Organic electronic material, ink composition containing same, and organic thin film, organic electronic element, organic electroluminescent element, lighting device, and display device formed therewith
View Patent ↗Provided are: an organic electronic material which can be easily multilayered and that can be used in substrates, such as resin, that cannot be processed at high temperatures; an ink composition containing the same; an organic thin film formed using said organic electronic material or said ink composition; and an organic electronic element and an organic EL element that are formed using said organic thin film and that have a superior luminous efficacy and emission lifespan than conventional elements. Specifically, provided are: an organic electronic material that is characterized by containing an oligomer or a polymer having a structure that branches into three or more directions and has at least one polymerizable substituent; an ink composition containing said organic electronic material; and an organic thin film prepared using the aforementioned organic electronic material. Further, provided are an organic electronic element and an organic electroluminescent element containing said organic thin film.
1. An organic electroluminescent element formed by laminating at least a substrate, an anode, a hole injection layer, a light emitting layer and a cathode, wherein the hole injection layer is a layer formed from an organic thin film produced using an organic electronic material,
wherein the organic electronic material comprises a polymer or oligomer having a number average molecular weight of 3,000 or more, which (1) has at least one polymerizable substituent and (2) has a structure branching in three or more directions, in which when a chain of said structure branching in three or more directions, having the highest degree of polymerization among the various chains in one molecule of the polymer or oligomer, is designated as the main chain, side chains having an equal degree of polymerization or a lower degree of polymerization are linked to the main chain, and
the polymer or oligomer comprises (a) a compound formed by a reaction including the following Monomer 1, Monomer 2, and Monomer A as reactants, or (b) a compound formed by a reaction including the following Monomer 1, Monomer 3, Monomer 4, and Monomer B as reactants:
2. The organic electroluminescent element according to claim 1 , wherein the number average molecular weight of the polymer or oligomer is from 3,000 to 1,000,000.
3. The organic electroluminescent element according to claim 1 , wherein the polydispersity of the polymer or oligomer is greater than 1.0.
4. The organic electroluminescent element according to claim 1 , further comprising a dopant.
5. The organic electroluminescent element according to claim 1 , further comprising a polymerization initiator.
6. The organic electroluminescent element according to claim 5 , wherein the polymerization initiator is a thermal polymerization initiator.
7. The organic electroluminescent element according to claim 5 , wherein the polymerization initiator is an ionic compound.
8. The organic electroluminescent element according to claim 5 , wherein the polymerization initiator also functions as a dopant.
9. The organic electroluminescent element according to claim 1 , wherein an emission color is white.
10. The organic electroluminescent element according to claim 1 , wherein the substrate is a flexible substrate.
11. The organic electroluminescent element according to claim 1 , wherein the substrate is a resin film.
12. A display element comprising the organic electroluminescent element according to claim 1 .
13. A lighting device comprising the organic electroluminescent element according to claim 1 .
14. A display device comprising the lighting device according to claim 13 , and a liquid crystal element as a display unit.
15. The organic electroluminescent element according to claim 1 , wherein the polymer or oligomer comprises (a) the compound formed by the reaction including the Monomer 1, the Monomer 2, and the Monomer A as reactants at a molar ratio of Monomer 1:Monomer 2:Monomer A=3:4:1, or (b) the compound formed by the reaction including the Monomer 1, the Monomer 3, the Monomer 4, and the Monomer B as reactants at a molar ratio of Monomer 1:Monomer 3:Monomer 4:Monomer B=2:6:1:4.
16. An organic electroluminescent element formed by laminating at least a substrate, an anode, a hole injection layer, a light emitting layer and a cathode, wherein the hole injection layer is a layer formed from an organic thin film produced using an organic electronic material,
wherein the organic electronic material comprises a polymer or oligomer having a number average molecular weight of 3,000 or more, and the polymer or oligomer comprises (a) a compound formed by a reaction including the following Monomer 1, Monomer 2, and Monomer A as reactants, or (b) a compound formed by a reaction including the following Monomer 1, Monomer 3, Monomer 4, and Monomer B as reactants:
17. The organic electroluminescent element according to claim 16 , wherein the polymer or oligomer comprises (a) the compound formed by the reaction including the Monomer 1, the Monomer 2, and the Monomer A as reactants at a molar ratio of Monomer 1:Monomer 2:Monomer A=3:4:1, or (b) the compound formed by the reaction including the Monomer 1, the Monomer 3, the Monomer 4, and the Monomer B as reactants at a molar ratio of Monomer 1:Monomer 3:Monomer 4:Monomer B=2:6:1:4.