The Photochemical Stability of PbI2 and PbBr2: Optical and XPS and DFT Studies
Электронный научный архив УРФУ
Информация об архиве | Просмотр оригинала| Поле | Значение | |
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The Photochemical Stability of PbI2 and PbBr2: Optical and XPS and DFT Studies
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| Автор |
Zhidkov, I. S.
Akbulatov, A. F. Poteryaev, A. I. Kukharenko, A. I. Rasmetyeva, A. V. Frolova, L. A. Troshin, P. A. Kurmaev, E. Z. |
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| Тематика |
DFT
HYBRID PEROVSKITE LEAD BROMIDE STABILITY XPS |
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| Описание |
We investigated the photochemical stability of PbX2 (X = I and Br) halides by optical and X-ray photoelectron spectroscopy (XPS). The optical absorbance displayed a strong reduction for PbI2 with light soaking and permanent behavior for PbBr2. The XPS survey spectra showed a sharp drop in the I:Pb ratio for PbI2 from 1.63 to 1.14 with exposure time from 0 to 1000 h while for PbBr2, it remains practically unchanged (1.59–1.55). The measurements of the XPS Pb 4f and Pb 5d spectra have shown the partial photolysis of PbI2 with the release of metallic lead whereas PbBr2 demonstrated remarkable photochemical stability. According to the density functional theory (DFT), calculations of the metal and iodide vacancy formation energies for PbBr2 are higher than for PbI2 which confirms the better stability to light soaking. The high photochemical stability of PbBr2 means that it can be used as excess under MAPbBr3 perovskite synthesis to improve not only the power conversion efficiency but also stability to light soaking. © 2023 by the authors.
Russian Foundation for Basic Research, РФФИ: 21-52-52002; Ministry of Education and Science of the Russian Federation, Minobrnauka: AAAA-A18-118020190098-5, FEUZ-2023-0013; Fédération pour la Recherche sur le Cerveau, FRC: 0089-2019-0010/AAAA-A19-119071190044-3 This work was supported by the Ministry of Science and Higher Education of the Russian Federation under the theme “Electron” No. AAAA-A18-118020190098-5 and Project FEUZ-2023-0013. The XPS measurements were supported by the Russian Foundation for Basic Research (Project No. 21-52-52002). Sample preparation was supported at FRC PCP MC RAS by the Ministry of Science and Higher Education of the Russian Federation (Project No. 0089-2019-0010/AAAA-A19-119071190044-3). |
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| Дата |
2024-04-05T16:20:59Z
2024-04-05T16:20:59Z 2023 |
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| Тип |
Article
Journal article (info:eu-repo/semantics/article) |info:eu-repo/semantics/publishedVersion |
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| Идентификатор |
Zhidkov , IS, Akbulatov, AF, Poteryaev , AI, Kukharenko , AI, Rasmetyeva , AV, Frolova, LA, Troshin, PA & Kurmaev, EZ 2023, 'The Photochemical Stability of PbI2 and PbBr2: Optical and XPS and DFT Studies', Coatings, Том. 13, № 4, 784. https://doi.org/10.3390/coatings13040784
Zhidkov , I. S., Akbulatov, A. F., Poteryaev , A. I., Kukharenko , A. I., Rasmetyeva , A. V., Frolova, L. A., Troshin, P. A., & Kurmaev, E. Z. (2023). The Photochemical Stability of PbI2 and PbBr2: Optical and XPS and DFT Studies. Coatings, 13(4), [784]. https://doi.org/10.3390/coatings13040784 2079-6412 Final All Open Access, Gold https://www.scopus.com/inward/record.uri?eid=2-s2.0-85156109991&doi=10.3390%2fcoatings13040784&partnerID=40&md5=7b8d48fcde540399cd0cca2305f1ae6d https://www.mdpi.com/2079-6412/13/4/784/pdf?version=1681816763 http://elar.urfu.ru/handle/10995/130449 10.3390/coatings13040784 85156109991 000979013100001 |
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en
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| Права |
Open access (info:eu-repo/semantics/openAccess)
cc-by https://creativecommons.org/licenses/by/4.0/ |
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application/pdf
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MDPI
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Coatings
Coatings |
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