Revealing the stoichiometric tolerance of lead trihalide perovskite thin films
The relationship between the chemical composition of lead halide perovskite materials and their crystal and electronic structure is not yet sufficiently understood, despite its fundamental importance. Here, we determine the crystal and electronic structure of cesium lead bromide (CsPbBr<sub>3&...
| Asıl Yazarlar: | , , , , , , |
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| Materyal Türü: | Journal article |
| Dil: | English |
| Baskı/Yayın Bilgisi: |
American Chemical Society
2019
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| _version_ | 1826313006805417984 |
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| author | Ramadan, AJ Ralaiarisoa, M Zu, F Rochford, LA Wenger, B Koch, N Snaith, HJ |
| author_facet | Ramadan, AJ Ralaiarisoa, M Zu, F Rochford, LA Wenger, B Koch, N Snaith, HJ |
| author_sort | Ramadan, AJ |
| collection | OXFORD |
| description | The relationship between the chemical composition of lead halide perovskite materials and their crystal and electronic structure is not yet sufficiently understood, despite its fundamental importance. Here, we determine the crystal and electronic structure of cesium lead bromide (CsPbBr<sub>3</sub>) while deliberately varying the cesium content. At substoichiometric concentrations of cesium, there are large variations in the frontier electronic structure of CsPbBr<sub>3</sub> with only small variations in Cs content. We observe a critical point after which large variations in the chemical composition of CsPbBr<sub>3</sub> result in comparably small changes in valence and conduction band energies. This behavior is starkly different from that of traditional semiconductors, such as InGaAs and GaInP, and demonstrates an impressive energetic tolerance of CsPbBr<sub>3</sub> to large changes in its stoichiometry. This observation helps us to understand why a broad range of relatively uncontrolled, simple processing methodologies can deliver highly functional metal halide perovskite thin films. |
| first_indexed | 2024-03-07T04:32:28Z |
| format | Journal article |
| id | oxford-uuid:cec78a71-bf90-4182-b136-612cd888dadd |
| institution | University of Oxford |
| language | English |
| last_indexed | 2024-09-25T04:04:08Z |
| publishDate | 2019 |
| publisher | American Chemical Society |
| record_format | dspace |
| spelling | oxford-uuid:cec78a71-bf90-4182-b136-612cd888dadd2024-05-13T14:35:14ZRevealing the stoichiometric tolerance of lead trihalide perovskite thin filmsJournal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:cec78a71-bf90-4182-b136-612cd888daddEnglishSymplectic Elements at OxfordAmerican Chemical Society2019Ramadan, AJRalaiarisoa, MZu, FRochford, LAWenger, BKoch, NSnaith, HJThe relationship between the chemical composition of lead halide perovskite materials and their crystal and electronic structure is not yet sufficiently understood, despite its fundamental importance. Here, we determine the crystal and electronic structure of cesium lead bromide (CsPbBr<sub>3</sub>) while deliberately varying the cesium content. At substoichiometric concentrations of cesium, there are large variations in the frontier electronic structure of CsPbBr<sub>3</sub> with only small variations in Cs content. We observe a critical point after which large variations in the chemical composition of CsPbBr<sub>3</sub> result in comparably small changes in valence and conduction band energies. This behavior is starkly different from that of traditional semiconductors, such as InGaAs and GaInP, and demonstrates an impressive energetic tolerance of CsPbBr<sub>3</sub> to large changes in its stoichiometry. This observation helps us to understand why a broad range of relatively uncontrolled, simple processing methodologies can deliver highly functional metal halide perovskite thin films. |
| spellingShingle | Ramadan, AJ Ralaiarisoa, M Zu, F Rochford, LA Wenger, B Koch, N Snaith, HJ Revealing the stoichiometric tolerance of lead trihalide perovskite thin films |
| title | Revealing the stoichiometric tolerance of lead trihalide perovskite thin films |
| title_full | Revealing the stoichiometric tolerance of lead trihalide perovskite thin films |
| title_fullStr | Revealing the stoichiometric tolerance of lead trihalide perovskite thin films |
| title_full_unstemmed | Revealing the stoichiometric tolerance of lead trihalide perovskite thin films |
| title_short | Revealing the stoichiometric tolerance of lead trihalide perovskite thin films |
| title_sort | revealing the stoichiometric tolerance of lead trihalide perovskite thin films |
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