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Open Access Highly Accessed Nano Express

Ultraviolet-ozone-treated PEDOT:PSS as anode buffer layer for organic solar cells

Zisheng Su, Lidan Wang, Yantao Li, Haifeng Zhao, Bei Chu* and Wenlian Li

Author Affiliations

State Key Laboratory of Luminescence and Applications, Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun, 130033, People’s Republic of China

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Nanoscale Research Letters 2012, 7:465  doi:10.1186/1556-276X-7-465

Published: 17 August 2012

Abstract

Ultraviolet-ozone-treated poly(3,4-ethylenedioxythiophene):poly(styrene sulfonate) (PEDOT:PSS)was used as the anode buffer layer in copper phthalocyanine (CuPc)/fullerene-based solar cells. The power conversion efficiency of the cells with appropriated UV-ozone treatment was found to increase about 20% compared to the reference cell. The improved performance is attributed to the increased work function of the PEDOT:PSS layer, which improves the contact condition between PEDOT:PSS and CuPc, hence increasing the extraction efficiency of the photogenerated holes and decreasing the recombination probability of holes and electrons in the active organic layers.

Keywords:
Organic solar cell; PEDOT:PSS; UV-ozone