Citation: TAN Kang-Ming, YAN Min-Nan, WANG Ying-Nan, XIE Ling-Hai, QIAN Yan, ZHANG Hong-Mei, HUANG Wei. White Organic Light-Emitting Diodes Based on Exciton and Electroplex Dual Emissions[J]. Acta Physico-Chimica Sinica, ;2017, 33(5): 1057-1064. doi: 10.3866/PKU.WHXB201702161 shu

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

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 Date: 14 December 2016
Revised Date: 16 February 2017

Fund Project: The project was supported by the National Basic Research Program of China (973 Program) (2012CB723402), Jiangsu National Synergistic Innovation Center for Advanced Materials, China (SICAM), 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, 21573111, 61674081, 51333007), six Talents Peak Project of Jiangsu Province, China (XCL-CXTD-009), Qing Lan Project of Jiangsu Province, NUPT 1311 project, China.

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.
- White organic light-emitting diode,
- Electroplex,
- Tetraphenylethene,
- Solid state emission
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沈阳化工大学材料科学与工程学院沈阳 110142