High efficiency fluorescent white organic light-emitting diodes with red,green and blue separately monochromatic emission layers |
| |
Authors: | Zhiqiang Zhang Qi Wang Yanfeng Dai Yipeng Liu Lixiang Wang Dongge Ma |
| |
Affiliation: | State Key Laboratory of Polymer Physics and Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Graduate School of Chinese Academy of Sciences, Changchun 130022, PR China |
| |
Abstract: | Highly efficient fluorescent white organic light-emitting diodes (WOLEDs) have been fabricated by using three red, green and blue, separately monochromatic emission layers. The red and blue emissive layers are based on 4-(dicyanomethylene)-2-tert-butyl-6-(1,1,7,7-tetramethyljulolidin-4-yl-vinyl)-4H-pyran (DCJTB) doped N,N′-di(naphthalene-1-yl)-N,N′-diphenyl-benzidine (NPB) and p-bis(p-N,N-diphenyl-amino-styryl) benzene (DSA-ph) doped 2-methyl-9,10-di(2-naphthyl) anthracene (MADN), respectively; and the green emissive layer is based on tris(8-hydroxyquionline)aluminum(Alq3) doped with 10-(2-benzothiazolyl)-2,3,6,7-tetrahydro-1,1,7,7-tetramethyl-1H,5H,1H-(1)-benzopyropyrano(6,7-8-i,j)quinolizin-1]-one (C545T), which is sandwiched between the red and the blue emissive layers. It can be seen that the devices show stable white emission with Commission International de L’Eclairage coordinates of (0.41, 0.41) and color rendering index (CRI) of 84 in a wide range of bias voltages. The maximum power efficiency, current efficiency and quantum efficiency reach 15.9 lm/W, 20.8 cd/A and 8.4%, respectively. The power efficiency at brightness of 500 cd/m2 still arrives at 7.9 lm/W, and the half-lifetime under the initial luminance of 500 cd/m2 is over 3500 h. |
| |
Keywords: | |
本文献已被 ScienceDirect 等数据库收录! |
|