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Stability Improvement of Polymer Based Solar Cells by Thermally Evaporated Cr2O3 Interfacial Layer

Published online by Cambridge University Press:  17 June 2011

Mingdong Wang
Affiliation:
Department of Electronic Engineering, and Materials Science and Technology Research Center, The Chinese University of Hong Kong, Hong Kong
Fangyan Xie
Affiliation:
Instrumental Analysis & Research Center, Sun Yat-Sen (Zhongshan) University, Guangzhou, P. R. China
Shizhao Zheng
Affiliation:
Department of Physics, The Chinese University of Hong Kong, Hong Kong, China
Jianbin. Xu*
Affiliation:
Department of Electronic Engineering, and Materials Science and Technology Research Center, The Chinese University of Hong Kong, Hong Kong
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Abstract

We report on Cr2O3 layer by thermal evaporation of Cr2O3 powder as cathode interfacial layer to improve the stability in air for the bulk heterojunction solar cells of poly(3-hexylthiophene) (P3HT) and [6,6]-phenyl C61 butyric acid methyl ester (PCBM). Devices with Cr2O3 interfacial layers show higher power conversion efficiency (PCE) and stability than those without interfacial layer. Devices with Cr2O3 show improved stability approximately 100 times than that of devices without interfacial layer or with LiF interfacial layer.

Type
Research Article
Copyright
Copyright © Materials Research Society 2011

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References

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