https://doi.org/10.1140/epjp/s13360-022-03428-6
Regular Article
Improving the performance of Sb2Se3 thin-film solar cells using pyrolytic ammonium metatungstate back contact layer
1
School of Materials Science and Engineering, Chongqing University of Technology, 402160, Chongqing, People’s Republic of China
2
Research Institute for New Materials and Technology, Chongqing University of Arts and Sciences, 402160, Chongqing, People’s Republic of China
Received:
5
June
2022
Accepted:
24
October
2022
Published online:
2
November
2022
Back surface recombination could have some adverse effects on superstrate antimony selenide (Sb2Se3) solar cells. Anode interface modification, such as inserting a buffer layer with appropriate energy-level matching, is necessary. Here, a novel interfacial material, pyrolytic ammonium metatungstate (PAMT), prepared by spray pyrolysis deposition, was introduced to modify the back contract of antimony selenide solar cells. Morpho-structural and thermal analysis showed that this material is different from crystalline molybdenum oxide powder. Monology characterization showed that PAMT preferentially fills the space of the Sb2Se3 grain boundary. The J–V test showed that this layer improved the interfacial contract between the absorber and the back electrode. The PAMT layer showed suitable energy matching with Sb2Se3, providing an effective channel for hole carriers transport from the absorber to the anode, and largely reducing back contact surface recombination. As a result, the PAMT-modified Sb2Se3 device exhibited a much higher photovoltaic performance, significantly improving the efficiency from 5.27% to 6.11%.
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© The Author(s), under exclusive licence to Società Italiana di Fisica and Springer-Verlag GmbH Germany, part of Springer Nature 2022. Springer Nature or its licensor (e.g. a society or other partner) holds exclusive rights to this article under a publishing agreement with the author(s) or other rightsholder(s); author self-archiving of the accepted manuscript version of this article is solely governed by the terms of such publishing agreement and applicable law.
