Patent ID: 7935432
Filing Date: 2011-05-03
Classification: H01L,Y10S

Abstract:
1. An organic electroluminescent device having at least one organic compound layer containing a light-emitting layer between an anode and a cathode, wherein the organic compound layer contains a hole-transporting layer, a light-emitting layer and an electron-transporting layer, the light-emitting layer comprises a laminated structure formed by alternately laminating a layer containing at least one kind of fluorescent light-emitting compound emitting a fluorescent light at a time that voltage is applied and another layer containing at least one kind of amplifying agent, and a phosphorescent light-emitting maximum wavelength of the amplifying agent is equal to or less than 500 nm, and light emission at a time that voltage is applied to the device comprises mainly the fluorescent light emitted from the fluorescent light-emitting compound, wherein the laminated structure comprises at least four layers and at least one kind of the amplifying agent is represented by the following formula (1): wherein R wherein a light-emitting maximum wavelength from the fluorescent light-emitting compound is 500 nm or less.