Patent ID: 7737624
Filing Date: 2010-06-15
Classification: H01L,Y10S

Abstract:
1. An organic electroluminescent device comprising a substrate and at least one organic layer containing a light-emitting layer between a pair of electrodes, wherein the light-emitting layer contains at least one host material, wherein the organic electroluminescent device contains a compound emitting fluorescence at a time that voltage is applied, and a light emission at the time that voltage is applied is mainly derived from a light emission from the fluorescent compound, and an external quantum efficiency of the device is 6% to 15.8%; wherein the compound emitting fluorescence is represented by one of the following formulae (1)-(5): wherein R 101 , R 102 , R 103 , R 105 , R 106 , R 107 , R 108 , R 110 , R 201 , R 202 , R 203 , R 204 , R 205 , R 206 , R 207 , R 208 , R 301 , R 302 , R 303 , R 304 , R 305 , R 306 , R 307 , R 308 , R 309 , R 310 , R 311 , R 312 , R 401 , R 402 , R 403 , R 404 , R 405 , R 406 , R 407 , R 408 , R 409 , R 410 , R 411 , R 412 , R 501 , R 502 , R 503 , R 504 , R 505 , R 506 , R 507 , R 508 , R 509 , and R 510 each individually represents a hydrogen atom, an alkyl group, an alkenyl group, an alkynyl group, an aryl group, an amino group, an alkoxy group, an aryloxy group, a heterocyclic oxy group, an acyl group, an alkoxy carbonyl group, an aryloxycarbonyl group, an acyloxy group, an acylamino group, an alkoxycarbonylamino group, an aryloxycarbonylamino group, a sulfonylamino group, a sulfamoyl group, a carbamoyl group, an alkylthio group, an arylthio group, a heterocyclic thio group, a sulfonyl group, a sulfinyl group, a ureido group, a phosphoric acid amido group, a hydroxyl group, a mercapto group, a halogen atom, a cyano group, a sulfo group, a carboxyl group, a nitro group, a hydroxamic acid group, a sulfino group, a hydrazino group, an imino group, a heterocyclic group, a silyl group, or a silyloxy group, wherein R 104 and R 109 each individually represents a hydrogen atom, an aryl group, a heteroaryl group, or an amino group.