Oxidative passivation of metal halide perovskites
Metal halide perovskites have demonstrated extraordinary potential as materials for next-generation optoelectronics including photovoltaics and light-emitting diodes. Nevertheless, our understanding of this material is still far from complete. One remaining puzzle is the phenomenon of perovskite “ph...
| Main Authors: | , , , , , |
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| Format: | Journal article |
| Language: | English |
| Published: |
Cell Press
2019
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| _version_ | 1826264281880985600 |
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| author | Godding, J Ramadan, A Lin, Y Schutt, K Snaith, H Wenger, B |
| author_facet | Godding, J Ramadan, A Lin, Y Schutt, K Snaith, H Wenger, B |
| author_sort | Godding, J |
| collection | OXFORD |
| description | Metal halide perovskites have demonstrated extraordinary potential as materials for next-generation optoelectronics including photovoltaics and light-emitting diodes. Nevertheless, our understanding of this material is still far from complete. One remaining puzzle is the phenomenon of perovskite “photo-brightening”: the increase in photoluminescence during exposure to light in an ambient atmosphere. Here, we propose a comprehensive mechanism for the reactivity of the archetypal perovskite, MAPbI3, in ambient conditions. We establish the formation of lead-oxygen bonds by hydrogen peroxide as the key factor leading to perovskite photo-brightening. We demonstrate that hydrogen peroxide can be applied directly as an effective “post-treatment” to emulate the process and substantially improve photoluminescence quantum efficiencies. Finally, we show that the treatment can be incorporated into photovoltaic devices to give a 50 mV increase in open-circuit voltage, delivering high 19.2% steady-state power conversion efficiencies for inverted perovskite solar cells of the mixed halide, mixed cation perovskite FA0.83Cs0.17Pb(I0.9Br0.1)3. |
| first_indexed | 2024-03-06T20:05:15Z |
| format | Journal article |
| id | oxford-uuid:28b30c66-b6b2-4e92-9750-331e6bfe57c5 |
| institution | University of Oxford |
| language | English |
| last_indexed | 2024-03-06T20:05:15Z |
| publishDate | 2019 |
| publisher | Cell Press |
| record_format | dspace |
| spelling | oxford-uuid:28b30c66-b6b2-4e92-9750-331e6bfe57c52022-03-26T12:14:30ZOxidative passivation of metal halide perovskitesJournal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:28b30c66-b6b2-4e92-9750-331e6bfe57c5EnglishSymplectic Elements at OxfordCell Press2019Godding, JRamadan, ALin, YSchutt, KSnaith, HWenger, BMetal halide perovskites have demonstrated extraordinary potential as materials for next-generation optoelectronics including photovoltaics and light-emitting diodes. Nevertheless, our understanding of this material is still far from complete. One remaining puzzle is the phenomenon of perovskite “photo-brightening”: the increase in photoluminescence during exposure to light in an ambient atmosphere. Here, we propose a comprehensive mechanism for the reactivity of the archetypal perovskite, MAPbI3, in ambient conditions. We establish the formation of lead-oxygen bonds by hydrogen peroxide as the key factor leading to perovskite photo-brightening. We demonstrate that hydrogen peroxide can be applied directly as an effective “post-treatment” to emulate the process and substantially improve photoluminescence quantum efficiencies. Finally, we show that the treatment can be incorporated into photovoltaic devices to give a 50 mV increase in open-circuit voltage, delivering high 19.2% steady-state power conversion efficiencies for inverted perovskite solar cells of the mixed halide, mixed cation perovskite FA0.83Cs0.17Pb(I0.9Br0.1)3. |
| spellingShingle | Godding, J Ramadan, A Lin, Y Schutt, K Snaith, H Wenger, B Oxidative passivation of metal halide perovskites |
| title | Oxidative passivation of metal halide perovskites |
| title_full | Oxidative passivation of metal halide perovskites |
| title_fullStr | Oxidative passivation of metal halide perovskites |
| title_full_unstemmed | Oxidative passivation of metal halide perovskites |
| title_short | Oxidative passivation of metal halide perovskites |
| title_sort | oxidative passivation of metal halide perovskites |
| work_keys_str_mv | AT goddingj oxidativepassivationofmetalhalideperovskites AT ramadana oxidativepassivationofmetalhalideperovskites AT liny oxidativepassivationofmetalhalideperovskites AT schuttk oxidativepassivationofmetalhalideperovskites AT snaithh oxidativepassivationofmetalhalideperovskites AT wengerb oxidativepassivationofmetalhalideperovskites |