Patent ID: 6846580

Claim:
An organic light-emitting device comprising: a lower electrode; a luminous layer formed on the lower electrode and made of polymer indicated by (1) where Ar 1 denotes a first arylene group, Ar 2 denotes a second arylene group, R 1 denotes a first substituent, R 2 denotes a second substituent, R 3 denotes a third substituent, R 4 denotes a fourth substituent, and n denotes a copolymerization ratio; and the first arylene group is a paraphenylene group and the R 1 the R 2 and Ar 1 consititute a para-product, and the second arylene group is a metaphenylene group and the R 3 , the R 4 and the Ar 2 constitute a meta-product; and an upper electrode formed on the luminous layer.