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Stability of the Halide Double Perovskite Cs(2)AgInBr(6)
[Image: see text] Cs(2)AgInBr(6) is among the lead-free halide perovskites of interest, predicted by first-principles calculations to be stable with a direct band gap, but there has been only one report of its synthesis. Herein we report the formation of Cs(2)AgInBr(6) thin films through thermal eva...
Autores principales: | , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
American Chemical Society
2023
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Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10068733/ https://www.ncbi.nlm.nih.gov/pubmed/36943190 http://dx.doi.org/10.1021/acs.jpclett.3c00303 |
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author | Liu, Yukun Cleveland, Iver J. Tran, Minh N. Aydil, Eray S. |
author_facet | Liu, Yukun Cleveland, Iver J. Tran, Minh N. Aydil, Eray S. |
author_sort | Liu, Yukun |
collection | PubMed |
description | [Image: see text] Cs(2)AgInBr(6) is among the lead-free halide perovskites of interest, predicted by first-principles calculations to be stable with a direct band gap, but there has been only one report of its synthesis. Herein we report the formation of Cs(2)AgInBr(6) thin films through thermal evaporation of CsBr, AgBr, and InBr(3) and subsequent annealing between 130 °C and 250 °C. Cs(2)AgInBr(6) appears stable in this temperature range. However, Cs(2)AgInBr(6) thin films are thermodynamically unstable at room temperature, remaining cubic only long enough to be characterized but not long enough to be useful for practical devices. Cs(2)AgInBr(6) decomposed into Cs(2)AgBr(3), Cs(3)In(2)Br(9), AgBr, and InBr(3) upon cooling from 130 °C to 250 °C to room temperature. This conclusion did not depend on illumination, film thickness, annealing environment, or details of the film formation, pointing to an intrinsic thermodynamic instability of the material. Optical absorption measurements may be interpreted as Cs(2)AgInBr(6) having a direct band gap of 1.57 ± 0.1 eV. |
format | Online Article Text |
id | pubmed-10068733 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2023 |
publisher | American Chemical Society |
record_format | MEDLINE/PubMed |
spelling | pubmed-100687332023-04-04 Stability of the Halide Double Perovskite Cs(2)AgInBr(6) Liu, Yukun Cleveland, Iver J. Tran, Minh N. Aydil, Eray S. J Phys Chem Lett [Image: see text] Cs(2)AgInBr(6) is among the lead-free halide perovskites of interest, predicted by first-principles calculations to be stable with a direct band gap, but there has been only one report of its synthesis. Herein we report the formation of Cs(2)AgInBr(6) thin films through thermal evaporation of CsBr, AgBr, and InBr(3) and subsequent annealing between 130 °C and 250 °C. Cs(2)AgInBr(6) appears stable in this temperature range. However, Cs(2)AgInBr(6) thin films are thermodynamically unstable at room temperature, remaining cubic only long enough to be characterized but not long enough to be useful for practical devices. Cs(2)AgInBr(6) decomposed into Cs(2)AgBr(3), Cs(3)In(2)Br(9), AgBr, and InBr(3) upon cooling from 130 °C to 250 °C to room temperature. This conclusion did not depend on illumination, film thickness, annealing environment, or details of the film formation, pointing to an intrinsic thermodynamic instability of the material. Optical absorption measurements may be interpreted as Cs(2)AgInBr(6) having a direct band gap of 1.57 ± 0.1 eV. American Chemical Society 2023-03-21 /pmc/articles/PMC10068733/ /pubmed/36943190 http://dx.doi.org/10.1021/acs.jpclett.3c00303 Text en © 2023 The Authors. Published by American Chemical Society https://creativecommons.org/licenses/by/4.0/Permits the broadest form of re-use including for commercial purposes, provided that author attribution and integrity are maintained (https://creativecommons.org/licenses/by/4.0/). |
spellingShingle | Liu, Yukun Cleveland, Iver J. Tran, Minh N. Aydil, Eray S. Stability of the Halide Double Perovskite Cs(2)AgInBr(6) |
title | Stability of the Halide Double Perovskite Cs(2)AgInBr(6) |
title_full | Stability of the Halide Double Perovskite Cs(2)AgInBr(6) |
title_fullStr | Stability of the Halide Double Perovskite Cs(2)AgInBr(6) |
title_full_unstemmed | Stability of the Halide Double Perovskite Cs(2)AgInBr(6) |
title_short | Stability of the Halide Double Perovskite Cs(2)AgInBr(6) |
title_sort | stability of the halide double perovskite cs(2)aginbr(6) |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10068733/ https://www.ncbi.nlm.nih.gov/pubmed/36943190 http://dx.doi.org/10.1021/acs.jpclett.3c00303 |
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