Poor photo-stability of the organic/LiF/Al contact in organic optoelectronic devices

被引：15
作者：
Wang, Qi [1 ]
Aziz, Hany [1 ]
机构：
[1] Univ Waterloo, Dept Elect & Comp Engn, Waterloo, ON N2L 3G1, Canada
来源：
ORGANIC ELECTRONICS | 2011年 / 12卷 / 09期
关键词：
Photo-stability; Organic/LiF/Al contact; Photochemical reaction; Diffusion; MECHANISM;
D O I：
10.1016/j.orgel.2011.06.003
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
We study the photo-stability of the organic/LiF/Al contacts widely used in organic optoelectronic and photovoltaic devices. Exposing organic/LiF/Al to illumination is found to lead to a decrease in fluorescence (FL) yield of the organic layer. The decrease in FL is found to be due to the diffusion of certain positively charged species, possibly resulting from photochemical interactions with the LiF layer. Evidence of the correlation between the density of the excited states in the organic material and the rate of photo-degradation of the organic/LiF/Al contact is also reported. The results reveal that these widely used contacts suffer poor photo-stability. (C) 2011 Elsevier B.V. All rights reserved.
引用
收藏
页码：1571 / 1575
页数：5
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