic methods known to those skilled in the art.
- T. Yamamoto et al. Bull. Chem. Soc. Jap., 51., No. 7, 2091 (1978) and M. Zembayashi et al., Tet. Lett., 47-4089 (1977) can be used by A. Suzuki by Synthetic Communications , Vol. 11, No. 7, p. 513 (1981), is generally used for polymer production.
- This reaction causes a Pd-catalyzed cross-coupling reaction (usually called the “Suzuki reaction”) between an aromatic boronic acid derivative and an aromatic halide.
- the polymer or oligomer used in the present invention can be produced by using it in a reaction for bonding rings.
- This reaction also requires a soluble Pd complex in the form of a Pd (II) salt or a Pd (0) complex. 0.01 to 5 mole percent Pd (Ph P), tertiary phosphate, based on aromatic reactants
- Pd (OAc) 2 and PdCl (dppf) complexes with 3 4 in-ligands are generally preferred.
- This reaction also requires a base, with aqueous alkaline carbonate or bicarbonate being most preferred.
- the reaction can also be promoted in a nonpolar solvent using a phase transfer catalyst.
- a phase transfer catalyst As the solvent, N, N-dimethylformamide, toluene, azole, dimetho carten, tetrahydrofuran or the like is used.
- the organic electronics material of the present invention may further contain a polymerization initiator.
- the polymerization initiator is not particularly limited as long as it exhibits the ability to polymerize a polymerizable substituent by application of heat, light, microwave, radiation, electron beam or the like. It is more preferable that polymerization is initiated by light irradiation (hereinafter referred to as a photoinitiator).
- a photoinitiator 200nm force is also 800 It is not particularly limited as long as it exhibits the ability to polymerize a polymerizable substituent by irradiation with light of nm.
- the polymerizable substituent is an oxetane group
- a iodine salt a sulfone-um
- examples of the following compounds are preferred from the viewpoint of reactivity of salts and phthalene derivatives.
- the photoinitiator may be used in combination with a photosensitizer in order to improve photosensitivity.
- a photosensitizer examples include anthracene derivatives and thixanthone derivatives.
- the blending ratio of the polymerization initiator is 0. 0% with respect to the total weight of the organic electronics material.
- a range of 1% by weight or 10% by weight is preferred.
- a range of 0.2% to 8% by weight is more preferred.
- a range of 0.5 to 5% by weight is particularly preferred. . If the blending ratio of the polymerization initiator is less than 0.1% by weight, lamination tends to be difficult, and if it exceeds 10% by weight, device characteristics tend to deteriorate.
- the organic electronics material of the present invention may further contain a carbon material in addition to the above polymer or oligomer in order to adjust the electrical characteristics.
- a solution containing the organic electronics material of the present invention is treated with, for example, an inkjet method, Coating on a desired substrate by known methods such as casting, dipping, letterpress printing, intaglio printing, offset printing, flat printing, letterpress reverse printing, screen printing, gravure printing, and spin coating After It can be carried out by changing the solubility of the coating layer (curing) by advancing the polymerization reaction of the polymer or oligomer by light irradiation or heat treatment. By repeating such operations, it is possible to increase the number of polymer organic electronics elements and organic EL elements.
- the coating method as described above can be carried out usually in a temperature range of -20 to + 300 ° C, preferably 10 to 100 ° C, particularly preferably 15 to 50 ° C.
- the solvent used in the above solution is not particularly limited. Can be mentioned.
- a light source such as a low-pressure mercury lamp, a medium-pressure mercury lamp, a high-pressure mercury lamp, an ultrahigh-pressure mercury lamp, a metal halide lamp, a xenon lamp, a fluorescent lamp, a light-emitting diode, or sunlight
- the heat treatment can be carried out on a hot plate or in an oven, and can be carried out at a temperature range of 0 to + 300 ° C, preferably 20 to 250 ° C, particularly preferably 80 to 200 ° C. it can.
- the material for organic electronics of the present invention can be used alone as a functional material of an organic electronics element.
- the organic electronics material of the present invention may be used alone as a hole injection layer, a hole transport layer, an electron block layer, a light emitting layer, a hole block layer, an electron transport layer, or an electron injection layer of an organic EL element. Can do. Furthermore, it can be used for organic electronics elements and organic EL elements even when various additives are added.
- the additive examples include a metal complex containing a central metal such as Ir or Pt if used for a light emitting layer of an organic EL element, a triphenylamine derivative if used for a hole injection layer or a hole transport layer, An electron acceptor such as tetracyanoquinodimethane and various oxidizing agents can be used.
- a metal complex containing a central metal such as Ir or Pt if used for a light emitting layer of an organic EL element
- a triphenylamine derivative if used for a hole injection layer or a hole transport layer
- An electron acceptor such as tetracyanoquinodimethane and various oxidizing agents can be used.
- the organic electronics element and the organic EL element of the present invention are not particularly limited as long as the organic electronic element and the organic EL element of the present invention include a layer containing the organic electo-flux material of the present invention.
