Importance of Reducing Vapor Atmosphere in the Fabrication of Tin-Based Perovskite Solar Cells
Abstract
Tin-based halide perovskite materials have been successfully employed in lead-free perovskite solar cells, but the tendency of these materials to form leakage pathways from p-type defect states, mainly Sn4+ and Sn vacancies, causes poor device reproducibility and limits the overall power conversion efficiencies. Here, we present an effective process that involves a reducing vapor atmosphere during the preparation of tin-based halide perovskite solar cells to solve this problem, using MASnI3, CsSnI3 and CsSnBr3 as the representative absorbers. This process enables the fabrication of remarkably improved solar cells with power conversion efficiencies of 3.89%, 1.83% and 3.04% for MASnI3, CsSnI3 and CsSnBr3 respectively. The reducing vapor atmosphere process results in more than 20% reduction of Sn4+/Sn2+ ratios, which leads to greatly suppressed carrier recombination, to a level comparable to their lead-based counterparts. These results mark an important step towards a deeper understanding of the intrinsic tin-based halide perovskite materials, paving the way to the realization of low-cost and lead-free Sn-based halide perovskite solar cells.
- Authors:
-
- Northwestern Univ., Evanston, IL (United States). Dept. of Chemistry
- Northwestern Univ., Evanston, IL (United States). Dept. of Chemistry; Mitsubishi Chemical Group Science and Technology Research Center, Inc. (Japan)
- Mitsubishi Chemical Group Science and Technology Research Center, Inc. (Japan)
- Publication Date:
- Research Org.:
- Energy Frontier Research Centers (EFRC) (United States). Argonne-Northwestern Solar Energy Research Center (ANSER)
- Sponsoring Org.:
- USDOE Office of Science (SC), Basic Energy Sciences (BES)
- OSTI Identifier:
- 1388144
- Grant/Contract Number:
- SC0001059
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Journal of the American Chemical Society
- Additional Journal Information:
- Journal Volume: 139; Journal Issue: 2; Related Information: ANSER partners with Northwestern University (lead); Argonne National Laboratory; University of Chicago; University of Illinois, Urbana-Champaign; Yale University; Journal ID: ISSN 0002-7863
- Publisher:
- American Chemical Society (ACS)
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY; catalysis (homogeneous); catalysis (heterogeneous); solar (photovoltaic); solar (fuels); photosynthesis (natural and artificial); bio-inspired; hydrogen and fuel cells; electrodes - solar; defects; charge transport; spin dynamics; membrane; materials and chemistry by design; optics; synthesis (novel materials); synthesis (self-assembly)
Citation Formats
Song, Tze-Bin, Yokoyama, Takamichi, Stoumpos, Constantinos C., Logsdon, Jenna, Cao, Duyen H., Wasielewski, Michael R., Aramaki, Shinji, and Kanatzidis, Mercouri G. Importance of Reducing Vapor Atmosphere in the Fabrication of Tin-Based Perovskite Solar Cells. United States: N. p., 2016.
Web. doi:10.1021/jacs.6b10734.
Song, Tze-Bin, Yokoyama, Takamichi, Stoumpos, Constantinos C., Logsdon, Jenna, Cao, Duyen H., Wasielewski, Michael R., Aramaki, Shinji, & Kanatzidis, Mercouri G. Importance of Reducing Vapor Atmosphere in the Fabrication of Tin-Based Perovskite Solar Cells. United States. https://doi.org/10.1021/jacs.6b10734
Song, Tze-Bin, Yokoyama, Takamichi, Stoumpos, Constantinos C., Logsdon, Jenna, Cao, Duyen H., Wasielewski, Michael R., Aramaki, Shinji, and Kanatzidis, Mercouri G. Thu .
"Importance of Reducing Vapor Atmosphere in the Fabrication of Tin-Based Perovskite Solar Cells". United States. https://doi.org/10.1021/jacs.6b10734. https://www.osti.gov/servlets/purl/1388144.
@article{osti_1388144,
title = {Importance of Reducing Vapor Atmosphere in the Fabrication of Tin-Based Perovskite Solar Cells},
author = {Song, Tze-Bin and Yokoyama, Takamichi and Stoumpos, Constantinos C. and Logsdon, Jenna and Cao, Duyen H. and Wasielewski, Michael R. and Aramaki, Shinji and Kanatzidis, Mercouri G.},
abstractNote = {Tin-based halide perovskite materials have been successfully employed in lead-free perovskite solar cells, but the tendency of these materials to form leakage pathways from p-type defect states, mainly Sn4+ and Sn vacancies, causes poor device reproducibility and limits the overall power conversion efficiencies. Here, we present an effective process that involves a reducing vapor atmosphere during the preparation of tin-based halide perovskite solar cells to solve this problem, using MASnI3, CsSnI3 and CsSnBr3 as the representative absorbers. This process enables the fabrication of remarkably improved solar cells with power conversion efficiencies of 3.89%, 1.83% and 3.04% for MASnI3, CsSnI3 and CsSnBr3 respectively. The reducing vapor atmosphere process results in more than 20% reduction of Sn4+/Sn2+ ratios, which leads to greatly suppressed carrier recombination, to a level comparable to their lead-based counterparts. These results mark an important step towards a deeper understanding of the intrinsic tin-based halide perovskite materials, paving the way to the realization of low-cost and lead-free Sn-based halide perovskite solar cells.},
doi = {10.1021/jacs.6b10734},
journal = {Journal of the American Chemical Society},
number = 2,
volume = 139,
place = {United States},
year = {Thu Dec 15 00:00:00 EST 2016},
month = {Thu Dec 15 00:00:00 EST 2016}
}
Web of Science
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A Cation-Exchange Approach for the Fabrication of Efficient Methylammonium Tin Iodide Perovskite Solar Cells
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