Oxidation of silver electrodes induces transition from conventional to inverted photovoltaic characteristics in polymer solar cells

被引：66

作者：

Kim, Jong Bok ^{[1
]}

Kim, Chang Su ^{[1
]}

Kim, Youn Sang ^{[2
]}

Loo, Yueh-Lin ^{[1
]}

机构：

[1] Princeton Univ, Dept Chem Engn, Princeton, NJ 08544 USA

[2] Seoul Natl Univ, Dept Nano Sci & Technol, Grad Sch Convergence Sci & Technol, Seoul 151742, South Korea

来源：

APPLIED PHYSICS LETTERS | 2009年 / 95卷 / 18期

基金：

新加坡国家研究基金会;

关键词：

annealing; electrodes; grain size; oxidation; photovoltaic effects; silver; solar cells; work function;

D O I：

10.1063/1.3257361

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Oxidation of silver top electrodes in polymer solar cells induces the devices to exhibit a transition from conventional to inverted photovoltaic characteristics. As silver oxidizes, its work function increases from 4.3 to 5.0 eV. The silver top electrode thus reverts from collecting electrons to collecting holes during device operation. We have quantified the extent of this transformation and find it to be correlated with the rate of silver oxidation, which we can influence by altering the annealing sequence of the polymer photoactive layer, ultimately varying the grain size of silver in the top electrode.

引用

页数：3

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