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Chin. Phys. B, 2014, Vol. 23(7): 077802    DOI: 10.1088/1674-1056/23/7/077802
CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES Prev   Next  

Pure blue and white light electroluminescence in a multilayer organic light-emitting diode using a new blue emitter

Wei Na (魏娜)a b, Guo Kun-Ping (郭坤平)a b, Zhou Peng-Chao (周朋超)a b, Yu Jian-Ning (于建宁)b, Wei Bin (魏斌)b, Zhang Jian-Hua (张建华)b
a School of Materials Science and Engineering, Shanghai University, Shanghai 200072, China;
b Key Laboratory of Advanced Display and System Applications of Ministry of Education, Shanghai University, Shanghai 200072, China
Abstract  We characterized the 6,12-bis{[N-(3,4-dimethylphenyl)-N-(2,4,5-trimethylphenyl)]}amino chrysene (BmPAC), which has been proven to be a blue fluorescent emission with high EL efficiency. The blue fluorescent device exhibits good performance with an external quantum efficiency of 5.8% and current efficiency of 8.9 cd/A, respectively. Using BmPAC, we also demonstrate a hybrid phosphorescence/fluorescence white organic light-emitting device (WOLED) with high efficiency of 36.3 cd/A. In order to improve the relative intensity of blue light, we plus a blue light-emitting layer (BEML) in front of the orange light emitting layer (YEML) to take advantage of the excess singlet excitons. With the new emitting layer of BEML/YEML/BEML, we demonstrate the fluorescence/phosphorescence/fluorescence WOLED exhibits good performance with a current efficiency of 47 cd/A and an enhanced relative intensity of blue light.
Keywords:  BmPAC      high efficiency      blue organic light emitting diodes      white organic light-emitting diodes  
Received:  29 October 2013      Revised:  10 January 2014      Accepted manuscript online: 
PACS:  78.60.Fi (Electroluminescence)  
  72.80.Le (Polymers; organic compounds (including organic semiconductors))  
Fund: Project supported by the National Natural Science Foundation of China (Grant Nos. 61136003 and 61275041) and the Project of Science and Technology Commission of Shanghai Municipality, China (Grant No. 14XD1401800).
Corresponding Authors:  Zhang Jian-Hua     E-mail:  jhzhang@staff.shu.edu.cn
About author:  78.60.Fi; 72.80.Le

Cite this article: 

Wei Na (魏娜), Guo Kun-Ping (郭坤平), Zhou Peng-Chao (周朋超), Yu Jian-Ning (于建宁), Wei Bin (魏斌), Zhang Jian-Hua (张建华) Pure blue and white light electroluminescence in a multilayer organic light-emitting diode using a new blue emitter 2014 Chin. Phys. B 23 077802

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