Single Crystals of Mixed-Cation Copper-Based Perovskite with Trimodal Bandgap Behavior

Amr Elattar; Wenhui Li; Hiroo Suzuki; Takashi Kambe; Takeshi Nishikawa; Aung Ko Ko Kyaw; Yasuhiko Hayashi

doi:10.1002/chem.202104316

Single Crystals of Mixed-Cation Copper-Based Perovskite with Trimodal Bandgap Behavior

Amr Elattar, Wenhui Li, Hiroo Suzuki, Takashi Kambe, Takeshi Nishikawa, Aung Ko Ko Kyaw, Yasuhiko Hayashi

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

Abstract

Two-dimensional (2D) hybrid perovskites with novel functionalities and structural diversity are a perfect platform for emerging optoelectronic devices such as photodetectors, light-emitting diodes, and solar cells. Here, we demonstrate that excess concentration of Cesium bromide (CsBr) is key to the formation of easily exfoliated 2D Cs₂Cu(Cl/Br)₄ perovskite crystal. Furthermore, by employing this trick to 2D perovskite MA₂Cu(Cl/Br)₄ (MA=methylammonium), we achieve a phase-pure easily exfoliated 2D mixed-cation (MA/Cs)₂Cu(Cl/Br)₄ perovskite crystal, which exhibits reduced bandgap (1.53 eV) with ferromagnetic behavior and photovoltaic property. The resultant mixed-cation structured device reveals enhanced efficiency compared to all MA and all Cs counterparts. These findings demonstrate the importance of cation-engineering in developing innovative materials with novel properties.

Original language	English
Article number	e202104316
Journal	Chemistry - A European Journal
Volume	28
Issue number	26
DOIs	https://doi.org/10.1002/chem.202104316
Publication status	Published - May 6 2022

Keywords

copper
exfoliation
mixed cation
perovskite
solar cells
two dimensional

ASJC Scopus subject areas

Catalysis
Organic Chemistry

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

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10.1002/chem.202104316

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title = "Single Crystals of Mixed-Cation Copper-Based Perovskite with Trimodal Bandgap Behavior",

abstract = "Two-dimensional (2D) hybrid perovskites with novel functionalities and structural diversity are a perfect platform for emerging optoelectronic devices such as photodetectors, light-emitting diodes, and solar cells. Here, we demonstrate that excess concentration of Cesium bromide (CsBr) is key to the formation of easily exfoliated 2D Cs2Cu(Cl/Br)4 perovskite crystal. Furthermore, by employing this trick to 2D perovskite MA2Cu(Cl/Br)4 (MA=methylammonium), we achieve a phase-pure easily exfoliated 2D mixed-cation (MA/Cs)2Cu(Cl/Br)4 perovskite crystal, which exhibits reduced bandgap (1.53 eV) with ferromagnetic behavior and photovoltaic property. The resultant mixed-cation structured device reveals enhanced efficiency compared to all MA and all Cs counterparts. These findings demonstrate the importance of cation-engineering in developing innovative materials with novel properties.",

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author = "Amr Elattar and Wenhui Li and Hiroo Suzuki and Takashi Kambe and Takeshi Nishikawa and Kyaw, {Aung Ko Ko} and Yasuhiko Hayashi",

note = "Funding Information: A.E. acknowledges the financial support from the ministry of higher education, Egypt for his PhD scholarship (EJEP). We would like to thank Enago ( https://www.enago.com/ ) for their English language editing service. A.K is thankful to financial support from National Natural Science Foundation of China (Grant No. 62150610496) and Guangdong Basic and Applied Basic Research Foundation (2020A1515010916). Publisher Copyright: {\textcopyright} 2022 Wiley-VCH GmbH.",

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AU - Elattar, Amr

AU - Li, Wenhui

AU - Suzuki, Hiroo

AU - Kambe, Takashi

AU - Nishikawa, Takeshi

AU - Kyaw, Aung Ko Ko

AU - Hayashi, Yasuhiko

N1 - Funding Information: A.E. acknowledges the financial support from the ministry of higher education, Egypt for his PhD scholarship (EJEP). We would like to thank Enago ( https://www.enago.com/ ) for their English language editing service. A.K is thankful to financial support from National Natural Science Foundation of China (Grant No. 62150610496) and Guangdong Basic and Applied Basic Research Foundation (2020A1515010916). Publisher Copyright: © 2022 Wiley-VCH GmbH.

PY - 2022/5/6

Y1 - 2022/5/6

N2 - Two-dimensional (2D) hybrid perovskites with novel functionalities and structural diversity are a perfect platform for emerging optoelectronic devices such as photodetectors, light-emitting diodes, and solar cells. Here, we demonstrate that excess concentration of Cesium bromide (CsBr) is key to the formation of easily exfoliated 2D Cs2Cu(Cl/Br)4 perovskite crystal. Furthermore, by employing this trick to 2D perovskite MA2Cu(Cl/Br)4 (MA=methylammonium), we achieve a phase-pure easily exfoliated 2D mixed-cation (MA/Cs)2Cu(Cl/Br)4 perovskite crystal, which exhibits reduced bandgap (1.53 eV) with ferromagnetic behavior and photovoltaic property. The resultant mixed-cation structured device reveals enhanced efficiency compared to all MA and all Cs counterparts. These findings demonstrate the importance of cation-engineering in developing innovative materials with novel properties.

AB - Two-dimensional (2D) hybrid perovskites with novel functionalities and structural diversity are a perfect platform for emerging optoelectronic devices such as photodetectors, light-emitting diodes, and solar cells. Here, we demonstrate that excess concentration of Cesium bromide (CsBr) is key to the formation of easily exfoliated 2D Cs2Cu(Cl/Br)4 perovskite crystal. Furthermore, by employing this trick to 2D perovskite MA2Cu(Cl/Br)4 (MA=methylammonium), we achieve a phase-pure easily exfoliated 2D mixed-cation (MA/Cs)2Cu(Cl/Br)4 perovskite crystal, which exhibits reduced bandgap (1.53 eV) with ferromagnetic behavior and photovoltaic property. The resultant mixed-cation structured device reveals enhanced efficiency compared to all MA and all Cs counterparts. These findings demonstrate the importance of cation-engineering in developing innovative materials with novel properties.

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Single Crystals of Mixed-Cation Copper-Based Perovskite with Trimodal Bandgap Behavior

Abstract

Keywords

ASJC Scopus subject areas

UN SDGs

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