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The study of ion migration in methylammonium lead bromide crystals
Dissertation (MSc (Physics))--University of Pretoria, 2020.
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| Format: | Thesis |
| Language: | English |
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University of Pretoria
2021
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| _version_ | 1867613499829518336 |
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| access_status_str | Open Access |
| author2 | Diale, M. (Mmantsae Moche) |
| author_browse | Diale, M. (Mmantsae Moche) |
| author_facet | Diale, M. (Mmantsae Moche) |
| collection | Thesis |
| dc_rights_str_mv | © 2019 University of Pretoria. All rights reserved. The copyright in this work vests in the University of Pretoria. No part of this work may be reproduced or transmitted in any form or by any means, without the prior written permission of the University of Pretoria. |
| description | Dissertation (MSc (Physics))--University of Pretoria, 2020. |
| format | Thesis |
| id | oai:repository.up.ac.za:2263/78734 |
| institution | University of Pretoria (South Africa) |
| language | English |
| last_indexed | 2026-06-10T12:37:07.698Z |
| license_str | Other — see source repository |
| provenance_str_mv | Harvested via OAI-PMH from UPSpace — University of Pretoria Institutional Repository |
| publishDate | 2021 |
| publishDateRange | 2021 |
| publishDateSort | 2021 |
| publisher | University of Pretoria |
| publisherStr | University of Pretoria |
| record_format | dspace |
| source_str | UPSpace — University of Pretoria Institutional Repository |
| spelling | oai:repository.up.ac.za:2263/78734 The study of ion migration in methylammonium lead bromide crystals Diale, M. (Mmantsae Moche) mrwetyana.nosicelo@gmail.com Legodi, Matshisa Mrwetyana, Nosicelo UCTD Ion Migration Perovskite Hysteresis Current transients Methylammonium Lead Bromide Dissertation (MSc (Physics))--University of Pretoria, 2020. The Inverse Temperature Crystallization (ITC) and seed-induced method were used to grow high-quality cubic samples within hours using a 1M solution of methylammonium lead bromide (MAPbBr3) samples. The current-voltage (I-V) hysteresis observed within the MAPbBr3 perovskite sample demonstrates anomalous dependence on scan rate and various preconditioning pulses. We investigate this dependence and the relationship of current-transient with slow migrating ions. The current transients fitted using a bi-exponential decay model produced two distinct time constants t1 = 38.4 s and t2 = 6.49 s associated with migrating ionic species. From the Arrhenius plot an activation energy of Ea = 0.410 associated with migrating Br ions was extracted. Future research is required towards the understanding of I-V hysteresis and the link to ion migration in MAPbBr3 perovskite. NRF Funding Physics MSc (Physics) Restricted 2021-02-17T12:41:00Z 2021-02-17T12:41:00Z 2020-05-06 2020 Dissertation * A2021 http://hdl.handle.net/2263/78734 en © 2019 University of Pretoria. All rights reserved. The copyright in this work vests in the University of Pretoria. No part of this work may be reproduced or transmitted in any form or by any means, without the prior written permission of the University of Pretoria. application/pdf University of Pretoria |
| spellingShingle | UCTD Ion Migration Perovskite Hysteresis Current transients Methylammonium Lead Bromide The study of ion migration in methylammonium lead bromide crystals |
| title | The study of ion migration in methylammonium lead bromide crystals |
| title_full | The study of ion migration in methylammonium lead bromide crystals |
| title_fullStr | The study of ion migration in methylammonium lead bromide crystals |
| title_full_unstemmed | The study of ion migration in methylammonium lead bromide crystals |
| title_short | The study of ion migration in methylammonium lead bromide crystals |
| title_sort | study of ion migration in methylammonium lead bromide crystals |
| topic | UCTD Ion Migration Perovskite Hysteresis Current transients Methylammonium Lead Bromide |
| url | http://hdl.handle.net/2263/78734 |