Patent ID: 6603140
Filing Date: 2003-08-05
Classification: C09K,H01L,H05B

Abstract:
An organic electroluminescent device comprising a light emitting layer in the form of a mix layer containing a hole injecting and transporting compound and an electron injecting and transporting compound, the mix layer being further doped with a coumarin derivative of the following formula (I), a quinacridone compound of the following formula (III) or a styryl amine compound of the following formula (IV) as a dopant, wherein each of R1, R2, and R3, which may be identical or different, is a hydrogen atom, cyano, carboxyl, alkyl, aryl, acyl, ester or heterocyclic group, or R1 to R3, taken together, may form a ring; each of R4 and R7 is a hydrogen atom, alkyl or aryl group; each of R5 and R6 is an alkyl or aryl group; or R4 and R5, R5 and R6, and R6 and R7, taken together, may form a ring, â€ƒwherein each of R21 and R22, which may be identical or different, is a hydrogen atom, alkyl or aryl group; each of R23 and R24 is an alkyl or aryl group; each of t and u is 0 or an integer of 1 to 4; or adjacent R23 groups or R24 groups, taken together, may form a ring when t or u is at least 2, â€ƒwherein R31 is a hydrogen atom or aryl group; each of R32 and R33, which may be identical or different, is a hydrogen atom, aryl or alkenyl group; R34 is an arylamino or arylaminoaryl group; and v is 0 or an integer of 1 to 5.