The study of ion migration in methylammonium lead bromide crystals
| dc.contributor.advisor | Diale, M. (Mmantsae Moche) | |
| dc.contributor.coadvisor | Legodi, Matshisa | |
| dc.contributor.email | mrwetyana.nosicelo@gmail.com | en_ZA |
| dc.contributor.postgraduate | Mrwetyana, Nosicelo | |
| dc.date.accessioned | 2021-02-17T12:41:00Z | |
| dc.date.available | 2021-02-17T12:41:00Z | |
| dc.date.created | 2020-05-06 | |
| dc.date.issued | 2020 | |
| dc.description | Dissertation (MSc (Physics))--University of Pretoria, 2020. | en_ZA |
| dc.description.abstract | 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. | en_ZA |
| dc.description.availability | Restricted | en_ZA |
| dc.description.degree | MSc (Physics) | en_ZA |
| dc.description.department | Physics | en_ZA |
| dc.description.sponsorship | NRF Funding | en_ZA |
| dc.identifier.citation | * | en_ZA |
| dc.identifier.other | A2021 | en_ZA |
| dc.identifier.uri | http://hdl.handle.net/2263/78734 | |
| dc.language.iso | en | en_ZA |
| dc.publisher | University of Pretoria | |
| dc.rights | © 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. | |
| dc.subject | UCTD | en_ZA |
| dc.subject | Ion Migration | en_ZA |
| dc.subject | Perovskite | en_ZA |
| dc.subject | Hysteresis | en_ZA |
| dc.subject | Current transients | en_ZA |
| dc.subject | Methylammonium Lead Bromide | en_ZA |
| dc.title | The study of ion migration in methylammonium lead bromide crystals | en_ZA |
| dc.type | Dissertation | en_ZA |