Acta Phys. -Chim. Sin. ›› 2017, Vol. 33 ›› Issue (5): 1057-1064.doi: 10.3866/PKU.WHXB201702161

• ARTICLE • Previous Articles     Next Articles

White Organic Light-Emitting Diodes Based on Exciton and Electroplex Dual Emissions

Kang-Ming TAN1,Min-Nan YAN1,Ying-Nan WANG1,Ling-Hai XIE1,Yan QIAN1,*(),Hong-Mei ZHANG1,*(),Wei HUANG1,2,*()   

  1. 1 Key Laboratory for Organic Electronics and Information Displays & Institute of Advanced Materials, Jiangsu National Synergistic Innovation Center for Advanced Materials, Nanjing University of Posts & Telecommunications, Nanjing 210023, P. R. China
    2 Key Laboratory of Flexible Electronics & Institute of Advanced Materials, Jiangsu National Synergistic Innovation Center for Advanced Materials, Nanjing Tech University, Nanjing 211816, P. R. China
  • Received:2016-12-14 Published:2017-04-20
  • Contact: Yan QIAN,Hong-Mei ZHANG,Wei HUANG E-mail:iamyqian@njupt.edu.cn;iamhmzhang@njupt.edu.cn;iamwhuang@njupt.edu.cn
  • Supported by:
    the National Basic Research Program of China (973 Program)(2012CB723402);Jiangsu National Synergistic Innovation Center for Advanced Materials, China(国家级2011协同创新中心);Priority Academic Program Development of Jiangsu Higher Education Institutions (PAPD)(YX03001);China, Synergistic Innovation Center for Organic Electronics and Information Displays, National Natural Science Foundation of China(21373114);China, Synergistic Innovation Center for Organic Electronics and Information Displays, National Natural Science Foundation of China(21573111);China, Synergistic Innovation Center for Organic Electronics and Information Displays, National Natural Science Foundation of China(61674081);China, Synergistic Innovation Center for Organic Electronics and Information Displays, National Natural Science Foundation of China(51333007);six Talents Peak Project of Jiangsu Province, China(XCL-CXTD-009);Qing Lan Project of Jiangsu Province, NUPT 1311 project, China

Abstract:

Two new blue-light-emitting materials based on tetraphenylethylene (TPE), TPE-4Br, and TPE-3Br have been designed and synthesized. They have been used as emitting materials in organic light-emitting diodes (OLEDs) and have been found to form electroplex with an appropriate neighboring hole or electron transporting layer. Using the intrinsic local exciton emission and electroplex emission, desirable white electroluminescence has been obtained. Using TPE-4Br and TPE-3Br in 1, 3-di (9H-carbazol-9-yl) benzene (mCP) matrix as the emitting layer, 4, 4'-(cyclohexane-1, 1-diyl) bis (N, N-di-p-tolylaniline) (TAPC) and 3, 3'-(5'-(3-(pyridin-3-yl) phenyl)-[1, 1':3', 1"-terphenyl]-3, 3"-diyl) dipyridine (TmPyPB) as the hole and electron transporting layers, respectively, Device A and Device B have been fabricated with the corresponding CIE coordinates of (0.32, 0.33) and (0.31, 0.34) at 9 V. Device B showed the maximum luminance of 364.66 cd·m-2 and the maximum current efficiency of 0.79 cd·A-1.

Key words: White organic light-emitting diode, Electroplex, Tetraphenylethene, Solid state emission

MSC2000: 

  • O649