Transparent organic light-emitting diodes consisting of a metal oxide multilayer cathode

被引：82

作者：

Ryu, Seung Yoon ^{[1
,2
]}

Noh, Joo Hyon ^{[1
]}

Hwang, Byoung Har ^{[1
]}

Kim, Chang Su ^{[1
]}

Jo, Sung Jin ^{[1
]}

Kim, Jong Tae ^{[1
]}

Hwang, Hyeon Seok ^{[1
]}

Baik, Hong Koo ^{[1
]}

Jeong, Hee Seong ^{[2
]}

Lee, Chang Ho ^{[2
]}

Song, Seung Yong ^{[2
]}

Choi, Seung Ho ^{[2
]}

Park, Si Young ^{[2
]}

机构：

[1] Yonsei Univ, Dept Mat Sci & Engn, Seoul 120749, South Korea

[2] Samsung SDI Co Ltd, AMOLED Business Team, Yongin 449577, Gyeonggi Do, South Korea

来源：

APPLIED PHYSICS LETTERS | 2008年 / 92卷 / 02期

关键词：

D O I：

10.1063/1.2835044

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

The authors have developed a semitransparent, multilayered cathode of indium tin oxide (ITO)/Ag/tungsten oxide (WO3) for transparent organic light-emitting diodes. The device showed a weak negative differential resistance (NDR), until the operating voltage of 8 V was reached. NDR was due to the resonant tunneling by both the quantum barrier and quantum well. The silver oxide (Ag2O) on the Ag metal was confirmed by x-ray photoelectron spectroscopy, and the energy levels of Ag2O were quantized due to the quantum size effect and this produced the resonant tunneling channels. The device using ITO/Ag/WO3 with a LiF/Al bilayer was superior to those devices which only used ITO or WO3, mainly because the out coupling was enhanced by employing a WO3 material, which is much more transparent than ITO. (c) 2008 American Institute of Physics.

引用

页数：3

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