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Improved environmental stability of organic lead trihalide perovskite-based photoactive-layers in the presence of mesoporous TiO2

Flannan T. F. O'Mahony, Yong Hui Lee, Cameron Jellett, Stoichko Dmitrov, Daniel T. J. Bryant, James R. Durrant, Brian C. O'Regan, Michael Graetzel, Mohammad K. Nazeeruddin, Saif A. Haque, Stoichko Dimitrov Orcid Logo

J. Mater. Chem. A, Volume: 3, Issue: 14, Pages: 7219 - 7223

Swansea University Author: Stoichko Dimitrov Orcid Logo

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DOI (Published version): 10.1039/C5TA01221J

Abstract

Impressive hybrid photovoltaic device performances have been realised with the methylammonium lead triiodide (MAPbI3) perovskite absorber in a wide range of device architectures. However, the question as to which of these systems represents the most commercially viable long-term prospect is yet to b...

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Published in: J. Mater. Chem. A
ISSN: 2050-7488 2050-7496
Published: The Royal Society of Chemistry 2015
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URI: https://cronfa.swan.ac.uk/Record/cronfa32020
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spelling 2017-02-21T12:02:24.2853163 v2 32020 2017-02-20 Improved environmental stability of organic lead trihalide perovskite-based photoactive-layers in the presence of mesoporous TiO2 9fc26ec1b8655cd0d66f7196a924fe14 0000-0002-1564-7080 Stoichko Dimitrov Stoichko Dimitrov true false 2017-02-20 EEN Impressive hybrid photovoltaic device performances have been realised with the methylammonium lead triiodide (MAPbI3) perovskite absorber in a wide range of device architectures. However, the question as to which of these systems represents the most commercially viable long-term prospect is yet to be answered conclusively. Here, we report on the photoinduced charge transfer processes in MAPbI3 based films measured under inert and ambient conditions. When exposed to ambient conditions, the coated mesoporous Al2O3 and bilayer systems show a rapid and significant degradation in the yield of long-lived charge separation. This process, which does not affect sensitized-mesoporous TiO2 films, is only found to occur when both light and oxygen are present. These observations indicate that the presence of a mesostructured TiO2 electron acceptor to rapidly extract the photoexcited electron from the perovskite sensitizer may be crucial for fundamental photovoltaic stability and significantly increases innate tolerance to environmental conditions. This work highlights a significant advantage of retaining mesoscale morphological control in the design of perovskite photovoltaics. Journal Article J. Mater. Chem. A 3 14 7219 7223 The Royal Society of Chemistry 2050-7488 2050-7496 31 12 2015 2015-12-31 10.1039/C5TA01221J http://dx.doi.org/10.1039/C5TA01221J COLLEGE NANME Engineering COLLEGE CODE EEN Swansea University 2017-02-21T12:02:24.2853163 2017-02-20T16:57:45.8896387 Faculty of Science and Engineering School of Engineering and Applied Sciences - Uncategorised Flannan T. F. O'Mahony 1 Yong Hui Lee 2 Cameron Jellett 3 Stoichko Dmitrov 4 Daniel T. J. Bryant 5 James R. Durrant 6 Brian C. O'Regan 7 Michael Graetzel 8 Mohammad K. Nazeeruddin 9 Saif A. Haque 10 Stoichko Dimitrov 0000-0002-1564-7080 11 0032020-21022017120214.pdf omahony2015.pdf 2017-02-21T12:02:14.1600000 Output 546931 application/pdf Version of Record true 2017-02-21T00:00:00.0000000 false eng
title Improved environmental stability of organic lead trihalide perovskite-based photoactive-layers in the presence of mesoporous TiO2
spellingShingle Improved environmental stability of organic lead trihalide perovskite-based photoactive-layers in the presence of mesoporous TiO2
Stoichko Dimitrov
title_short Improved environmental stability of organic lead trihalide perovskite-based photoactive-layers in the presence of mesoporous TiO2
title_full Improved environmental stability of organic lead trihalide perovskite-based photoactive-layers in the presence of mesoporous TiO2
title_fullStr Improved environmental stability of organic lead trihalide perovskite-based photoactive-layers in the presence of mesoporous TiO2
title_full_unstemmed Improved environmental stability of organic lead trihalide perovskite-based photoactive-layers in the presence of mesoporous TiO2
title_sort Improved environmental stability of organic lead trihalide perovskite-based photoactive-layers in the presence of mesoporous TiO2
author_id_str_mv 9fc26ec1b8655cd0d66f7196a924fe14
author_id_fullname_str_mv 9fc26ec1b8655cd0d66f7196a924fe14_***_Stoichko Dimitrov
author Stoichko Dimitrov
author2 Flannan T. F. O'Mahony
Yong Hui Lee
Cameron Jellett
Stoichko Dmitrov
Daniel T. J. Bryant
James R. Durrant
Brian C. O'Regan
Michael Graetzel
Mohammad K. Nazeeruddin
Saif A. Haque
Stoichko Dimitrov
format Journal article
container_title J. Mater. Chem. A
container_volume 3
container_issue 14
container_start_page 7219
publishDate 2015
institution Swansea University
issn 2050-7488
2050-7496
doi_str_mv 10.1039/C5TA01221J
publisher The Royal Society of Chemistry
college_str Faculty of Science and Engineering
hierarchytype
hierarchy_top_id facultyofscienceandengineering
hierarchy_top_title Faculty of Science and Engineering
hierarchy_parent_id facultyofscienceandengineering
hierarchy_parent_title Faculty of Science and Engineering
department_str School of Engineering and Applied Sciences - Uncategorised{{{_:::_}}}Faculty of Science and Engineering{{{_:::_}}}School of Engineering and Applied Sciences - Uncategorised
url http://dx.doi.org/10.1039/C5TA01221J
document_store_str 1
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description Impressive hybrid photovoltaic device performances have been realised with the methylammonium lead triiodide (MAPbI3) perovskite absorber in a wide range of device architectures. However, the question as to which of these systems represents the most commercially viable long-term prospect is yet to be answered conclusively. Here, we report on the photoinduced charge transfer processes in MAPbI3 based films measured under inert and ambient conditions. When exposed to ambient conditions, the coated mesoporous Al2O3 and bilayer systems show a rapid and significant degradation in the yield of long-lived charge separation. This process, which does not affect sensitized-mesoporous TiO2 films, is only found to occur when both light and oxygen are present. These observations indicate that the presence of a mesostructured TiO2 electron acceptor to rapidly extract the photoexcited electron from the perovskite sensitizer may be crucial for fundamental photovoltaic stability and significantly increases innate tolerance to environmental conditions. This work highlights a significant advantage of retaining mesoscale morphological control in the design of perovskite photovoltaics.
published_date 2015-12-31T03:39:10Z
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