Improved performance of organic light-emitting diodes with dual electron transporting layers

doi:10.1088/1674-1056/21/6/067202

Abstract In this study the performance of organic light-emitting diodes (OLEDs) are enhanced significantly, which is based on dual electron transporting layers (Bphen/CuPc). By adjusting the thicknesses of Bphen and CuPc, the maximal luminescence, the maximal current efficiency, and the maximal power efficiency of the device reach 17570 cd/m² at 11 V, and 5.39 cd/A and 3.39 lm/W at 3.37 mA/cm² respectively, which are enhanced approximately by 33.4%, 39.3%, and 68.9%, respectively, compared with those of the device using Bphen only for an electron transporting layer. These results may provide some valuable references for improving the electron injection and the transportation of OLED.

Keywords: organic light-emitting diodes dual electron transporting layers CuPc

Received: 11 November 2011
Revised: 05 December 2011
Accepted manuscript online:

PACS:	72.80.Le	(Polymers; organic compounds (including organic semiconductors))
	78.60.Fi	(Electroluminescence)

Fund: Project supported by the National Natural Science Foundation of China (Grant Nos. 60906022 and 60876046) and the Tianjin Natural Science Foundation of China (Grant No. 10JCYBJC01100).

Corresponding Authors: Hua Yu-Lin
E-mail: yulinhua@tjut.edu.cn

Cite this article:

Jiao Zhi-Qiang(焦志强), Wu Xiao-Ming(吴晓明), Hua Yu-Lin(华玉林), Mu Xue(穆雪), Bi Wen-Tao(毕文涛), Bai Juan-Juan(白娟娟), and Yin Shou-Gen(印寿根) Improved performance of organic light-emitting diodes with dual electron transporting layers 2012 Chin. Phys. B 21 067202

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