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Sb2O3 anode buffer induced morphology improvement in small molecule organic solar cells

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7 Author(s)
Zuo, Lijian ; State Key Laboratory of Silicon Materials, MOE Key Laboratory of Macromolecule Synthesis and Functionalization, and Department of Polymer Science and Engineering, Zhejiang University, Hangzhou 310027, People’s Republic of China ; Jiang, Xiaoxia ; Yang, Ligong ; Xu, Mingsheng
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We report that a very thin n-type Sb2O3 anode buffer layer in copper phthalocyanine (CuPc)/fullerene (C60) organic solar cells (OSCs) increases the power conversion efficiency by a factor of ∼34%. The enhancement is mostly attributed to the preferred orientation of CuPc layer and the increased contact area of CuPc/C60 interface, induced by the Sb2O3 layer rather than commonly regarded energy level alignment achieved by other metal oxides such as MoO3. Our study provides an insight to understand effect of the metal oxide buffer layers on the morphological influence in organic solar cells.

Published in:

Applied Physics Letters  (Volume:99 ,  Issue: 18 )

Date of Publication:

Oct 2011

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