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Title: Unusual pressure-induced electronic structure evolution in organometal halide perovskite predicted from first-principles

Abstract

Pressure has been demonstrated to be an effective parameter to alter the atomic and electronic structures of materials. By using the first-principles calculations based on density functional theory (DFT), we systematically investigated the changes in the atomic and electronic structures of the cubic MAPbI 3 phase under pressures. It is found that the band gap of the compressed cubic MAPbI 3 structure exhibits a remarkable redshift to 1.114/1.380 eV in DFT/HSE-SOC calculation under a mild pressure of 2.772 GPa, and subsequently shows a widening at higher pressures until ~20 GPa. As the pressure further increases, the band gap closes at ~80 GPa. Detailed structural and electronic characteristic analyses indicate that the band gap of the cubic MAPbI 3 structure is determined by two competing effects: the lattice contraction decreases its band gap while the PbI 6 octahedral tilting increases it. Given that, pressure can be a powerful tool to help understanding the optoelectronic properties of perovskite materials.

Authors:
ORCiD logo [1];  [1];  [1];  [1];  [2]
  1. Zhengzhou Univ. (China)
  2. Ames Lab., Ames, IA (United States)
Publication Date:
Research Org.:
Ames Lab., Ames, IA (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1492304
Alternate Identifier(s):
OSTI ID: 1547881
Report Number(s):
IS-J-9845
Journal ID: ISSN 1566-1199
Grant/Contract Number:  
11504332; 1521317008; AC02-07CH11358
Resource Type:
Accepted Manuscript
Journal Name:
Organic Electronics
Additional Journal Information:
Journal Volume: 67; Journal Issue: C; Journal ID: ISSN 1566-1199
Publisher:
Elsevier
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE

Citation Formats

Wang, Fei, Tan, Mengping, Li, Chong, Niu, Chunyao, and Zhao, Xin. Unusual pressure-induced electronic structure evolution in organometal halide perovskite predicted from first-principles. United States: N. p., 2019. Web. doi:10.1016/j.orgel.2019.01.003.
Wang, Fei, Tan, Mengping, Li, Chong, Niu, Chunyao, & Zhao, Xin. Unusual pressure-induced electronic structure evolution in organometal halide perovskite predicted from first-principles. United States. doi:10.1016/j.orgel.2019.01.003.
Wang, Fei, Tan, Mengping, Li, Chong, Niu, Chunyao, and Zhao, Xin. Sun . "Unusual pressure-induced electronic structure evolution in organometal halide perovskite predicted from first-principles". United States. doi:10.1016/j.orgel.2019.01.003.
@article{osti_1492304,
title = {Unusual pressure-induced electronic structure evolution in organometal halide perovskite predicted from first-principles},
author = {Wang, Fei and Tan, Mengping and Li, Chong and Niu, Chunyao and Zhao, Xin},
abstractNote = {Pressure has been demonstrated to be an effective parameter to alter the atomic and electronic structures of materials. By using the first-principles calculations based on density functional theory (DFT), we systematically investigated the changes in the atomic and electronic structures of the cubic MAPbI3 phase under pressures. It is found that the band gap of the compressed cubic MAPbI3 structure exhibits a remarkable redshift to 1.114/1.380 eV in DFT/HSE-SOC calculation under a mild pressure of 2.772 GPa, and subsequently shows a widening at higher pressures until ~20 GPa. As the pressure further increases, the band gap closes at ~80 GPa. Detailed structural and electronic characteristic analyses indicate that the band gap of the cubic MAPbI3 structure is determined by two competing effects: the lattice contraction decreases its band gap while the PbI6 octahedral tilting increases it. Given that, pressure can be a powerful tool to help understanding the optoelectronic properties of perovskite materials.},
doi = {10.1016/j.orgel.2019.01.003},
journal = {Organic Electronics},
number = C,
volume = 67,
place = {United States},
year = {2019},
month = {1}
}

Journal Article:
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This content will become publicly available on January 6, 2020
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