Thiocyanate-Mediated Dimensionality Transformation of Low-Dimensional Perovskites for Photovoltaics

Li Hong; Zaiwei Wang; Jovana V. Milić; Claudia E. Avalos; Weihua Zhang; Dan Ren; Cheng Wang; Brian Carlsen; Yuhang Liu; Shaik Mohammed Zakeeruddin; Anders Hagfeldt; Ti Wang; Hongwei Han; Michael Graetzel

doi:10.1021/acs.chemmater.2c00760

Thiocyanate-Mediated Dimensionality Transformation of Low-Dimensional Perovskites for Photovoltaics

Li Hong, Zaiwei Wang, Jovana V. Milić, Claudia E. Avalos, Weihua Zhang, Dan Ren, Cheng Wang, Brian Carlsen, Yuhang Liu, Shaik Mohammed Zakeeruddin, Anders Hagfeldt, Ti Wang, Hongwei Han, Michael Graetzel

Chemistry

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

Abstract

Two-dimensional (2D) hybrid perovskite solar cells have induced widespread research interest owing to their higher stability as compared to three-dimensional (3D) analogues. The photovoltaic performance, however, is still limited. Here, we report a perovskite film dominated by 3D components that are modulated by formamidinium thiocyanate in the 2D PEA₂FA₃Pb₄I₁₃perovskite composition. We demonstrate that a dimensionality transformation from a 2D/3D to predominantly 3D perovskite phase in the presence of SCN-based treatment enhances the optical absorption in visible and near-infrared regions. As a result, the power conversion efficiency improved 4.5 times with respect to the control to above 14%. The unencapsulated cell exhibited excellent moisture stability during the shelf lifetime measurement over 70 days under ambient conditions.

Original language	English (US)
Pages (from-to)	6331-6338
Number of pages	8
Journal	Chemistry of Materials
Volume	34
Issue number	14
DOIs	https://doi.org/10.1021/acs.chemmater.2c00760
State	Published - Jul 26 2022

ASJC Scopus subject areas

General Chemistry
General Chemical Engineering
Materials Chemistry

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10.1021/acs.chemmater.2c00760

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title = "Thiocyanate-Mediated Dimensionality Transformation of Low-Dimensional Perovskites for Photovoltaics",

abstract = "Two-dimensional (2D) hybrid perovskite solar cells have induced widespread research interest owing to their higher stability as compared to three-dimensional (3D) analogues. The photovoltaic performance, however, is still limited. Here, we report a perovskite film dominated by 3D components that are modulated by formamidinium thiocyanate in the 2D PEA2FA3Pb4I13perovskite composition. We demonstrate that a dimensionality transformation from a 2D/3D to predominantly 3D perovskite phase in the presence of SCN-based treatment enhances the optical absorption in visible and near-infrared regions. As a result, the power conversion efficiency improved 4.5 times with respect to the control to above 14%. The unencapsulated cell exhibited excellent moisture stability during the shelf lifetime measurement over 70 days under ambient conditions.",

author = "Li Hong and Zaiwei Wang and Mili{\'c}, {Jovana V.} and Avalos, {Claudia E.} and Weihua Zhang and Dan Ren and Cheng Wang and Brian Carlsen and Yuhang Liu and Zakeeruddin, {Shaik Mohammed} and Anders Hagfeldt and Ti Wang and Hongwei Han and Michael Graetzel",

year = "2022",

month = jul,

day = "26",

doi = "10.1021/acs.chemmater.2c00760",

language = "English (US)",

volume = "34",

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T1 - Thiocyanate-Mediated Dimensionality Transformation of Low-Dimensional Perovskites for Photovoltaics

AU - Hong, Li

AU - Wang, Zaiwei

AU - Milić, Jovana V.

AU - Avalos, Claudia E.

AU - Zhang, Weihua

AU - Ren, Dan

AU - Wang, Cheng

AU - Carlsen, Brian

AU - Liu, Yuhang

AU - Zakeeruddin, Shaik Mohammed

AU - Hagfeldt, Anders

AU - Wang, Ti

AU - Han, Hongwei

AU - Graetzel, Michael

PY - 2022/7/26

Y1 - 2022/7/26

N2 - Two-dimensional (2D) hybrid perovskite solar cells have induced widespread research interest owing to their higher stability as compared to three-dimensional (3D) analogues. The photovoltaic performance, however, is still limited. Here, we report a perovskite film dominated by 3D components that are modulated by formamidinium thiocyanate in the 2D PEA2FA3Pb4I13perovskite composition. We demonstrate that a dimensionality transformation from a 2D/3D to predominantly 3D perovskite phase in the presence of SCN-based treatment enhances the optical absorption in visible and near-infrared regions. As a result, the power conversion efficiency improved 4.5 times with respect to the control to above 14%. The unencapsulated cell exhibited excellent moisture stability during the shelf lifetime measurement over 70 days under ambient conditions.

AB - Two-dimensional (2D) hybrid perovskite solar cells have induced widespread research interest owing to their higher stability as compared to three-dimensional (3D) analogues. The photovoltaic performance, however, is still limited. Here, we report a perovskite film dominated by 3D components that are modulated by formamidinium thiocyanate in the 2D PEA2FA3Pb4I13perovskite composition. We demonstrate that a dimensionality transformation from a 2D/3D to predominantly 3D perovskite phase in the presence of SCN-based treatment enhances the optical absorption in visible and near-infrared regions. As a result, the power conversion efficiency improved 4.5 times with respect to the control to above 14%. The unencapsulated cell exhibited excellent moisture stability during the shelf lifetime measurement over 70 days under ambient conditions.

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U2 - 10.1021/acs.chemmater.2c00760

DO - 10.1021/acs.chemmater.2c00760

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JO - Chemistry of Materials

JF - Chemistry of Materials

IS - 14

ER -

Thiocyanate-Mediated Dimensionality Transformation of Low-Dimensional Perovskites for Photovoltaics

Abstract

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