Low-Temperature Solution-Processed Tin Oxide as an Alternative Electron Transporting Layer for Efficient Perovskite Solar Cells
- 22 May 2015
- journal article
- research article
- Published by American Chemical Society (ACS) in Journal of the American Chemical Society
- Vol. 137 (21), 6730-6733
- https://doi.org/10.1021/jacs.5b01994
Abstract
Lead halide perovskite solar cells with the high efficiencies typically use high-temperature processed TiO2 as the electron transporting layers (ETLs). Here, we demonstrate that low-temperature solution-processed nanocrystalline SnO2 can be an excellent alternative ETL material for efficient perovskite solar cells. Our best-performing planar cell using such a SnO2 ETL has achieved an average efficiency of 16.02%, obtained from efficiencies measured from both reverse and forward voltage scans. The outstanding performance of SnO2 ETLs is attributed to the excellent properties of nanocrystalline SnO2 films, such as good antireflection, suitable band edge positions, and high electron mobility. The simple low-temperature process is compatible with the roll-to-roll manufacturing of low-cost perovskite solar cells on flexible substrates.Keywords
Funding Information
- Ministry of Education of the People's Republic of China (2014202020207)
- Ministry of Science and Technology of the People's Republic of China (2011CB933300, 2015AA050601)
- Ohio Board of Regents
- Ohio Department of Development
- U.S. Department of Energy (DE-FOA-0000990)
- National Natural Science Foundation of China (61376013, 91433203, J1210061)
- Wuhan Science and Technology Bureau (2013010501010141)
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