期刊
OPTICS EXPRESS
卷 21, 期 9, 页码 11078-11085出版社
OPTICAL SOC AMER
DOI: 10.1364/OE.21.011078
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资金
- National Basic Research Program of China (973 program) [2009CB623604, 2013CB834805]
- National Natural Science Foundation of China [21161160442, 61036007]
- Science Fund for Creative Research Groups of NSFC [20921061]
- Foundation of Jilin Research Council [2012ZDGG001, 201105028]
By doping blue, green and red dyes into a bipolar host system, a simple single-EML white organic light-emitting diode (WOLED) with efficiency and color-stability trade-off was achieved by solution process. The resulting WOLED shows high efficiency (i.e., 36.5 cd/A and 15.7% at 1141 cd/m(2)), reduced efficiency roll-off (i.e., critical current density j(c) is as high as 140 mA/cm(2)) and, especially, extremely stable electroluminescence spectra with a slight CIE coordinate variation of (0.404 +/- 0.004, 0.436 +/- 0.001). The superior performance of the WOLED is attributed to the effective suppression of exciton quenching and charge trapping in the bipolar EML. (C) 2013 Optical Society of America
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