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Photoluminescence from Radiative Surface States and Excitons in Methylammonium Lead Bromide Perovskites
[Image: see text] In view of its band gap of 2.2 eV and its stability, methylammonium lead bromide (MAPbBr(3)) is a possible candidate to serve as a light absorber in a subcell of a multijunction solar cell. Using complementary temperature-dependent time-resolved microwave conductance (TRMC) and pho...
Autores principales: | , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
American Chemical
Society
2017
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Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5592651/ https://www.ncbi.nlm.nih.gov/pubmed/28832152 http://dx.doi.org/10.1021/acs.jpclett.7b01642 |
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author | Guo, Dengyang Bartesaghi, Davide Wei, Haotong Hutter, Eline M. Huang, Jinsong Savenije, Tom J. |
author_facet | Guo, Dengyang Bartesaghi, Davide Wei, Haotong Hutter, Eline M. Huang, Jinsong Savenije, Tom J. |
author_sort | Guo, Dengyang |
collection | PubMed |
description | [Image: see text] In view of its band gap of 2.2 eV and its stability, methylammonium lead bromide (MAPbBr(3)) is a possible candidate to serve as a light absorber in a subcell of a multijunction solar cell. Using complementary temperature-dependent time-resolved microwave conductance (TRMC) and photoluminescence (TRPL) measurements, we demonstrate that the exciton yield increases with lower temperature at the expense of the charge carrier generation yield. The low-energy emission at around 580 nm in the cubic phase and the second broad emission peak at 622 nm in the orthorhombic phase originate from radiative recombination of charges trapped in defects with mobile countercharges. We present a kinetic model describing both the decay in conductance as well as the slow ingrowth of the TRPL. Knowledge of defect states at the surface of various crystal phases is of interest to reach higher open-circuit voltages in MAPbBr(3)-based cells. |
format | Online Article Text |
id | pubmed-5592651 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2017 |
publisher | American Chemical
Society |
record_format | MEDLINE/PubMed |
spelling | pubmed-55926512017-09-14 Photoluminescence from Radiative Surface States and Excitons in Methylammonium Lead Bromide Perovskites Guo, Dengyang Bartesaghi, Davide Wei, Haotong Hutter, Eline M. Huang, Jinsong Savenije, Tom J. J Phys Chem Lett [Image: see text] In view of its band gap of 2.2 eV and its stability, methylammonium lead bromide (MAPbBr(3)) is a possible candidate to serve as a light absorber in a subcell of a multijunction solar cell. Using complementary temperature-dependent time-resolved microwave conductance (TRMC) and photoluminescence (TRPL) measurements, we demonstrate that the exciton yield increases with lower temperature at the expense of the charge carrier generation yield. The low-energy emission at around 580 nm in the cubic phase and the second broad emission peak at 622 nm in the orthorhombic phase originate from radiative recombination of charges trapped in defects with mobile countercharges. We present a kinetic model describing both the decay in conductance as well as the slow ingrowth of the TRPL. Knowledge of defect states at the surface of various crystal phases is of interest to reach higher open-circuit voltages in MAPbBr(3)-based cells. American Chemical Society 2017-08-23 2017-09-07 /pmc/articles/PMC5592651/ /pubmed/28832152 http://dx.doi.org/10.1021/acs.jpclett.7b01642 Text en Copyright © 2017 American Chemical Society This is an open access article published under a Creative Commons Non-Commercial No Derivative Works (CC-BY-NC-ND) Attribution License (http://pubs.acs.org/page/policy/authorchoice_ccbyncnd_termsofuse.html) , which permits copying and redistribution of the article, and creation of adaptations, all for non-commercial purposes. |
spellingShingle | Guo, Dengyang Bartesaghi, Davide Wei, Haotong Hutter, Eline M. Huang, Jinsong Savenije, Tom J. Photoluminescence from Radiative Surface States and Excitons in Methylammonium Lead Bromide Perovskites |
title | Photoluminescence from Radiative Surface States and
Excitons in Methylammonium Lead Bromide Perovskites |
title_full | Photoluminescence from Radiative Surface States and
Excitons in Methylammonium Lead Bromide Perovskites |
title_fullStr | Photoluminescence from Radiative Surface States and
Excitons in Methylammonium Lead Bromide Perovskites |
title_full_unstemmed | Photoluminescence from Radiative Surface States and
Excitons in Methylammonium Lead Bromide Perovskites |
title_short | Photoluminescence from Radiative Surface States and
Excitons in Methylammonium Lead Bromide Perovskites |
title_sort | photoluminescence from radiative surface states and
excitons in methylammonium lead bromide perovskites |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5592651/ https://www.ncbi.nlm.nih.gov/pubmed/28832152 http://dx.doi.org/10.1021/acs.jpclett.7b01642 |
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