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- Benjamin J. Foley
- University of Virginia 1 Department of Chemical Engineering, , Charlottesville, Virginia 22904, USA
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- Daniel L. Marlowe
- University of Virginia 1 Department of Chemical Engineering, , Charlottesville, Virginia 22904, USA
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- Keye Sun
- University of Virginia 2 Department of Electrical and Computer Engineering, , Charlottesville, Virginia 22904, USA
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- Wissam A. Saidi
- University of Pittsburgh 3 Department of Mechanical Engineering and Materials Science, , Pittsburgh, Pennsylvania 15261, USA
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- Louis Scudiero
- Washington State University 4 Chemistry Department and Materials Science and Engineering Program, , Pullman, Washington 99164, USA
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- Mool C. Gupta
- University of Virginia 2 Department of Electrical and Computer Engineering, , Charlottesville, Virginia 22904, USA
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- Joshua J. Choi
- University of Virginia 1 Department of Chemical Engineering, , Charlottesville, Virginia 22904, USA
書誌事項
- 公開日
- 2015-06-15
- DOI
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- 10.1063/1.4922804
- 公開者
- AIP Publishing
この論文をさがす
説明
<jats:p>Temperature dependent energy levels of methylammonium lead iodide are investigated using a combination of ultraviolet photoemission spectroscopy and optical spectroscopy. Our results show that the valence band maximum and conduction band minimum shift down in energy by 110 meV and 77 meV as temperature increases from 28 °C to 85 °C. Density functional theory calculations using slab structures show that the decreased orbital splitting due to thermal expansion is a major contribution to the experimentally observed shift in energy levels. Our results have implications for solar cell performance under operating conditions with continued sunlight exposure and increased temperature.</jats:p>
収録刊行物
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- Applied Physics Letters
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Applied Physics Letters 106 (24), 243904-, 2015-06-15
AIP Publishing
