Enhanced mobility CsPbI3 quantum dot arrays for record-efficiency, high-voltage photovoltaic cells
We developed lead halide perovskite quantum dot (QD) films with tuned surface chemistry based on A-site cation halide salt (AX) treatments. QD perovskites offer colloidal synthesis and processing using industrially friendly solvents, which decouples grain growth from film deposition, and at present...
| Main Authors: | , , , , , , , , , |
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| Format: | Journal article |
| Language: | English |
| Published: |
American Association for the Advancement of Science
2017
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| _version_ | 1826285152279461888 |
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| author | Sanehira, E Marshall, A Christians, J Harvey, S Ciesielski, P Wheeler, L Schulz, P Lin, L Beard, M Luther, J |
| author_facet | Sanehira, E Marshall, A Christians, J Harvey, S Ciesielski, P Wheeler, L Schulz, P Lin, L Beard, M Luther, J |
| author_sort | Sanehira, E |
| collection | OXFORD |
| description | We developed lead halide perovskite quantum dot (QD) films with tuned surface chemistry based on A-site cation halide salt (AX) treatments. QD perovskites offer colloidal synthesis and processing using industrially friendly solvents, which decouples grain growth from film deposition, and at present produce larger open-circuit voltages (VOC’s) than thin-film perovskites. CsPbI3 QDs, with a tunable bandgap between 1.75 and 2.13 eV, are an ideal top cell candidate for all-perovskite multijunction solar cells because of their demonstrated small VOC deficit. We show that charge carrier mobility within perovskite QD films is dictated by the chemical conditions at the QD-QD junctions. The AX treatments provide a method for tuning the coupling between perovskite QDs, which is exploited for improved charge transport for fabricating high-quality QD films and devices. The AX treatments presented here double the film mobility, enabling increased photocurrent, and lead to a record certified QD solar cell efficiency of 13.43%. |
| first_indexed | 2024-03-07T01:24:34Z |
| format | Journal article |
| id | oxford-uuid:9186c870-ac70-4578-84ab-63f875381aae |
| institution | University of Oxford |
| language | English |
| last_indexed | 2024-03-07T01:24:34Z |
| publishDate | 2017 |
| publisher | American Association for the Advancement of Science |
| record_format | dspace |
| spelling | oxford-uuid:9186c870-ac70-4578-84ab-63f875381aae2022-03-26T23:19:19ZEnhanced mobility CsPbI3 quantum dot arrays for record-efficiency, high-voltage photovoltaic cellsJournal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:9186c870-ac70-4578-84ab-63f875381aaeEnglishSymplectic Elements at OxfordAmerican Association for the Advancement of Science2017Sanehira, EMarshall, AChristians, JHarvey, SCiesielski, PWheeler, LSchulz, PLin, LBeard, MLuther, JWe developed lead halide perovskite quantum dot (QD) films with tuned surface chemistry based on A-site cation halide salt (AX) treatments. QD perovskites offer colloidal synthesis and processing using industrially friendly solvents, which decouples grain growth from film deposition, and at present produce larger open-circuit voltages (VOC’s) than thin-film perovskites. CsPbI3 QDs, with a tunable bandgap between 1.75 and 2.13 eV, are an ideal top cell candidate for all-perovskite multijunction solar cells because of their demonstrated small VOC deficit. We show that charge carrier mobility within perovskite QD films is dictated by the chemical conditions at the QD-QD junctions. The AX treatments provide a method for tuning the coupling between perovskite QDs, which is exploited for improved charge transport for fabricating high-quality QD films and devices. The AX treatments presented here double the film mobility, enabling increased photocurrent, and lead to a record certified QD solar cell efficiency of 13.43%. |
| spellingShingle | Sanehira, E Marshall, A Christians, J Harvey, S Ciesielski, P Wheeler, L Schulz, P Lin, L Beard, M Luther, J Enhanced mobility CsPbI3 quantum dot arrays for record-efficiency, high-voltage photovoltaic cells |
| title | Enhanced mobility CsPbI3 quantum dot arrays for record-efficiency, high-voltage photovoltaic cells |
| title_full | Enhanced mobility CsPbI3 quantum dot arrays for record-efficiency, high-voltage photovoltaic cells |
| title_fullStr | Enhanced mobility CsPbI3 quantum dot arrays for record-efficiency, high-voltage photovoltaic cells |
| title_full_unstemmed | Enhanced mobility CsPbI3 quantum dot arrays for record-efficiency, high-voltage photovoltaic cells |
| title_short | Enhanced mobility CsPbI3 quantum dot arrays for record-efficiency, high-voltage photovoltaic cells |
| title_sort | enhanced mobility cspbi3 quantum dot arrays for record efficiency high voltage photovoltaic cells |
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