Patent ID: 6821648
Filing Date: 2004-11-23
Classification: C08G,C09K,H01L,H05B,Y10S,Y10T

Abstract:
An electroluminescent device comprisingan anode a cathode; at least one electroluminescent organic layer interposed therebetween; and an auxiliary carrier transporting layer between the anode and organic layer, wherein said at least one electroluminescent organic layer comprises a luminescent material that emits light upon application of a voltage between the anode and the cathode; said auxiliary carrier transporting layer is formed from a salt of an electron-accepting dopant and a polyimide precursor and/or polyimide having oligo-aniline units on side chains, and the polyimide precursor and/or polyimide being obtained from a diamine component containing at least 1 mol % of an oligo-aniline unit-bearing diaminobenzene derivative represented by the following general formula (1) and a tetracarboxylic dianhydride or derivative thereof, wherein R1 to R9 are independently selected from the group consisting of hydrogen, an alkyl group, an alkoxy group, a sulfonate group, and a substituted or unsubstituted cyclohexyl, biphenyl, bicyclohexyl or phenylcyclohexyl group, n is a positive number of at least 1, A is a single bond or a divalent organic group selected from the group consisting of â€”Oâ€”, â€”COOâ€”, â€”CONHâ€” and â€”NHâ€”, and R0 is a trivalent organic group containing an aromatic ring.