- the general structure of organic EL is disclosed in, for example, US Pat. No. 4,539,507, US Pat.No. 5,151,629, and polymer-containing organic EL
- the elements are disclosed in, for example, International Publication No. WO 90Z13148 and European Patent Publication No. 0443 861. These usually include an electroluminescent layer (light-emitting layer) between a cathode (anode) and an anode (anode) in which at least one of the electrodes is transparent.
- one or more electron injection layers and Z or electron transport layers are inserted between the electroluminescent layer (light emitting layer) and the force sword, one or more hole injection layers and Z or positive In some cases, a hole transport layer is inserted between the electroluminescent layer (light emitting layer) and the anode.
- the force sword material is preferably a metal or metal alloy such as Li, Ca, Mg, Al, In, Cs, Ba, Mg / Ag, LiF, and CsF.
- a metal for example, Au
- an oxide for example, ITO: indium oxide Z tin oxide
- a transparent substrate for example, glass or transparent polymer.
- the material for organic electronics of the present invention can be used as a hole injection layer, a hole transport layer, a light emitting layer, an electron transport layer, an electron injection layer, and the like of an organic electronics element.
- it is used as a hole injection layer, a hole transport layer, and a light-emitting layer that are preferably used as a hole injection layer, a hole transport layer, and a light-emitting layer of an organic EL device.
- the film thickness of these layers is not particularly limited, but is preferably 10 to 10 nm, more preferably 20 to 60 nm, and still more preferably 20 to 40 nm.
- FIG. 3 shows the 1H-NMR ⁇ vector of monomer B having a polymerizable substituent.
- oligomer B having a returning unit was obtained.
- the number average molecular weight of the obtained oligomer B was 3456 in terms of polystyrene, and the polydispersity was 1.48.
- Figure 4 shows the gel permeation matrix of oligomer B.
- PEDOT PSS dispersion liquid (Shtarck. Vitec, CH8000 LVW233) was spin-coated at 4000 rpm on a glass substrate patterned with ITO 1.6 mm wide, and dried by heating at 200 ° CZ for 10 minutes in air on a hot plate. Thus, a hole injection layer (40 nm) was formed. Subsequent experiments were performed in a dry nitrogen environment.
- a coating solution in which a photoinitiator (0.13 mg) represented by B (C 6 F 5 ) 4 and toluene (1.2 ml) are mixed is spin-coated at 3000 rpm, and then light is applied using a metal nitride lamp. Irradiation (3jZcm 2 ) was performed by heating on a hot plate at 180 ° C for 60 minutes to form a hole transport layer (40 nm). Next, the yellow light emitting polymer obtained in the above light emitting polymer synthesis example is formed on the hole transport layer.
- Ruen solution was spin-coated (1.5 wt 0/0) at 3000 rpm, heated 80 ° C, 5 minutes on a hot plate to form polymer light-emitting layer (thickness LOOnm).
- the hole transport layer and the light emitting layer could be laminated without dissolving each other.
- the obtained glass substrate was transferred into a vacuum vapor deposition machine, and electrodes were formed in the order of Ba (film thickness: 3 nm) and A1 (film thickness: lOOnm) on the light emitting layer.
- the substrate is moved into a dry nitrogen environment that is not exposed to the atmosphere, and a sealing glass obtained by adding 0.4 mm of Zadari to 0.7 mm non-alkali glass and an ITO substrate are subjected to photocuring. Sealing was performed by bonding with Poxy resin, and a multilayer organic EL device was fabricated. Subsequent experiments were conducted in the atmosphere at room temperature (25 ° C).
- Example 1 An organic EL device was produced in the same manner as in Example 1 except that the hole transport layer was not formed. When a voltage was applied to this organic EL device, yellow light emission was observed at about 5 V, the current efficiency at a luminance of 6 OOOcdZm 2 was 2.8 cdZA, and the efficiency of Example 1 was 1.9 times higher. It was. When the lifetime characteristics were measured, the luminance was reduced by half in 1.5 hours, and the lifetime of Example 1 was 20 times longer.
- FIG. 5 shows the luminance current efficiency characteristics of the organic EL elements of Example 1 and Comparative Example 1
- FIG. 6 shows the lifetime characteristics of the organic EL elements of Example 1 and Comparative Example 1.
- the oligomer A (4.4 mg) obtained in Oligomer Synthesis Example 1 and the photoinitiator used in Example 1 (0.13) were placed on a glass substrate patterned with a 1.6 mm width of ITO. mg) and toluene (500 1) were mixed and spin-coated at 3000 rpm. Just Then, it was irradiated with light (3jZcm 2 ) using a metal halide lamp, and cured by heating at 120 ° C. for 15 minutes and at 180 ° C. for 60 minutes to form a hole injection layer (50 nm).
