White organic light-emitting diodes based on combined electromer and monomer emission in doubly-doped polymers

doi:10.1088/1674-1056/21/8/088504

Abstract We report on white organic light-emitting diodes (WOLEDs) based on polyvinylcarbazole (PVK) doped with 1,1-bis((di-4-tolylamino)phenyl)cyclohexane (TAPC) and perylene, and investigate the luminescence mechanism of the devices. The chromaticity of light emission can be tuned by adjusting the concentration of the dopants. White light with the Commission Internationale de L'Eclairage (CIE) coordinates of (0.33, 0.34) is achieved by mixing the yellow electromer emission of TAPC and the blue monomer emission of perylene from the device ITO/PVK: TAPC: perylene (100:9:1 in wt.) (100 nm)/tris-(8-hydroxyquinoline aluminum (Alq₃) (10 nm)/Al. The device exhibits a maximal luminance of 3727 cd/m² and a current efficiency of 2 cd/A.

Keywords: white organic light-emitting diodes electromer emission monomer emission Commission Internationale de L'Eclairage (CIE)

Received: 05 March 2012
Revised: 26 April 2012
Accepted manuscript online:

PACS:	85.60.Jb	(Light-emitting devices)
	61.72.up	(Other materials)
	78.60.Fi	(Electroluminescence)
	85.60.Bt	(Optoelectronic device characterization, design, and modeling)

Fund: Project supported by the National Natural Science Foundation of China (Grant Nos. 61177017, 61125505, 60978061, 61077022, 61036007, and 60877005) and the 111 Project (Grant No. B08002).

Corresponding Authors: Lou Zhi-Dong
E-mail: zhdlou@bjtu.edu.cn

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Meng Ling-Chuan (孟令川), Lou Zhi-Dong (娄志东), Yang Sheng-Yi (杨盛谊), Hou Yan-Bing (侯延冰), Teng Feng (滕枫), Liu Xiao-Jun (刘小君), Li Yun-Bai (李云白 ) White organic light-emitting diodes based on combined electromer and monomer emission in doubly-doped polymers 2012 Chin. Phys. B 21 088504

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White organic light-emitting diodes based on combined electromer and monomer emission in doubly-doped polymers

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