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Title: In situ Investigation of Water Interaction with Lead-Free All Inorganic Perovskite (Cs 2 SnI x Cl 6–x )

Abstract

Hybrid halide perovskites display a great tunability of optoelectronic properties and environmental stability by controlling the halogen anions (e.g., I, Cl, and Br). Yet, their water interaction and degradation mechanisms are not completely elucidated. In this work, the interaction of Cs 2SnCl 6 and Cl-enriched solid solution Cs 2SnI 0.9Cl 5.1 with water was systematically studied by in situ synchrotron X-ray diffraction and micro-Raman spectra and compared with the isostructural Cs 2SnI 6. Unlike Cs 2SnI 6, which experiences a direct dissolution in water, Cs 2SnCl 6 displays an enhanced stability and the dissolution of the Cs 2SnCl 6 accompanies with the formation of an amorphous alteration phase. Under controlled dehydration conditions, two-dimensional Cs 2SnCl 6 flakes can be precipitated out from water solution. Moreover, the mixed halide perovskite (Cs 2SnI 0.9Cl 5.1) experiences fast iodide dissolution in water solution and transforms to a more chloride-enriched perovskite which shows a behavior similar to Cs 2SnCl 6. The mechanistic understanding of the dissolution–precipitation process of Cs 2SnI xCl 6–x perovskites is useful for developing new perovskites with varied halogen and controlled environmental stability.

Authors:
 [1];  [1];  [1];  [2];  [1];  [1]; ORCiD logo [1]
  1. Rensselaer Polytechnic Inst., Troy, NY (United States)
  2. Argonne National Lab. (ANL), Lemont, IL (United States)
Publication Date:
Research Org.:
Argonne National Lab. (ANL), Argonne, IL (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
OSTI Identifier:
1548287
Grant/Contract Number:  
AC02-06CH11357; SC0016584
Resource Type:
Accepted Manuscript
Journal Name:
Journal of Physical Chemistry. C
Additional Journal Information:
Journal Volume: 123; Journal Issue: 14; Journal ID: ISSN 1932-7447
Publisher:
American Chemical Society
Country of Publication:
United States
Language:
English
Subject:
Hybrid halide perovskites; water interaction; iodide dissolution; recrystallization

Citation Formats

Zhu, Weiguang, Yao, Tiankai, Shen, Junhua, Xu, Wenqian, Gong, Bowen, Wang, Yachun, and Lian, Jie. In situ Investigation of Water Interaction with Lead-Free All Inorganic Perovskite (Cs 2 SnI x Cl 6–x ). United States: N. p., 2019. Web. doi:10.1021/acs.jpcc.9b00720.
Zhu, Weiguang, Yao, Tiankai, Shen, Junhua, Xu, Wenqian, Gong, Bowen, Wang, Yachun, & Lian, Jie. In situ Investigation of Water Interaction with Lead-Free All Inorganic Perovskite (Cs 2 SnI x Cl 6–x ). United States. doi:10.1021/acs.jpcc.9b00720.
Zhu, Weiguang, Yao, Tiankai, Shen, Junhua, Xu, Wenqian, Gong, Bowen, Wang, Yachun, and Lian, Jie. Fri . "In situ Investigation of Water Interaction with Lead-Free All Inorganic Perovskite (Cs 2 SnI x Cl 6–x )". United States. doi:10.1021/acs.jpcc.9b00720.
@article{osti_1548287,
title = {In situ Investigation of Water Interaction with Lead-Free All Inorganic Perovskite (Cs 2 SnI x Cl 6–x )},
author = {Zhu, Weiguang and Yao, Tiankai and Shen, Junhua and Xu, Wenqian and Gong, Bowen and Wang, Yachun and Lian, Jie},
abstractNote = {Hybrid halide perovskites display a great tunability of optoelectronic properties and environmental stability by controlling the halogen anions (e.g., I, Cl, and Br). Yet, their water interaction and degradation mechanisms are not completely elucidated. In this work, the interaction of Cs2SnCl6 and Cl-enriched solid solution Cs2SnI0.9Cl5.1 with water was systematically studied by in situ synchrotron X-ray diffraction and micro-Raman spectra and compared with the isostructural Cs2SnI6. Unlike Cs2SnI6, which experiences a direct dissolution in water, Cs2SnCl6 displays an enhanced stability and the dissolution of the Cs2SnCl6 accompanies with the formation of an amorphous alteration phase. Under controlled dehydration conditions, two-dimensional Cs2SnCl6 flakes can be precipitated out from water solution. Moreover, the mixed halide perovskite (Cs2SnI0.9Cl5.1) experiences fast iodide dissolution in water solution and transforms to a more chloride-enriched perovskite which shows a behavior similar to Cs2SnCl6. The mechanistic understanding of the dissolution–precipitation process of Cs2SnIxCl6–x perovskites is useful for developing new perovskites with varied halogen and controlled environmental stability.},
doi = {10.1021/acs.jpcc.9b00720},
journal = {Journal of Physical Chemistry. C},
number = 14,
volume = 123,
place = {United States},
year = {2019},
month = {3}
}

Journal Article:
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This content will become publicly available on March 22, 2020
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