Top-Emission Ultraviolet-Light-Emitting Diodes Containing Solution-Processed ZnO Nanocrystals

被引：30
|
作者：
Toyama, Toshihiko [1 ]
Kawasaki, Hayato [1 ]
Itatani, Kazuki [1 ]
Okamoto, Hiroaki [1 ]
机构：
[1] Osaka Univ, Dept Syst Innovat, Grad Sch Engn Sci, Osaka 5608531, Japan
来源：
APPLIED PHYSICS EXPRESS | 2011年 / 4卷 / 06期
关键词：
FILMS;
D O I：
10.1143/APEX.4.065005
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
Top-emission light-emitting diodes containing nanoparticles (NanoLEDs) were prepared for flexible electronics applications. Transmission electron microscopy images revealed that solution-processed ZnO nanocrystals (NCs) embedded in a printed emission layer were nearly monodisperse with a crystal size of about 10 nm. To improve the UV electroluminescent emission of ZnO excitons and suppress visible emission from surface defects of the NCs, the low-power deposition of indium tin oxide (ITO) top electrodes was examined together with the deposition of a MoO3 layer before ITO. Finally, conversion from UV to green light via a phosphor is demonstrated, revealing the color tunability of the NanoLEDs. (C) 2011 The Japan Society of Applied Physics
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