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Performance Enhancement of Lead-Free Tin-Based Perovskite Solar Cells with Reducing Atmosphere-Assisted Dispersible Additive
Open accessAbstract
Sn-based halide perovskite materials have attracted tremendous attention and have been employed successfully in solar cells. However, their high conductivities resulting from the unstable divalent Sn state in the structure cause poor device performance and poor reproducibility. Herein, we used excess tin iodide (SnI 2 ) in Sn-based halide perovskite solar cells (ASnI 3, A = Cs, methylammonium, and formamidinium tin iodide as the representative light absorbers) combined with a reducing atmosphere to stabilize the Sn 2+ state. Excess SnI 2 can disperse uniformly into the perovskite films and functions as a compensator as well as a suppressor of Sn 2+ vacancies, thereby effectively reducing the p-type conductivity. This process significantly improved the solar cell performances of all the ASnI 3 materials on mesoporous TiO 2 . Optimized CsSnI 3 devices achieved a maximum power conversion efficiency of 4.81%, which is the highest among all inorganic Pb-free perovskite solar cells to date.
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Stranks, S. D., Eperon, G. E., Grancini, G., Menelaou, C., Alcocer, M. J. P., Leijtens, T., Herz, L. M., Petrozza, A., & Snaith, H. J. (2013) · Science · doi:10.1126/science.1243982 · Cited by 10,413
Lead halide perovskite nanowire lasers with low lasing thresholds and high quality factors
Zhu, H., Fu, Y., Meng, F., Wu, X., Gong, Z., Ding, Q., Gustafsson, M. V., Trinh, M. T., Jin, S., & Zhu, X.-Y. (2015) · Nature Materials · doi:10.1038/nmat4271 · Cited by 2,836
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Chemical stability and instability of inorganic halide perovskites
Zhou, Y., & Zhao, Y. (2019) · Energy & Environmental Science · doi:10.1039/c8ee03559h · Cited by 784
Chen, M., Ju, M.-G., Garces, H. F., Carl, A. D., Ono, L. K., Hawash, Z., Zhang, Y., Shen, T., Qi, Y., Grimm, R. L., et al. (2019) · Nature Communications · doi:10.1038/s41467-018-07951-y · Cited by 759
Synthetic Approaches for Halide Perovskite Thin Films
Dunlap-Shohl, W. A., Zhou, Y., Padture, N. P., & Mitzi, D. B. (2019) · Chemical Reviews · doi:10.1021/acs.chemrev.8b00318 · Cited by 631
Recent progress of inorganic perovskite solar cells
Tai, Q., Tang, K.-C., & Yan, F. (2019) · Energy & Environmental Science · doi:10.1039/c9ee01479a · Cited by 528
Tin-Based Defects and Passivation Strategies in Tin-Related Perovskite Solar Cells
Li, B., Chang, B., Pan, L., Li, Z., Fu, L., He, Z., & Yin, L. (2020) · ACS Energy Letters · doi:10.1021/acsenergylett.0c01796 · Cited by 258
Metadata
- Authors
- Song, T.-B., Yokoyama, T., Aramaki, S., & Kanatzidis, M. G.
- Venue
- ACS Energy Letters
- Publisher
- American Chemical Society (ACS)
- Published
- 2017-03-24
- Volume
- 2
- Issue
- 4
- Pages
- 897-903
- ISSN
- 2380-8195 (ISSN-L)
- OpenAlex
- W2602614875
- Cited by
- 352
- References
- 2
- FWCI
- 16.11
- Type
- journal article
- Language
- en
- Open access
- green
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- Song, T.-B., Yokoyama, T., Aramaki, S., & Kanatzidis, M. G. (2017). Performance Enhancement of Lead-Free Tin-Based Perovskite Solar Cells with Reducing Atmosphere-Assisted Dispersible Additive. ACS Energy Letters. https://doi.org/10.1021/acsenergylett.7b00171
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