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

Journal Article · · Organic Electronics

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.

Research Organization:
Ames Lab., Ames, IA (United States)
Sponsoring Organization:
USDOE
Grant/Contract Number:
11504332; 1521317008; AC02-07CH11358
OSTI ID:
1492304
Alternate ID(s):
OSTI ID: 1547881
Report Number(s):
IS-J-9845
Journal Information:
Organic Electronics, Vol. 67, Issue C; ISSN 1566-1199
Publisher:
ElsevierCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 14 works
Citation information provided by
Web of Science

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Cited By (1)

Pressure responses of halide perovskites with various compositions, dimensionalities, and morphologies journal January 2020

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