CH3NH2 gas induced (110) preferred cesium-containing perovskite films with reduced PbI6 octahedron distortion and enhanced moisture stability

Yue Chang; Li Wang; Jiliang Zhang; Zhongmin Zhou; Chongwen Li; Bingbing Chen; Lioz Etgar; Guanglei Cui; Shuping Pang

doi:10.1039/c6ta10444d

CH₃NH₂ gas induced (110) preferred cesium-containing perovskite films with reduced PbI₆ octahedron distortion and enhanced moisture stability

Yue Chang, Li Wang, Jiliang Zhang, Zhongmin Zhou, Chongwen Li, Bingbing Chen, Lioz Etgar, Guanglei Cui^*, Shuping Pang

^*Corresponding author for this work

Institute of Chemistry

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

34 Scopus citations

Abstract

We report here the discovery of a fancy interaction between cesium iodide (CsI) and methylamine (CH₃NH₂) due to the presence of the hydrogen bond. The formed CsI·xCH₃NH₂ is a liquid phase, which facilitates the large scale fabrication of highly uniform cesium-containing perovskite films with strong (110) preferred orientation by the CH₃NH₂ gas healing process. With this method, at most 10% nonpolar Cs cations could fully dope into the crystal lattice and extremely enhance the interaction of the inorganic framework with a more symmetrical PbI₆ octahedron, resulting in obvious improvement in moisture stability under continuous illumination.

Original language	English
Pages (from-to)	4803-4808
Number of pages	6
Journal	Journal of Materials Chemistry A
Volume	5
Issue number	10
DOIs	https://doi.org/10.1039/c6ta10444d
State	Published - 2017

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© The Royal Society of Chemistry.

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abstract = "We report here the discovery of a fancy interaction between cesium iodide (CsI) and methylamine (CH3NH2) due to the presence of the hydrogen bond. The formed CsI·xCH3NH2 is a liquid phase, which facilitates the large scale fabrication of highly uniform cesium-containing perovskite films with strong (110) preferred orientation by the CH3NH2 gas healing process. With this method, at most 10% nonpolar Cs cations could fully dope into the crystal lattice and extremely enhance the interaction of the inorganic framework with a more symmetrical PbI6 octahedron, resulting in obvious improvement in moisture stability under continuous illumination.",

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T1 - CH3NH2 gas induced (110) preferred cesium-containing perovskite films with reduced PbI6 octahedron distortion and enhanced moisture stability

AU - Chang, Yue

AU - Wang, Li

AU - Zhang, Jiliang

AU - Zhou, Zhongmin

AU - Li, Chongwen

AU - Chen, Bingbing

AU - Etgar, Lioz

AU - Cui, Guanglei

AU - Pang, Shuping

PY - 2017

Y1 - 2017

N2 - We report here the discovery of a fancy interaction between cesium iodide (CsI) and methylamine (CH3NH2) due to the presence of the hydrogen bond. The formed CsI·xCH3NH2 is a liquid phase, which facilitates the large scale fabrication of highly uniform cesium-containing perovskite films with strong (110) preferred orientation by the CH3NH2 gas healing process. With this method, at most 10% nonpolar Cs cations could fully dope into the crystal lattice and extremely enhance the interaction of the inorganic framework with a more symmetrical PbI6 octahedron, resulting in obvious improvement in moisture stability under continuous illumination.

AB - We report here the discovery of a fancy interaction between cesium iodide (CsI) and methylamine (CH3NH2) due to the presence of the hydrogen bond. The formed CsI·xCH3NH2 is a liquid phase, which facilitates the large scale fabrication of highly uniform cesium-containing perovskite films with strong (110) preferred orientation by the CH3NH2 gas healing process. With this method, at most 10% nonpolar Cs cations could fully dope into the crystal lattice and extremely enhance the interaction of the inorganic framework with a more symmetrical PbI6 octahedron, resulting in obvious improvement in moisture stability under continuous illumination.

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CH₃NH₂ gas induced (110) preferred cesium-containing perovskite films with reduced PbI₆ octahedron distortion and enhanced moisture stability

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