Patent ID: 8518558
Filing Date: 2013-08-27
Classification: H01L

Abstract:
1. An organic electroluminescent element comprising a substrate, an anode, a cathode, and three light-emitting layers being sandwiched between the anode and the cathode, the light-emitting layers being operable for emitting white light, wherein the three light-emitting layers in their entirety consist of four kinds of light-emitting materials and optionally at least one host material, said four kinds of light-emitting materials are as follows: a blue light-emitting material having an emission maximum wavelength (λ max) of 430 to 480 nm, a green light-emitting material having an emission maximum wavelength (λ max) of 510 to 560 nm, a yellow-red light-emitting material having an emission maximum wavelength (λ max) of 570 to 610 nm, and a red light-emitting material having an emission maximum wavelength (λ max) of 610 to 650 nm, wherein the green light-emitting material, the yellow-red light-emitting material and the red light-emitting material each is a phosphorescent light-emitting material, and the blue light-emitting material is a phosphorescent light-emitting compound represented by the following Formula (1): wherein R the green light-emitting material and the red light-emitting material are simultaneously incorporated in a light-emitting layer located on the anode side of a blue light-emitting layer; and the green light-emitting material and the yellow-red light-emitting material are simultaneously incorporated in a light-emitting layer located on the cathode side of the blue light-emitting layer.