Ambient condition retention of band-gap tuning in MAPbI3 induced by high pressure quenching

2018 ◽  
Vol 54 (94) ◽  
pp. 13212-13215 ◽  
Author(s):  
Sara Bonomi ◽  
Ilenia Tredici ◽  
Benedetta Albini ◽  
Pietro Galinetto ◽  
Aurora Rizzo ◽  
...  
Keyword(s):  
High Pressure ◽  
Band Gap ◽  
Ambient Condition ◽  
Pressure Release ◽  
Successful Approach ◽  
Band Gap Tuning ◽  
Pressure Quenching

In the present work, we show a successful approach to achieve stable structural and optical changes induced by pressure on bulk amounts of MAPI after pressure release.

scholarly journals Origin of pressure-induced band gap tuning in tin halide perovskites

2020 ◽  
Vol 1 (8) ◽  
pp. 2840-2845
Author(s):  
Mauro Coduri ◽  
Thomas B. Shiell ◽  
Timothy A. Strobel ◽  
Arup Mahata ◽  
Federico Cova ◽  
...  
Keyword(s):  
Phase Transition ◽  
High Pressure ◽  
Band Gap ◽  
Orthorhombic Phase ◽  
Blue Shift ◽  
Red Shift ◽  
Pressure Increase ◽  
Halide Perovskites ◽  
Band Gap Tuning ◽  
High Pressure Study

Structural and optical high-pressure study of FASnBr3 revealed a cubic to orthorhombic phase transition near 1.4 GPa accompanied by a huge band gap red-shift from 2.4 to 1.6 eV, which is followed by a blue-shift of ∼0.2 eV upon further pressure increase.

scholarly journals Crystal and electronic structure engineering of tin monoxide by external pressure

2021 ◽  
Author(s):  
Kun Li ◽  
Junjie Wang ◽  
Vladislav A. Blatov ◽  
Yutong Gong ◽  
Naoto Umezawa ◽  
...  
Keyword(s):  
Phase Transition ◽  
High Pressure ◽  
Band Gap ◽  
High Pressures ◽  
Low Pressure ◽  
Widespread Application ◽  
Space Group ◽  
Tin Monoxide ◽  
High Possibility ◽  
Pressure Phase

AbstractAlthough tin monoxide (SnO) is an interesting compound due to its p-type conductivity, a widespread application of SnO has been limited by its narrow band gap of 0.7 eV. In this work, we theoretically investigate the structural and electronic properties of several SnO phases under high pressures through employing van der Waals (vdW) functionals. Our calculations reveal that a metastable SnO (β-SnO), which possesses space group P21/c and a wide band gap of 1.9 eV, is more stable than α-SnO at pressures higher than 80 GPa. Moreover, a stable (space group P2/c) and a metastable (space group Pnma) phases of SnO appear at pressures higher than 120 GPa. Energy and topological analyses show that P2/c-SnO has a high possibility to directly transform to β-SnO at around 120 GPa. Our work also reveals that β-SnO is a necessary intermediate state between high-pressure phase Pnma-SnO and low-pressure phase α-SnO for the phase transition path Pnma-SnO →β-SnO → α-SnO. Two phase transition analyses indicate that there is a high possibility to synthesize β-SnO under high-pressure conditions and have it remain stable under normal pressure. Finally, our study reveals that the conductive property of β-SnO can be engineered in a low-pressure range (0–9 GPa) through a semiconductor-to-metal transition, while maintaining transparency in the visible light range.

scholarly journals Crystal‐size‐induced band gap tuning in perovskite films

2021 ◽  
Author(s):  
Amita Ummadisingu ◽  
Simone Meloni ◽  
Alessandro Mattoni ◽  
Wolfgang Tress ◽  
Michael Grätzel
Keyword(s):  
Band Gap ◽  
Crystal Size ◽  
Band Gap Tuning

Band gap tuning of new light emitting conjugated polymers

2003 ◽  
Vol 21 (1-3) ◽  
pp. 199-203 ◽  
Author(s):  
Do-Hoon Hwang ◽  
Nam Sung Cho ◽  
Byung-Jun Jung ◽  
Hong-Ku Shim ◽  
Jeong-Ik Lee ◽  
...  
Keyword(s):  
Conjugated Polymers ◽  
Band Gap ◽  
Light Emitting ◽  
Band Gap Tuning

Donor-Substituted Cyanoethynylethenes: π-Conjugation and Band-Gap Tuning in Strong Charge-Transfer Chromophores

2005 ◽  
Vol 11 (11) ◽  
pp. 3325-3341 ◽  
Author(s):  
Nicolle N. P. Moonen ◽  
William C. Pomerantz ◽  
Robin Gist ◽  
Corinne Boudon ◽  
Jean-Paul Gisselbrecht ◽  
...  
Keyword(s):  
Charge Transfer ◽  
Band Gap ◽  
Band Gap Tuning

scholarly journals Band gap tuning of lead-substituted BaSnO3 for visible light photocatalysis

2007 ◽  
Vol 90 (3) ◽  
pp. 034103 ◽  
Author(s):  
Pramod H. Borse ◽  
Upendra A. Joshi ◽  
Sang Min Ji ◽  
Jum Suk Jang ◽  
Jae Sung Lee ◽  
...  
Keyword(s):  
Visible Light ◽  
Band Gap ◽  
Visible Light Photocatalysis ◽  
Band Gap Tuning

Pre-Stressed Viscoelastic Composites: Effective Incremental Moduli and Band-Gap Tuning

2010 ◽  
Author(s):  
William J. Parnell ◽  
Theodore E. Simos ◽  
George Psihoyios ◽  
Ch. Tsitouras
Keyword(s):  
Band Gap ◽  
Viscoelastic Composites ◽  
Band Gap Tuning

High-pressure zinc oxide phase as visible-light-active photocatalyst with narrow band gap

2017 ◽  
Vol 5 (38) ◽  
pp. 20298-20303 ◽  
Author(s):  
Hadi Razavi-Khosroshahi ◽  
Kaveh Edalati ◽  
Ji Wu ◽  
Yuki Nakashima ◽  
Makoto Arita ◽  
...  
Keyword(s):  
High Pressure ◽  
Zinc Oxide ◽  
Visible Light ◽  
Band Gap ◽  
Narrow Band ◽  
Oxide Phase ◽  
Visible Light Active

High-pressure rocksalt ZnO with a band gap of 1.8 eV, which can absorb visible light.

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