Ferroelastic Domain-Induced Electronic Modulation in Halide Perovskites

Ganesh Narasimha; Maryam Bari; Benjamin J. Lawrie; Ilia N. Ivanov; Marti Checa; Sumner B. Harris; Zuo Guang Ye; Rama Vasudevan; Yongtao Liu

doi:10.1021/acsami.5c06966

Ferroelastic Domain-Induced Electronic Modulation in Halide Perovskites

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

Abstract

Lead halide perovskites have emerged as promising materials for optoelectronic applications due to their exceptional properties. In the all-inorganic CsPbBr₃perovskites, ferroelastic domains formed during phase transitions enhance bulk transport and emissive efficiency. However, the microscopic mechanisms governing carrier dynamics remain poorly understood. In this study, we employ cathodoluminescence (CL) and micro-Raman spectroscopy to image and investigate the electronic properties of the ferroelastic domain walls in CsPbBr₃single crystals. CL measurements reveal a reduced emissive yield and a slight redshift in emission at the domain walls. Further, micro-Raman studies provide spatially resolved mapping of vibrational modes, exhibiting second-order phonon modes localized at the domain boundaries. Our findings suggest that electron–phonon coupling at the twin domain walls plays a critical role in facilitating efficient charge separation, thereby improving the optoelectronic performance of the CsPbBr₃perovskites.

Original language	English
Pages (from-to)	54148-54156
Number of pages	9
Journal	ACS Applied Materials and Interfaces
Volume	17
Issue number	38
DOIs	https://doi.org/10.1021/acsami.5c06966
State	Published - Sep 24 2025

Funding

This work was supported by the Center for Nanophase Materials Sciences (CNMS), which is a U.S. Department of Energy, Office of Science User Facility at Oak Ridge National Laboratory, the Natural Sciences and Engineering Research Council of Canada (NSERC DG, RGPIN-2023-04416), and the U.S. Office of Naval Research (ONR grant N00014-21-1-2085). The authors acknowledge useful discussion with Roger Proksch (Asylum Research) regarding the VERO PFM results. The authors also thank Vidhi Chauhan for help in drawing the crystal structure.

Keywords

cathodoluminescence
domain walls
electron−phonon coupling
ferroelastic
halide perovskites

Access to Document

10.1021/acsami.5c06966

Cite this

@article{6642643b7c5449d29a80ad89b24b2474,

title = "Ferroelastic Domain-Induced Electronic Modulation in Halide Perovskites",

abstract = "Lead halide perovskites have emerged as promising materials for optoelectronic applications due to their exceptional properties. In the all-inorganic CsPbBr3perovskites, ferroelastic domains formed during phase transitions enhance bulk transport and emissive efficiency. However, the microscopic mechanisms governing carrier dynamics remain poorly understood. In this study, we employ cathodoluminescence (CL) and micro-Raman spectroscopy to image and investigate the electronic properties of the ferroelastic domain walls in CsPbBr3single crystals. CL measurements reveal a reduced emissive yield and a slight redshift in emission at the domain walls. Further, micro-Raman studies provide spatially resolved mapping of vibrational modes, exhibiting second-order phonon modes localized at the domain boundaries. Our findings suggest that electron–phonon coupling at the twin domain walls plays a critical role in facilitating efficient charge separation, thereby improving the optoelectronic performance of the CsPbBr3perovskites.",

keywords = "cathodoluminescence, domain walls, electron−phonon coupling, ferroelastic, halide perovskites",

author = "Ganesh Narasimha and Maryam Bari and Lawrie, \{Benjamin J.\} and Ivanov, \{Ilia N.\} and Marti Checa and Harris, \{Sumner B.\} and Ye, \{Zuo Guang\} and Rama Vasudevan and Yongtao Liu",

note = "Publisher Copyright: {\textcopyright} 2025 American Chemical Society",

year = "2025",

month = sep,

day = "24",

doi = "10.1021/acsami.5c06966",

language = "English",

volume = "17",

pages = "54148--54156",

journal = "ACS Applied Materials and Interfaces",

issn = "1944-8244",

publisher = "American Chemical Society",

number = "38",

}

TY - JOUR

T1 - Ferroelastic Domain-Induced Electronic Modulation in Halide Perovskites

AU - Narasimha, Ganesh

AU - Bari, Maryam

AU - Lawrie, Benjamin J.

AU - Ivanov, Ilia N.

AU - Checa, Marti

AU - Harris, Sumner B.

AU - Ye, Zuo Guang

AU - Vasudevan, Rama

AU - Liu, Yongtao

PY - 2025/9/24

Y1 - 2025/9/24

N2 - Lead halide perovskites have emerged as promising materials for optoelectronic applications due to their exceptional properties. In the all-inorganic CsPbBr3perovskites, ferroelastic domains formed during phase transitions enhance bulk transport and emissive efficiency. However, the microscopic mechanisms governing carrier dynamics remain poorly understood. In this study, we employ cathodoluminescence (CL) and micro-Raman spectroscopy to image and investigate the electronic properties of the ferroelastic domain walls in CsPbBr3single crystals. CL measurements reveal a reduced emissive yield and a slight redshift in emission at the domain walls. Further, micro-Raman studies provide spatially resolved mapping of vibrational modes, exhibiting second-order phonon modes localized at the domain boundaries. Our findings suggest that electron–phonon coupling at the twin domain walls plays a critical role in facilitating efficient charge separation, thereby improving the optoelectronic performance of the CsPbBr3perovskites.

AB - Lead halide perovskites have emerged as promising materials for optoelectronic applications due to their exceptional properties. In the all-inorganic CsPbBr3perovskites, ferroelastic domains formed during phase transitions enhance bulk transport and emissive efficiency. However, the microscopic mechanisms governing carrier dynamics remain poorly understood. In this study, we employ cathodoluminescence (CL) and micro-Raman spectroscopy to image and investigate the electronic properties of the ferroelastic domain walls in CsPbBr3single crystals. CL measurements reveal a reduced emissive yield and a slight redshift in emission at the domain walls. Further, micro-Raman studies provide spatially resolved mapping of vibrational modes, exhibiting second-order phonon modes localized at the domain boundaries. Our findings suggest that electron–phonon coupling at the twin domain walls plays a critical role in facilitating efficient charge separation, thereby improving the optoelectronic performance of the CsPbBr3perovskites.

KW - cathodoluminescence

KW - domain walls

KW - electron−phonon coupling

KW - ferroelastic

KW - halide perovskites

UR - https://www.scopus.com/pages/publications/105016905496

U2 - 10.1021/acsami.5c06966

DO - 10.1021/acsami.5c06966

M3 - Article

C2 - 40954137

AN - SCOPUS:105016905496

SN - 1944-8244

VL - 17

SP - 54148

EP - 54156

JO - ACS Applied Materials and Interfaces

JF - ACS Applied Materials and Interfaces

IS - 38

ER -

Ferroelastic Domain-Induced Electronic Modulation in Halide Perovskites

Abstract

Funding

Keywords

Access to Document

Other files and links

Fingerprint

Cite this