Pseudo-halide anion engineering for efficient quasi-2D Ruddlesden-Popper tin perovskite solar cells
Abstract
Quasi-two-dimensional (2D) organic-inorganic hybrid tin perovskites have emerged as promising alternatives to lead-based perovskites in thin-film photovoltaics because of their reduced toxicity and improved stability. However, the undesired small n-value 2D phases and disordered crystal orientation enormously restrict the efficiency of quasi-2D tin perovskite solar cells (PSCs) due to uncontrollable nucleation and crystal growth processes. Here, we propose a mixed pseudo-halide anion engineering approach by using acetate (Ac-) and tetrafluoroborate (BF4-) anions to make quasi-2D Ruddlesden-Popper perovskites with a target formula of PEA2FA4Sn5I16. We find that the mixed Ac- and BF4- anions can not only promote homogeneously distributed PEA+ cations in the precursor by effectively breaking the PEA+···PEA+ stacking but also retard the crystallization process by coordinating with unbonded SnI2, thereby, significantly reducing small n-value 2D phases, improving the crystal orientation, and suppressing the Sn2+ oxidation. The resulting PSC exhibits up to 9% power conversion efficiency and 400 h stability.
- Authors:
-
[2];
[1]
- Cornell University, Ithaca, NY (United States)
- Brookhaven National Laboratory (BNL), Upton, NY (United States). Center for Functional Nanomaterials (CFN)
- Publication Date:
- Research Org.:
- Brookhaven National Lab. (BNL), Upton, NY (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), Basic Energy Sciences (BES); National Science Foundation (NSF)
- OSTI Identifier:
- 1922715
- Report Number(s):
- BNL-223927-2023-JAAM
Journal ID: ISSN 2666-3864
- Grant/Contract Number:
- SC0012704; ECCS-2054942; EPM-2114350; DMR-1719875
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Cell Reports Physical Science
- Additional Journal Information:
- Journal Volume: 3; Journal Issue: 10; Journal ID: ISSN 2666-3864
- Publisher:
- Elsevier
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 36 MATERIALS SCIENCE; Ruddlesden-Popper phase perovskite; tin perovskite solar cell; pseudo-halide anion; crystal growth; charge transport
Citation Formats
Li, Hao, Xu, Yuanze, Ramakrishnan, Shripathi, Zhang, Yugang, Cotlet, Mircea, Xu, Tony Lou, and Yu, Qiuming. Pseudo-halide anion engineering for efficient quasi-2D Ruddlesden-Popper tin perovskite solar cells. United States: N. p., 2022.
Web. doi:10.1016/j.xcrp.2022.101060.
Li, Hao, Xu, Yuanze, Ramakrishnan, Shripathi, Zhang, Yugang, Cotlet, Mircea, Xu, Tony Lou, & Yu, Qiuming. Pseudo-halide anion engineering for efficient quasi-2D Ruddlesden-Popper tin perovskite solar cells. United States. https://doi.org/10.1016/j.xcrp.2022.101060
Li, Hao, Xu, Yuanze, Ramakrishnan, Shripathi, Zhang, Yugang, Cotlet, Mircea, Xu, Tony Lou, and Yu, Qiuming. Tue .
"Pseudo-halide anion engineering for efficient quasi-2D Ruddlesden-Popper tin perovskite solar cells". United States. https://doi.org/10.1016/j.xcrp.2022.101060. https://www.osti.gov/servlets/purl/1922715.
@article{osti_1922715,
title = {Pseudo-halide anion engineering for efficient quasi-2D Ruddlesden-Popper tin perovskite solar cells},
author = {Li, Hao and Xu, Yuanze and Ramakrishnan, Shripathi and Zhang, Yugang and Cotlet, Mircea and Xu, Tony Lou and Yu, Qiuming},
abstractNote = {Quasi-two-dimensional (2D) organic-inorganic hybrid tin perovskites have emerged as promising alternatives to lead-based perovskites in thin-film photovoltaics because of their reduced toxicity and improved stability. However, the undesired small n-value 2D phases and disordered crystal orientation enormously restrict the efficiency of quasi-2D tin perovskite solar cells (PSCs) due to uncontrollable nucleation and crystal growth processes. Here, we propose a mixed pseudo-halide anion engineering approach by using acetate (Ac-) and tetrafluoroborate (BF4-) anions to make quasi-2D Ruddlesden-Popper perovskites with a target formula of PEA2FA4Sn5I16. We find that the mixed Ac- and BF4- anions can not only promote homogeneously distributed PEA+ cations in the precursor by effectively breaking the PEA+···PEA+ stacking but also retard the crystallization process by coordinating with unbonded SnI2, thereby, significantly reducing small n-value 2D phases, improving the crystal orientation, and suppressing the Sn2+ oxidation. The resulting PSC exhibits up to 9% power conversion efficiency and 400 h stability.},
doi = {10.1016/j.xcrp.2022.101060},
journal = {Cell Reports Physical Science},
number = 10,
volume = 3,
place = {United States},
year = {Tue Sep 20 00:00:00 EDT 2022},
month = {Tue Sep 20 00:00:00 EDT 2022}
}
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