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High-efficiency inverted tandem polymer solar cells with step-Al-doped MoO3 interconnection layer

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Authors
Liu, Jian
Shao, S.
Fang, G.
Wang, J.
Meng, B.
Xie, Z.
Wang, L.
Date
2014
Type
Journal Article

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Liu, J. and Shao, S. and Fang, G. and Wang, J. and Meng, B. and Xie, Z. and Wang, L. 2014. High-efficiency inverted tandem polymer solar cells with step-Al-doped MoO3 interconnection layer. Solar Energy Materials and Solar Cells. 120 (PART B): pp. 744-750.
Source Title
Solar Energy Materials and Solar Cells
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WASM: Minerals, Energy and Chemical Engineering (WASM-MECE)
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Abstract

A highly transparent and physically robust step-Al-doped MoO3 layer was successfully utilized as the interconnection layer (ICL) to fabricate high-efficiency inverted tandem polymer solar cells (PSCs). The inverted tandem cell constructed by the same PCDTBT:PC70BM active layer showed a power conversion efficiency (PCE) of 6.88% with equivalent external quantum efficiency of nearly 80%, implying a high charge-collection efficiency in tandem structure. Incorporation of two sub-cells with complementary absorption spectra leads to further increase of PCE over 7.31%, which is the best results for tandem PSCs with PEDOT:PSS-free interconnection layer. © 2013 Elsevier B.V.