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Direct Observation of Size-Dependent Phase Transition in Methylammonium Lead Bromide Perovskite Microcrystals and Nanocrystals

He, Yanmei LU ; Zheng, Kaibo LU ; Henry, Paul F. LU ; Pullerits, Tönu LU and Chen, Junsheng LU (2022) In ACS Omega 7(44). p.39970-39974
Abstract

Methylammonium (MA) lead halide perovskites have been widely studied as active materials for advanced optoelectronics. As crystalline semiconductor materials, their properties are strongly affected by their crystal structure. Depending on their applications, the size of MA lead halide perovskite crystals varies by several orders of magnitude. The particle size can lead to different structural phase transitions and optoelectronic properties. Herein, we investigate the size effect for phase transition of MA lead bromide (MAPbBr3) by comparing the temperature-dependent neutron powder diffraction patterns of microcrystals and nanocrystals. The orthorhombic-to-tetragonal phase transition occurs in MAPbBr3microcrystals... (More)

Methylammonium (MA) lead halide perovskites have been widely studied as active materials for advanced optoelectronics. As crystalline semiconductor materials, their properties are strongly affected by their crystal structure. Depending on their applications, the size of MA lead halide perovskite crystals varies by several orders of magnitude. The particle size can lead to different structural phase transitions and optoelectronic properties. Herein, we investigate the size effect for phase transition of MA lead bromide (MAPbBr3) by comparing the temperature-dependent neutron powder diffraction patterns of microcrystals and nanocrystals. The orthorhombic-to-tetragonal phase transition occurs in MAPbBr3microcrystals within the temperature range from 100 to 310 K. However, the phase transition is absent in nanocrystals in this temperature range. In this work, we offer a persuasive and direct evidence of the relationship between the particle size and the phase transition in perovskite crystals.

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author
; ; ; and
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
ACS Omega
volume
7
issue
44
pages
5 pages
publisher
The American Chemical Society (ACS)
external identifiers
  • scopus:85141367246
  • pmid:36385807
ISSN
2470-1343
DOI
10.1021/acsomega.2c04503
language
English
LU publication?
yes
id
d5e44168-dffe-48d1-aab9-87786744d80d
date added to LUP
2022-12-05 15:53:27
date last changed
2024-12-14 17:15:38
@article{d5e44168-dffe-48d1-aab9-87786744d80d,
  abstract     = {{<p>Methylammonium (MA) lead halide perovskites have been widely studied as active materials for advanced optoelectronics. As crystalline semiconductor materials, their properties are strongly affected by their crystal structure. Depending on their applications, the size of MA lead halide perovskite crystals varies by several orders of magnitude. The particle size can lead to different structural phase transitions and optoelectronic properties. Herein, we investigate the size effect for phase transition of MA lead bromide (MAPbBr<sub>3</sub>) by comparing the temperature-dependent neutron powder diffraction patterns of microcrystals and nanocrystals. The orthorhombic-to-tetragonal phase transition occurs in MAPbBr<sub>3</sub>microcrystals within the temperature range from 100 to 310 K. However, the phase transition is absent in nanocrystals in this temperature range. In this work, we offer a persuasive and direct evidence of the relationship between the particle size and the phase transition in perovskite crystals.</p>}},
  author       = {{He, Yanmei and Zheng, Kaibo and Henry, Paul F. and Pullerits, Tönu and Chen, Junsheng}},
  issn         = {{2470-1343}},
  language     = {{eng}},
  number       = {{44}},
  pages        = {{39970--39974}},
  publisher    = {{The American Chemical Society (ACS)}},
  series       = {{ACS Omega}},
  title        = {{Direct Observation of Size-Dependent Phase Transition in Methylammonium Lead Bromide Perovskite Microcrystals and Nanocrystals}},
  url          = {{http://dx.doi.org/10.1021/acsomega.2c04503}},
  doi          = {{10.1021/acsomega.2c04503}},
  volume       = {{7}},
  year         = {{2022}},
}