Stability of Cs2NaBiBr6 and Cs2NaBiCl6

Minh N. Tran; Rafaella Saa Rodriguez; Joseph R. Geniesse; Kajini Sandrakumar; Iver J. Cleveland; Eray S. Aydil

doi:10.1021/acs.inorgchem.4c01299

Stability of Cs₂NaBiBr₆ and Cs₂NaBiCl₆

Minh N. Tran, Rafaella Saa Rodriguez, Joseph R. Geniesse, Kajini Sandrakumar, Iver J. Cleveland, Eray S. Aydil

Chemical and Biomolecular Engineering

Research output: Contribution to journal › Article › peer-review

Abstract

Bismuth-based halide perovskites are nontoxic alternatives to widely studied lead-based perovskites for optoelectronic applications. Here, we synthesized Cs₂NaBiCl₆ thin films and attempted to synthesize Cs₂NaBiBr₆ using physical vapor deposition. While Cs₂NaBiCl₆ forms a stable cubic structure with a 3.4 eV band gap and could be synthesized successfully, Cs₂NaBiBr₆ does not form and is unstable with respect to dissociation into Cs_3-xNa_xBi₂Br₉ and Cs_3-xNa_xBiBr₆. Furthermore, the close X-ray diffraction patterns of Cs_3-xNa_xBi₂Br₉ and Cs₂NaBiBr₆ raise doubts about the previous reports of the latter’s formation based on X-ray diffraction alone.

Original language	English (US)
Pages (from-to)	12818-12825
Number of pages	8
Journal	Inorganic Chemistry
Volume	63
Issue number	28
DOIs	https://doi.org/10.1021/acs.inorgchem.4c01299
State	Published - Jul 15 2024

ASJC Scopus subject areas

Physical and Theoretical Chemistry
Inorganic Chemistry

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10.1021/acs.inorgchem.4c01299

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title = "Stability of Cs2NaBiBr6 and Cs2NaBiCl6",

abstract = "Bismuth-based halide perovskites are nontoxic alternatives to widely studied lead-based perovskites for optoelectronic applications. Here, we synthesized Cs2NaBiCl6 thin films and attempted to synthesize Cs2NaBiBr6 using physical vapor deposition. While Cs2NaBiCl6 forms a stable cubic structure with a 3.4 eV band gap and could be synthesized successfully, Cs2NaBiBr6 does not form and is unstable with respect to dissociation into Cs3-xNaxBi2Br9 and Cs3-xNaxBiBr6. Furthermore, the close X-ray diffraction patterns of Cs3-xNaxBi2Br9 and Cs2NaBiBr6 raise doubts about the previous reports of the latter{\textquoteright}s formation based on X-ray diffraction alone.",

author = "Tran, {Minh N.} and Rodriguez, {Rafaella Saa} and Geniesse, {Joseph R.} and Kajini Sandrakumar and Cleveland, {Iver J.} and Aydil, {Eray S.}",

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language = "English (US)",

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T1 - Stability of Cs2NaBiBr6 and Cs2NaBiCl6

AU - Tran, Minh N.

AU - Rodriguez, Rafaella Saa

AU - Geniesse, Joseph R.

AU - Sandrakumar, Kajini

AU - Cleveland, Iver J.

AU - Aydil, Eray S.

PY - 2024/7/15

Y1 - 2024/7/15

N2 - Bismuth-based halide perovskites are nontoxic alternatives to widely studied lead-based perovskites for optoelectronic applications. Here, we synthesized Cs2NaBiCl6 thin films and attempted to synthesize Cs2NaBiBr6 using physical vapor deposition. While Cs2NaBiCl6 forms a stable cubic structure with a 3.4 eV band gap and could be synthesized successfully, Cs2NaBiBr6 does not form and is unstable with respect to dissociation into Cs3-xNaxBi2Br9 and Cs3-xNaxBiBr6. Furthermore, the close X-ray diffraction patterns of Cs3-xNaxBi2Br9 and Cs2NaBiBr6 raise doubts about the previous reports of the latter’s formation based on X-ray diffraction alone.

AB - Bismuth-based halide perovskites are nontoxic alternatives to widely studied lead-based perovskites for optoelectronic applications. Here, we synthesized Cs2NaBiCl6 thin films and attempted to synthesize Cs2NaBiBr6 using physical vapor deposition. While Cs2NaBiCl6 forms a stable cubic structure with a 3.4 eV band gap and could be synthesized successfully, Cs2NaBiBr6 does not form and is unstable with respect to dissociation into Cs3-xNaxBi2Br9 and Cs3-xNaxBiBr6. Furthermore, the close X-ray diffraction patterns of Cs3-xNaxBi2Br9 and Cs2NaBiBr6 raise doubts about the previous reports of the latter’s formation based on X-ray diffraction alone.

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JO - Inorganic Chemistry

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ER -

Stability of Cs₂NaBiBr₆ and Cs₂NaBiCl₆

Abstract

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