Phase Engineering for Stability of CsPbI3 Nanowire Optoelectronics

Dengji Li; Pengshan Xie; Yuxuan Zhang; You Meng; Yancong Chen; Yini Zheng; Weijun Wang; Di Yin; Bowen Li; Zenghui Wu; Changyong Lan; SenPo Yip; Dangyuan Lei; Fu-Rong Chen; Johnny C. Ho

doi:10.1002/adfm.202314309

Phase Engineering for Stability of CsPbI₃ Nanowire Optoelectronics

Dengji Li, Pengshan Xie, Yuxuan Zhang, You Meng, Yancong Chen, Yini Zheng, Weijun Wang, Di Yin, Bowen Li, Zenghui Wu, Changyong Lan, SenPo Yip, Dangyuan Lei, Fu-Rong Chen, Johnny C. Ho^*

^*Corresponding author for this work

Department of Materials Science and Engineering

Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review

4 Citations (Scopus)

27 Downloads (CityUHK Scholars)

Abstract

Zinc (Zn) has arisen as a significant suppressor of vacancy formation in halide perovskites, establishing its pivotal role in defect engineering for these materials. Herein, the Zn-catalyzed vapor-liquid-solid (VLS) route is reported to render black-phase CsPbI₃ nanowires (NWs) operationally stable at room temperature. Based on first-principle calculations, the doped Zn²⁺ can not only lead to the partial crystal lattice distortion but also reduce the formation energy (absolute value) from the black phase to the yellow phase, improving the stability of the desired black-phase CsPbI₃ NWs. A series of contrast tests further confirm the stabilization effect of the Zn-doped strategy. Besides, the polarization-sensitive characteristics of black-phase CsPbI₃ NWs are revealed. This work highlights the importance of phase stabilization engineering for CsPbI₃ NWs and their potential applications in anisotropic optoelectronics. © 2024 The Authors. Advanced Functional Materials published by Wiley-VCH GmbH.

Original language	English
Article number	2314309
Journal	Advanced Functional Materials
Volume	34
Issue number	21
Online published	31 Jan 2024
DOIs	https://doi.org/10.1002/adfm.202314309
Publication status	Published - 22 May 2024

Funding

D.L. and P.S.X. contributed equally to this research, which was financially supported by a fellowship grant (CityU RFS2021-1S04) and a Collaborative Research Equipment Grant (C1015-21EF), both awarded by the Research Grants Council of the Hong Kong Special Administrative Region, China.

Research Keywords

halide perovskite
nanowire
optoelectronic anisotropy
vacancy suppressor
Zn-doping

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This full text is made available under CC-BY-NC-ND 4.0. https://creativecommons.org/licenses/by-nc-nd/4.0/

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title = "Phase Engineering for Stability of CsPbI3 Nanowire Optoelectronics",

abstract = "Zinc (Zn) has arisen as a significant suppressor of vacancy formation in halide perovskites, establishing its pivotal role in defect engineering for these materials. Herein, the Zn-catalyzed vapor-liquid-solid (VLS) route is reported to render black-phase CsPbI3 nanowires (NWs) operationally stable at room temperature. Based on first-principle calculations, the doped Zn2+ can not only lead to the partial crystal lattice distortion but also reduce the formation energy (absolute value) from the black phase to the yellow phase, improving the stability of the desired black-phase CsPbI3 NWs. A series of contrast tests further confirm the stabilization effect of the Zn-doped strategy. Besides, the polarization-sensitive characteristics of black-phase CsPbI3 NWs are revealed. This work highlights the importance of phase stabilization engineering for CsPbI3 NWs and their potential applications in anisotropic optoelectronics. {\textcopyright} 2024 The Authors. Advanced Functional Materials published by Wiley-VCH GmbH.",

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author = "Dengji Li and Pengshan Xie and Yuxuan Zhang and You Meng and Yancong Chen and Yini Zheng and Weijun Wang and Di Yin and Bowen Li and Zenghui Wu and Changyong Lan and SenPo Yip and Dangyuan Lei and Fu-Rong Chen and Ho, {Johnny C.}",

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volume = "34",

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TY - JOUR

T1 - Phase Engineering for Stability of CsPbI3 Nanowire Optoelectronics

AU - Li, Dengji

AU - Xie, Pengshan

AU - Zhang, Yuxuan

AU - Meng, You

AU - Chen, Yancong

AU - Zheng, Yini

AU - Wang, Weijun

AU - Yin, Di

AU - Li, Bowen

AU - Wu, Zenghui

AU - Lan, Changyong

AU - Yip, SenPo

AU - Lei, Dangyuan

AU - Chen, Fu-Rong

AU - Ho, Johnny C.

PY - 2024/5/22

Y1 - 2024/5/22

N2 - Zinc (Zn) has arisen as a significant suppressor of vacancy formation in halide perovskites, establishing its pivotal role in defect engineering for these materials. Herein, the Zn-catalyzed vapor-liquid-solid (VLS) route is reported to render black-phase CsPbI3 nanowires (NWs) operationally stable at room temperature. Based on first-principle calculations, the doped Zn2+ can not only lead to the partial crystal lattice distortion but also reduce the formation energy (absolute value) from the black phase to the yellow phase, improving the stability of the desired black-phase CsPbI3 NWs. A series of contrast tests further confirm the stabilization effect of the Zn-doped strategy. Besides, the polarization-sensitive characteristics of black-phase CsPbI3 NWs are revealed. This work highlights the importance of phase stabilization engineering for CsPbI3 NWs and their potential applications in anisotropic optoelectronics. © 2024 The Authors. Advanced Functional Materials published by Wiley-VCH GmbH.

AB - Zinc (Zn) has arisen as a significant suppressor of vacancy formation in halide perovskites, establishing its pivotal role in defect engineering for these materials. Herein, the Zn-catalyzed vapor-liquid-solid (VLS) route is reported to render black-phase CsPbI3 nanowires (NWs) operationally stable at room temperature. Based on first-principle calculations, the doped Zn2+ can not only lead to the partial crystal lattice distortion but also reduce the formation energy (absolute value) from the black phase to the yellow phase, improving the stability of the desired black-phase CsPbI3 NWs. A series of contrast tests further confirm the stabilization effect of the Zn-doped strategy. Besides, the polarization-sensitive characteristics of black-phase CsPbI3 NWs are revealed. This work highlights the importance of phase stabilization engineering for CsPbI3 NWs and their potential applications in anisotropic optoelectronics. © 2024 The Authors. Advanced Functional Materials published by Wiley-VCH GmbH.

KW - halide perovskite

KW - nanowire

KW - optoelectronic anisotropy

KW - vacancy suppressor

KW - Zn-doping

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M3 - RGC 21 - Publication in refereed journal

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JF - Advanced Functional Materials

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ER -

Phase Engineering for Stability of CsPbI₃ Nanowire Optoelectronics

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RFS: Developing Negative-Capacitance Nanowire Transistor Arrays and Integrated Circuits for Next-Generation Flexible Electronics

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Phase Engineering for Stability of CsPbI3 Nanowire Optoelectronics

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RFS: Developing Negative-Capacitance Nanowire Transistor Arrays and Integrated Circuits for Next-Generation Flexible Electronics

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Phase Engineering for Stability of CsPbI₃ Nanowire Optoelectronics