JP2007194241A5 - - Google Patents

Claims (4)

An element in which at least a light emitting layer exists between an anode and a cathode and emits light by electric energy, the light emitting layer has a host material and a dopant material, and the host material has a carbazole skeleton represented by the general formula (1) A light-emitting element comprising a compound having a dopant material as a fluorescent material.

^{(R 1, R 2, R} 4 ~R 8 each is hydrogen, an alkyl group, an alkoxy group, the aryl group, heterocyclic group, amino group, Oh Rui ring structure between an adjacent substituent selected from among. R ³ is a linking group Y, Y is a single bond, a alkylene chain, the aryl chain, amino chain .R ⁹ to or selected from a combination alone or from any of the heterocyclic chains, Selected from hydrogen, alkyl group and aryl group, n is a natural number of 2 or more. ) The light emitting device according to claim 1, wherein the compound having a carbazole skeleton is represented by the following general formula (2).

(R ¹⁰ to R ²³ are each hydrogen, an alkyl group, a cycloalkyl group, an alkoxy group, the aryl group, heterocyclic group, amino group, Oh Rui in the ring structure between the substituents adjacent R ²⁴ and R ²⁵ are each selected from hydrogen, an alkyl group, and an aryl group.) Compound or derivative thereof in which the fluorescent material has an aryl ring, compound or derivative thereof having a heteroaryl ring, distyrylbenzene derivative, aminostyryl derivative, aromatic acetylene derivative, tetraphenylbutadiene derivative, stilbene derivative, aldazine derivative, pyromethene derivative, The light emitting device according to claim 1 or 2, which is a diketopyrrolo [3,4-c] pyrrole derivative, a coumarin derivative, an azole derivative or a metal complex thereof, or an aromatic amine derivative. There is at least an electron transport layer between the light emitting layer and the cathode, and the electron transport layer contains electron-accepting nitrogen, and is further composed of an element selected from carbon, hydrogen, nitrogen, oxygen, silicon, and phosphorus. The light emitting device according to any one of claims 1 to 3, comprising a compound having a heteroaryl ring structure.