Strain mediated bandgap reduction, light spectrum broadening, and carrier mobility enhancement of methylammonium lead/tin iodide perovskites
Article
Article Title | Strain mediated bandgap reduction, light spectrum broadening, and carrier mobility enhancement of methylammonium lead/tin iodide perovskites |
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ERA Journal ID | 3913 |
Article Category | Article |
Authors | Jiao, Yalong (Author), Ma, Fengxian (Author), Wang, Hongxia (Author), Bell, John (Author) and Du, Aijun (Author) |
Journal Title | Particle and Particle Systems Characterization |
Journal Citation | 34 (4) |
Article Number | 1600288 |
Number of Pages | 5 |
Year | 2017 |
Place of Publication | Germany |
ISSN | 0934-0866 |
1521-4117 | |
Digital Object Identifier (DOI) | https://doi.org/10.1002/ppsc.201600288 |
Web Address (URL) | https://onlinelibrary.wiley.com/doi/epdf/10.1002/ppsc.201600288 |
Abstract | Density functional theory calculations are performed to study the electronic and optical properties of methylammonium lead/tin iodide perovskites under hydrostatic strain. It is found that the bandgap is significantly reduced to only 80/14 meV in lead/tin iodide perovskites under a moderate −6%/−4% strain. Such bandgap narrowing consequently induces the redshift of light absorption spectrum of the perovskite material by extending the onset light absorption edge by 200 meV. Additionally, applying external strain is also found to lighten the electron effective mass for CH3NH3PbI3/CH3NH3SnI3, thus enhancing the carrier mobility which benefits the collection of photogenerated charge carriers. |
Keywords | band structure; DFT calculations; light absorption; perovskites; strain |
ANZSRC Field of Research 2020 | 400499. Chemical engineering not elsewhere classified |
Public Notes | Files associated with this item cannot be displayed due to copyright restrictions. |
Byline Affiliations | Queensland University of Technology |
Institution of Origin | University of Southern Queensland |
https://research.usq.edu.au/item/q5x31/strain-mediated-bandgap-reduction-light-spectrum-broadening-and-carrier-mobility-enhancement-of-methylammonium-lead-tin-iodide-perovskites
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