Unveiling the influence of pH on the crystallization of hybrid perovskites, felivering low voltage loss photovoltaics
Impressive power conversion efficiencies coupled with the relative ease of fabrication have made perovskite solar cells a front runner for next-generation photovoltaics. Although perovskite films and optoelectronic devices have been widely studied, relatively little is known about the chemistry of t...
| Main Authors: | , , , , , , , , |
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| Format: | Journal article |
| Published: |
Cell Press
2017
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| _version_ | 1797065574636847104 |
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| author | Noel, N Congiu, M Ramadan, A Fearn, S McMeekin, D Patel, J Johnston, M Wenger, B Snaith, H |
| author_facet | Noel, N Congiu, M Ramadan, A Fearn, S McMeekin, D Patel, J Johnston, M Wenger, B Snaith, H |
| author_sort | Noel, N |
| collection | OXFORD |
| description | Impressive power conversion efficiencies coupled with the relative ease of fabrication have made perovskite solar cells a front runner for next-generation photovoltaics. Although perovskite films and optoelectronic devices have been widely studied, relatively little is known about the chemistry of the precursor solutions. Here, we present a study on the hydrolysis of N,N-dimethylformamide, correlating how pH changes related to its degradation affect the crystallization of MAPbI3xClx perovskite films. By careful manipulation of the pH, and the resulting colloid distribution in precursor solutions, we fabricate perovskite films with greatly improved crystallinity, which when incorporated into photovoltaic devices reproducibly yield efficiencies of over 18%. Extending this method to the mixed cation, mixed halide perovskite FA0.83MA0.17Pb(I0.83Br0.17)3, we obtain power conversion efficiencies of up to 19.9% and open-circuit voltages of 1.21 V for a material with a bandgap of 1.57 eV, achieving the lowest yet reported loss in potential from bandgap to a VOC of only 360 mV. |
| first_indexed | 2024-03-06T21:30:34Z |
| format | Journal article |
| id | oxford-uuid:448e22b2-c6ce-4a12-a76d-eba524e7bb3c |
| institution | University of Oxford |
| last_indexed | 2024-03-06T21:30:34Z |
| publishDate | 2017 |
| publisher | Cell Press |
| record_format | dspace |
| spelling | oxford-uuid:448e22b2-c6ce-4a12-a76d-eba524e7bb3c2022-03-26T15:02:18ZUnveiling the influence of pH on the crystallization of hybrid perovskites, felivering low voltage loss photovoltaicsJournal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:448e22b2-c6ce-4a12-a76d-eba524e7bb3cSymplectic Elements at OxfordCell Press2017Noel, NCongiu, MRamadan, AFearn, SMcMeekin, DPatel, JJohnston, MWenger, BSnaith, HImpressive power conversion efficiencies coupled with the relative ease of fabrication have made perovskite solar cells a front runner for next-generation photovoltaics. Although perovskite films and optoelectronic devices have been widely studied, relatively little is known about the chemistry of the precursor solutions. Here, we present a study on the hydrolysis of N,N-dimethylformamide, correlating how pH changes related to its degradation affect the crystallization of MAPbI3xClx perovskite films. By careful manipulation of the pH, and the resulting colloid distribution in precursor solutions, we fabricate perovskite films with greatly improved crystallinity, which when incorporated into photovoltaic devices reproducibly yield efficiencies of over 18%. Extending this method to the mixed cation, mixed halide perovskite FA0.83MA0.17Pb(I0.83Br0.17)3, we obtain power conversion efficiencies of up to 19.9% and open-circuit voltages of 1.21 V for a material with a bandgap of 1.57 eV, achieving the lowest yet reported loss in potential from bandgap to a VOC of only 360 mV. |
| spellingShingle | Noel, N Congiu, M Ramadan, A Fearn, S McMeekin, D Patel, J Johnston, M Wenger, B Snaith, H Unveiling the influence of pH on the crystallization of hybrid perovskites, felivering low voltage loss photovoltaics |
| title | Unveiling the influence of pH on the crystallization of hybrid perovskites, felivering low voltage loss photovoltaics |
| title_full | Unveiling the influence of pH on the crystallization of hybrid perovskites, felivering low voltage loss photovoltaics |
| title_fullStr | Unveiling the influence of pH on the crystallization of hybrid perovskites, felivering low voltage loss photovoltaics |
| title_full_unstemmed | Unveiling the influence of pH on the crystallization of hybrid perovskites, felivering low voltage loss photovoltaics |
| title_short | Unveiling the influence of pH on the crystallization of hybrid perovskites, felivering low voltage loss photovoltaics |
| title_sort | unveiling the influence of ph on the crystallization of hybrid perovskites felivering low voltage loss photovoltaics |
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