Patent ID: 8212472
Filing Date: 2012-07-03
Classification: C09K,H01L,H05B,Y10S

Abstract:
1. An organic electric field light-emitting element, comprising: an anode; a cathode; and a light-emitting layer provided between the anode and the cathode, wherein the light-emitting layer contains two or more luminescent materials each giving a different emission peak, and a concentration ratio [(B/A)×100] in the light-emitting layer gradually increases along with the direction from an anode side of the light-emitting layer to a cathode side of the light-emitting layer, where the concentration ratio [(B/A)×100] is a concentration ratio of the luminescent materials, and A denotes a concentration of the luminescent material having the emission peak at the shortest wavelength side compared to the emission peaks of other luminescent materials, and B denote a concentration of the luminescent material having the emission peak at the longest wavelength side compared to the emission peaks of other luminescent materials, and wherein the light-emitting layer satisfies the relationship of: [(B/A)×100]≦10%.