Cargando…

Unusual Temperature Dependence of Bandgap in 2D Inorganic Lead‐Halide Perovskite Nanoplatelets

Understanding the origin of temperature‐dependent bandgap in inorganic lead‐halide perovskites is essential and important for their applications in photovoltaics and optoelectronics. Herein, it is found that the temperature dependence of bandgap in CsPbBr(3) perovskites is variable with material dim...

Descripción completa

Detalles Bibliográficos
Autores principales: Yu, Shaohua, Xu, Jin, Shang, Xiaoying, Ma, En, Lin, Fulin, Zheng, Wei, Tu, Datao, Li, Renfu, Chen, Xueyuan
Formato: Online Artículo Texto
Lenguaje:English
Publicado: John Wiley and Sons Inc. 2021
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8498867/
https://www.ncbi.nlm.nih.gov/pubmed/34382362
http://dx.doi.org/10.1002/advs.202100084
_version_ 1784580262221316096
author Yu, Shaohua
Xu, Jin
Shang, Xiaoying
Ma, En
Lin, Fulin
Zheng, Wei
Tu, Datao
Li, Renfu
Chen, Xueyuan
author_facet Yu, Shaohua
Xu, Jin
Shang, Xiaoying
Ma, En
Lin, Fulin
Zheng, Wei
Tu, Datao
Li, Renfu
Chen, Xueyuan
author_sort Yu, Shaohua
collection PubMed
description Understanding the origin of temperature‐dependent bandgap in inorganic lead‐halide perovskites is essential and important for their applications in photovoltaics and optoelectronics. Herein, it is found that the temperature dependence of bandgap in CsPbBr(3) perovskites is variable with material dimensionality. In contrast to the monotonous redshift ordinarily observed in bulk‐like CsPbBr(3) nanocrystals (NCs), the bandgap of 2D CsPbBr(3) nanoplatelets (NPLs) exhibits an initial blueshift then redshift trend with decreasing temperature (290–10 K). The Bose–Einstein two‐oscillator modeling manifests that the blueshift‐redshift crossover of bandgap in the NPLs is attributed to the significantly larger weight of contribution from electron‐optical phonon interaction to the bandgap renormalization in the NPLs than in the NCs. These new findings may gain deep insights into the origin of bandgap shift with temperature for both fundamentals and applications of perovskite semiconductor materials.
format Online
Article
Text
id pubmed-8498867
institution National Center for Biotechnology Information
language English
publishDate 2021
publisher John Wiley and Sons Inc.
record_format MEDLINE/PubMed
spelling pubmed-84988672021-10-12 Unusual Temperature Dependence of Bandgap in 2D Inorganic Lead‐Halide Perovskite Nanoplatelets Yu, Shaohua Xu, Jin Shang, Xiaoying Ma, En Lin, Fulin Zheng, Wei Tu, Datao Li, Renfu Chen, Xueyuan Adv Sci (Weinh) Research Articles Understanding the origin of temperature‐dependent bandgap in inorganic lead‐halide perovskites is essential and important for their applications in photovoltaics and optoelectronics. Herein, it is found that the temperature dependence of bandgap in CsPbBr(3) perovskites is variable with material dimensionality. In contrast to the monotonous redshift ordinarily observed in bulk‐like CsPbBr(3) nanocrystals (NCs), the bandgap of 2D CsPbBr(3) nanoplatelets (NPLs) exhibits an initial blueshift then redshift trend with decreasing temperature (290–10 K). The Bose–Einstein two‐oscillator modeling manifests that the blueshift‐redshift crossover of bandgap in the NPLs is attributed to the significantly larger weight of contribution from electron‐optical phonon interaction to the bandgap renormalization in the NPLs than in the NCs. These new findings may gain deep insights into the origin of bandgap shift with temperature for both fundamentals and applications of perovskite semiconductor materials. John Wiley and Sons Inc. 2021-08-11 /pmc/articles/PMC8498867/ /pubmed/34382362 http://dx.doi.org/10.1002/advs.202100084 Text en © 2021 The Authors. Advanced Science published by Wiley‐VCH GmbH https://creativecommons.org/licenses/by/4.0/This is an open access article under the terms of the http://creativecommons.org/licenses/by/4.0/ (https://creativecommons.org/licenses/by/4.0/) License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.
spellingShingle Research Articles
Yu, Shaohua
Xu, Jin
Shang, Xiaoying
Ma, En
Lin, Fulin
Zheng, Wei
Tu, Datao
Li, Renfu
Chen, Xueyuan
Unusual Temperature Dependence of Bandgap in 2D Inorganic Lead‐Halide Perovskite Nanoplatelets
title Unusual Temperature Dependence of Bandgap in 2D Inorganic Lead‐Halide Perovskite Nanoplatelets
title_full Unusual Temperature Dependence of Bandgap in 2D Inorganic Lead‐Halide Perovskite Nanoplatelets
title_fullStr Unusual Temperature Dependence of Bandgap in 2D Inorganic Lead‐Halide Perovskite Nanoplatelets
title_full_unstemmed Unusual Temperature Dependence of Bandgap in 2D Inorganic Lead‐Halide Perovskite Nanoplatelets
title_short Unusual Temperature Dependence of Bandgap in 2D Inorganic Lead‐Halide Perovskite Nanoplatelets
title_sort unusual temperature dependence of bandgap in 2d inorganic lead‐halide perovskite nanoplatelets
topic Research Articles
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8498867/
https://www.ncbi.nlm.nih.gov/pubmed/34382362
http://dx.doi.org/10.1002/advs.202100084
work_keys_str_mv AT yushaohua unusualtemperaturedependenceofbandgapin2dinorganicleadhalideperovskitenanoplatelets
AT xujin unusualtemperaturedependenceofbandgapin2dinorganicleadhalideperovskitenanoplatelets
AT shangxiaoying unusualtemperaturedependenceofbandgapin2dinorganicleadhalideperovskitenanoplatelets
AT maen unusualtemperaturedependenceofbandgapin2dinorganicleadhalideperovskitenanoplatelets
AT linfulin unusualtemperaturedependenceofbandgapin2dinorganicleadhalideperovskitenanoplatelets
AT zhengwei unusualtemperaturedependenceofbandgapin2dinorganicleadhalideperovskitenanoplatelets
AT tudatao unusualtemperaturedependenceofbandgapin2dinorganicleadhalideperovskitenanoplatelets
AT lirenfu unusualtemperaturedependenceofbandgapin2dinorganicleadhalideperovskitenanoplatelets
AT chenxueyuan unusualtemperaturedependenceofbandgapin2dinorganicleadhalideperovskitenanoplatelets