Light-Induced Self-Assembly of Cubic CsPbBr3 Perovskite Nanocrystals into Nanowires

Jiakai Liu; Kepeng Song; Yongwoo Shin; Xin Liu; Jie Chen; Ke Xin Yao; Jun Pan; Chen Yang; Jun Yin; Liang Jin Xu; Haoze Yang; Ahmed M. El-Zohry; Bin Xin; Somak Mitra; Mohamed Nejib Hedhili; Iman S. Roqan; Omar F. Mohammed; Yu Han; Osman M. Bakr

doi:10.1021/acs.chemmater.9b00680

Light-Induced Self-Assembly of Cubic CsPbBr₃ Perovskite Nanocrystals into Nanowires

Jiakai Liu, Kepeng Song, Yongwoo Shin, Xin Liu, Jie Chen, Ke Xin Yao, Jun Pan, Chen Yang, Jun Yin, Liang Jin Xu, Haoze Yang, Ahmed M. El-Zohry, Bin Xin, Somak Mitra, Mohamed Nejib Hedhili, Iman S. Roqan, Omar F. Mohammed^*, Yu Han, Osman M. Bakr

^*Corresponding author for this work

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

142 Scopus citations

Abstract

The rapid development of halide perovskite synthesis offers the opportunity to fabricate high-quality perovskite nanocrystals (NCs), whose structural uniformity can lead to assembled supra-structures with improved device performance and novel collective properties. Light is known to significantly affect the structure and properties of halide perovskites and plays a crucial role in the growth and assembly of their crystals. Nevertheless, the light-induced growth mechanisms of perovskite NCs are not yet clearly understood. In this work, we performed a systematic study of the visible-light-induced template-free synthesis of CsPbBr₃ nanowires (NWs) generated through self-assembly of cubic (in phase and close to cubic morphology) NCs. Using atomic-resolution electron microscopy, we visualized the cubic-to-orthorhombic phase transition in NCs and the interface between coalesced NCs. Remarkably, the images of the interface revealed the coexistence of CsBr and PbBr₂ surface terminations in halide perovskites. Our results shed light on the mechanism underlying the observed anisotropic assembly of halide perovskites and elucidate the vital role of light illumination during this process. More importantly, as an elegant and promising green-chemistry approach, light-induced self-assembly represents a rational method for designing perovskites.

Original language	English
Pages (from-to)	6642-6649
Number of pages	8
Journal	Chemistry of Materials
Volume	31
Issue number	17
DOIs	https://doi.org/10.1021/acs.chemmater.9b00680
State	Published - 10 Sep 2019
Externally published	Yes

Bibliographical note

Publisher Copyright:
© 2019 American Chemical Society.

ASJC Scopus subject areas

General Chemistry
General Chemical Engineering
Materials Chemistry

Access to Document

10.1021/acs.chemmater.9b00680

Cite this

Liu, J., Song, K., Shin, Y., Liu, X., Chen, J., Yao, K. X., Pan, J., Yang, C., Yin, J., Xu, L. J., Yang, H., El-Zohry, A. M., Xin, B., Mitra, S., Hedhili, M. N., Roqan, I. S., Mohammed, O. F., Han, Y., & Bakr, O. M. (2019). Light-Induced Self-Assembly of Cubic CsPbBr₃ Perovskite Nanocrystals into Nanowires. Chemistry of Materials, 31(17), 6642-6649. https://doi.org/10.1021/acs.chemmater.9b00680

@article{d10777eec1664df780c0441fd455e89d,

title = "Light-Induced Self-Assembly of Cubic CsPbBr3 Perovskite Nanocrystals into Nanowires",

abstract = "The rapid development of halide perovskite synthesis offers the opportunity to fabricate high-quality perovskite nanocrystals (NCs), whose structural uniformity can lead to assembled supra-structures with improved device performance and novel collective properties. Light is known to significantly affect the structure and properties of halide perovskites and plays a crucial role in the growth and assembly of their crystals. Nevertheless, the light-induced growth mechanisms of perovskite NCs are not yet clearly understood. In this work, we performed a systematic study of the visible-light-induced template-free synthesis of CsPbBr3 nanowires (NWs) generated through self-assembly of cubic (in phase and close to cubic morphology) NCs. Using atomic-resolution electron microscopy, we visualized the cubic-to-orthorhombic phase transition in NCs and the interface between coalesced NCs. Remarkably, the images of the interface revealed the coexistence of CsBr and PbBr2 surface terminations in halide perovskites. Our results shed light on the mechanism underlying the observed anisotropic assembly of halide perovskites and elucidate the vital role of light illumination during this process. More importantly, as an elegant and promising green-chemistry approach, light-induced self-assembly represents a rational method for designing perovskites.",