- a toluene solution of a mixture of polymer 1 (75 parts by weight), polymer 2 (20 parts by weight) and polymer 3 (5 parts by weight) represented by the following structural formula on the hole injection layer ( 1. 0% by weight) was spin-coated at 3 OOOrpm, and heated on a hot plate at 80 ° C for 5 minutes to form a polymer light emitting layer (film thickness 80nm).
- the hole injection layer and the light emitting layer could be laminated without dissolving each other.
- a BaZAl electrode was formed and sealed in the same manner as in Example 1 to produce a polymer type organic EL device.
- An organic EL device was produced in the same manner as in Example 2 except that instead of oligomer A, oligomer E obtained in oligomer synthesis example 5 was used as the hole injection layer material. In this case, the hole injection layer and the light emitting layer could be laminated without dissolving each other.
- PEDOT PSS dispersion (Shtarck, manufactured by Vitec, CH8000 LVW233) is spin-coated at 4000 rpm on a glass substrate patterned with ITO 1.6 mm wide and hot. A hole injection layer (40 nm) was formed on the plate by heating and drying in air at 200 ° C. for 10 minutes. Thereafter, the light emitting layer was formed, the BaZAl electrode was formed and sealed in the same manner as in Example 2 to produce an organic EL device.
- the coating solution used to form the hole transport layer in Example 1 was spin-coated on a quartz substrate at 3 OOOrpm, and then irradiated with light (3jZcm 2 ) using a metal halide lamp.
- the first layer was produced by heating at 180 ° C for 60 minutes to cure.
- the film thickness of the first layer was 40 nm when measured with a stylus profilometer (XP-2 from AMBIOS).
- the toluene solution of the yellow light-emitting polymer used in Example 1 was spin-coated at 3000 rpm and heated on a hot plate at 80 ° C for 5 minutes to form a polymer light-emitting layer (film thickness lOOnm).
- film thickness lOOnm a polymer light-emitting layer
- the coating solution obtained by mixing the comparative polymer A (4.4 mg) obtained above, the photoinitiator (0.13 mg) used in Example 1 and toluene (1.2 ml) was spin-coated on a quartz substrate at 3000 rpm. After that, light irradiation (3jZcm 2 ) was performed using a metal nitride lamp and heated on a hot plate at 180 ° C. for 60 minutes to produce a first layer. The film thickness of this first layer was 40 nm.
- the toluene solution of the yellow light emitting polymer used in Example 1 was spin-coated at 3000 rpm. And heated on a hot plate at 80 ° C for 5 minutes to form a polymer light emitting layer (film thickness lOOnm). The total film thickness was measured and found to be lOOnm. That is, in Comparative Example 3, the first layer was dissolved, and it was difficult to produce a multilayer structure.
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Priority Applications (6)
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KR1020117003571A KR101164369B1 (ko) | 2006-07-19 | 2007-07-17 | 유기 일렉트로닉스용 재료, 유기 일렉트로닉스 소자 및 유기 일렉트로루미네센스 소자 |
US12/374,134 US8632892B2 (en) | 2006-07-19 | 2007-07-17 | Organic electronic material, organic electronic device, and organic electroluminescent device |
KR1020117003569A KR101256301B1 (ko) | 2006-07-19 | 2007-07-17 | 유기 일렉트로닉스용 재료, 유기 일렉트로닉스 소자 및 유기 일렉트로루미네센스 소자 |
KR1020117003570A KR101256281B1 (ko) | 2006-07-19 | 2007-07-17 | 유기 일렉트로닉스용 재료, 유기 일렉트로닉스 소자 및 유기 일렉트로루미네센스 소자 |
KR1020117003568A KR101164363B1 (ko) | 2006-07-19 | 2007-07-17 | 유기 일렉트로닉스용 재료, 유기 일렉트로닉스 소자 및 유기 일렉트로루미네센스 소자 |
JP2008525860A JPWO2008010487A1 (ja) | 2006-07-19 | 2007-07-17 | 有機エレクトロニクス用材料、有機エレクトロニクス素子および有機エレクトロルミネセンス素子 |
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JP (1) | JPWO2008010487A1 (ja) |
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KR20090023699A (ko) | 2009-03-05 |
KR20110036120A (ko) | 2011-04-06 |
JPWO2008010487A1 (ja) | 2009-12-17 |
KR101256301B1 (ko) | 2013-04-18 |
KR101256281B1 (ko) | 2013-04-18 |
KR101072098B1 (ko) | 2011-10-10 |
TWI379847B (en) | 2012-12-21 |
KR20110036119A (ko) | 2011-04-06 |
KR101164363B1 (ko) | 2012-07-09 |
US20090321723A1 (en) | 2009-12-31 |
US8632892B2 (en) | 2014-01-21 |
KR101164369B1 (ko) | 2012-07-09 |
KR20110033269A (ko) | 2011-03-30 |
TW200813110A (en) | 2008-03-16 |
KR20110033270A (ko) | 2011-03-30 |
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