Patent ID: 8940408
Filing Date: 2015-01-27
Classification: H01L

Abstract:
1. A white organic light-emitting device, comprising: an anode; a hole transport layer formed on the anode; a first light-emitting layer formed on the hole transport layer, the first light-emitting layer comprising a first host material, a first transition metal organic complex and a carrier transport material; a second light-emitting layer formed on the first light-emitting layer, so as to allow the first light-emitting layer to be disposed between the hole transport layer and the second light-emitting layer, and the second light-emitting layer comprising a second transition metal organic complex; a third light-emitting layer formed on the second light-emitting layer, so as to allow the second light-emitting layer to be disposed between the first light-emitting layer and the third light-emitting layer, the third light-emitting layer comprising a third host material, the first transition metal organic complex and the carrier transport material; an electron transport layer formed on the third light-emitting layer, so as to allow the third light-emitting layer to be disposed between the second light-emitting layer and the electron transport layer; and a cathode formed on an outer surface of the electron transport layer, wherein the emission wavelength of the second light-emitting layer is longer than that of the first light-emitting layer and third light-emitting layer, and the first host material is different from the third host material, wherein the carrier transport material is one selected from one represented by formulae (I) and (II): wherein Ar1, Ar2 and Ar3 are independently selected from C 6 -C 10 aryl group or C 6 -C 10 aryl group substituted by 1 to 3 substituents, wherein the substituents are independently selected from C 1 -C 6 alkyl group, C 1 -C 6 alkoxy group, C 1 -C 6 alkylamino group, N-carbazolyl group or 9-phenylfluorene-9-yl; and L is independenty selected from a single covalent bond, C