author = "Jiakai Liu and Kepeng Song and Yongwoo Shin and Xin Liu and Jie Chen and Yao, \{Ke Xin\} and Jun Pan and Chen Yang and Jun Yin and Xu, \{Liang Jin\} and Haoze Yang and El-Zohry, \{Ahmed M.\} and Bin Xin and Somak Mitra and Hedhili, \{Mohamed Nejib\} and Roqan, \{Iman S.\} and Mohammed, \{Omar F.\} and Yu Han and Bakr, \{Osman M.\}",

note = "Publisher Copyright: {\textcopyright} 2019 American Chemical Society.",

year = "2019",

month = sep,

day = "10",

doi = "10.1021/acs.chemmater.9b00680",

language = "English",

volume = "31",

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Liu, J, Song, K, Shin, Y, Liu, X, Chen, J, Yao, KX, Pan, J, Yang, C, Yin, J, Xu, LJ, Yang, H, El-Zohry, AM, Xin, B, Mitra, S, Hedhili, MN, Roqan, IS, Mohammed, OF, Han, Y & Bakr, OM 2019, 'Light-Induced Self-Assembly of Cubic CsPbBr₃ Perovskite Nanocrystals into Nanowires', Chemistry of Materials, vol. 31, no. 17, pp. 6642-6649. https://doi.org/10.1021/acs.chemmater.9b00680

TY - JOUR

T1 - Light-Induced Self-Assembly of Cubic CsPbBr3 Perovskite Nanocrystals into Nanowires

AU - Liu, Jiakai

AU - Song, Kepeng

AU - Shin, Yongwoo

AU - Liu, Xin

AU - Chen, Jie

AU - Yao, Ke Xin

AU - Pan, Jun

AU - Yang, Chen

AU - Yin, Jun

AU - Xu, Liang Jin

AU - Yang, Haoze

AU - El-Zohry, Ahmed M.

AU - Xin, Bin

AU - Mitra, Somak

AU - Hedhili, Mohamed Nejib

AU - Roqan, Iman S.

AU - Mohammed, Omar F.

AU - Han, Yu

AU - Bakr, Osman M.

PY - 2019/9/10

Y1 - 2019/9/10

N2 - The rapid development of halide perovskite synthesis offers the opportunity to fabricate high-quality perovskite nanocrystals (NCs), whose structural uniformity can lead to assembled supra-structures with improved device performance and novel collective properties. Light is known to significantly affect the structure and properties of halide perovskites and plays a crucial role in the growth and assembly of their crystals. Nevertheless, the light-induced growth mechanisms of perovskite NCs are not yet clearly understood. In this work, we performed a systematic study of the visible-light-induced template-free synthesis of CsPbBr3 nanowires (NWs) generated through self-assembly of cubic (in phase and close to cubic morphology) NCs. Using atomic-resolution electron microscopy, we visualized the cubic-to-orthorhombic phase transition in NCs and the interface between coalesced NCs. Remarkably, the images of the interface revealed the coexistence of CsBr and PbBr2 surface terminations in halide perovskites. Our results shed light on the mechanism underlying the observed anisotropic assembly of halide perovskites and elucidate the vital role of light illumination during this process. More importantly, as an elegant and promising green-chemistry approach, light-induced self-assembly represents a rational method for designing perovskites.

AB - The rapid development of halide perovskite synthesis offers the opportunity to fabricate high-quality perovskite nanocrystals (NCs), whose structural uniformity can lead to assembled supra-structures with improved device performance and novel collective properties. Light is known to significantly affect the structure and properties of halide perovskites and plays a crucial role in the growth and assembly of their crystals. Nevertheless, the light-induced growth mechanisms of perovskite NCs are not yet clearly understood. In this work, we performed a systematic study of the visible-light-induced template-free synthesis of CsPbBr3 nanowires (NWs) generated through self-assembly of cubic (in phase and close to cubic morphology) NCs. Using atomic-resolution electron microscopy, we visualized the cubic-to-orthorhombic phase transition in NCs and the interface between coalesced NCs. Remarkably, the images of the interface revealed the coexistence of CsBr and PbBr2 surface terminations in halide perovskites. Our results shed light on the mechanism underlying the observed anisotropic assembly of halide perovskites and elucidate the vital role of light illumination during this process. More importantly, as an elegant and promising green-chemistry approach, light-induced self-assembly represents a rational method for designing perovskites.

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DO - 10.1021/acs.chemmater.9b00680

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SN - 0897-4756

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