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Evidence for surface defect passivation as the origin of the remarkable photostability of unencapsulated perovskite solar cells employing aminovaleric acid as a processing additive

Chieh-Ting Lin, Francesca De Rossi, Jinhyun Kim, Jenny Baker Orcid Logo, Jonathan Ngiam, Bob Xu, Sebastian Pont, Nicholas Aristidou, Saif A. Haque, Trystan Watson Orcid Logo, Martyn A. McLachlan, James Durrant Orcid Logo

Journal of Materials Chemistry A, Volume: 7, Issue: 7, Pages: 3006 - 3011

Swansea University Authors: Jenny Baker Orcid Logo, Trystan Watson Orcid Logo, James Durrant Orcid Logo

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DOI (Published version): 10.1039/C8TA11985F

Abstract

This study addresses the cause of enhanced stability of methyl ammonium lead iodide when processed with aminovaleric acid additives (AVA-MAPbI3) in screen printed, hole transport layer free perovskite solar cells with carbon top electrodes (c-PSC). Employing AVA as an additive in the active layer ca...

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Published in: Journal of Materials Chemistry A
ISSN: 2050-7488 2050-7496
Published: 2019
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URI: https://cronfa.swan.ac.uk/Record/cronfa48968
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spelling 2019-04-02T14:19:29.3226113 v2 48968 2019-02-25 Evidence for surface defect passivation as the origin of the remarkable photostability of unencapsulated perovskite solar cells employing aminovaleric acid as a processing additive 6913b56f36f0c8cd34d8c9040d2df460 0000-0003-3530-1957 Jenny Baker Jenny Baker true false a210327b52472cfe8df9b8108d661457 0000-0002-8015-1436 Trystan Watson Trystan Watson true false f3dd64bc260e5c07adfa916c27dbd58a 0000-0001-8353-7345 James Durrant James Durrant true false 2019-02-25 MECH This study addresses the cause of enhanced stability of methyl ammonium lead iodide when processed with aminovaleric acid additives (AVA-MAPbI3) in screen printed, hole transport layer free perovskite solar cells with carbon top electrodes (c-PSC). Employing AVA as an additive in the active layer caused a 40-fold increase in device lifetime measured under full sun illumination in ambient air (RH ∼ 15%). This stability improvement with AVA was also observed in optical photobleaching studies of planar films on glass, indicating this improvement is intrinsic to the perovskite film. Employing low-energy ion scattering spectroscopy, photoluminescence studies as a function of AVA and oxygen exposure, and a molecular probe for superoxide generation, we conclude that even though superoxide is generated in both AVA-MAPbI3 and MAPbI3 films, AVA located at grain boundaries is able to passivate surface defect sites, resulting in enhanced resistivity to oxygen induced degradation. These results are discussed in terms of their implications for the design of environmentally stable perovskite solar cells. Journal Article Journal of Materials Chemistry A 7 7 3006 3011 2050-7488 2050-7496 31 12 2019 2019-12-31 10.1039/C8TA11985F COLLEGE NANME Mechanical Engineering COLLEGE CODE MECH Swansea University 2019-04-02T14:19:29.3226113 2019-02-25T09:18:07.3203853 Faculty of Science and Engineering School of Engineering and Applied Sciences - Materials Science and Engineering Chieh-Ting Lin 1 Francesca De Rossi 2 Jinhyun Kim 3 Jenny Baker 0000-0003-3530-1957 4 Jonathan Ngiam 5 Bob Xu 6 Sebastian Pont 7 Nicholas Aristidou 8 Saif A. Haque 9 Trystan Watson 0000-0002-8015-1436 10 Martyn A. McLachlan 11 James Durrant 0000-0001-8353-7345 12 0048968-25022019095615.pdf lin2019v2.pdf 2019-02-25T09:56:15.0670000 Output 1399202 application/pdf Accepted Manuscript true 2020-01-29T00:00:00.0000000 true eng
title Evidence for surface defect passivation as the origin of the remarkable photostability of unencapsulated perovskite solar cells employing aminovaleric acid as a processing additive
spellingShingle Evidence for surface defect passivation as the origin of the remarkable photostability of unencapsulated perovskite solar cells employing aminovaleric acid as a processing additive
Jenny Baker
Trystan Watson
James Durrant
title_short Evidence for surface defect passivation as the origin of the remarkable photostability of unencapsulated perovskite solar cells employing aminovaleric acid as a processing additive
title_full Evidence for surface defect passivation as the origin of the remarkable photostability of unencapsulated perovskite solar cells employing aminovaleric acid as a processing additive
title_fullStr Evidence for surface defect passivation as the origin of the remarkable photostability of unencapsulated perovskite solar cells employing aminovaleric acid as a processing additive
title_full_unstemmed Evidence for surface defect passivation as the origin of the remarkable photostability of unencapsulated perovskite solar cells employing aminovaleric acid as a processing additive
title_sort Evidence for surface defect passivation as the origin of the remarkable photostability of unencapsulated perovskite solar cells employing aminovaleric acid as a processing additive
author_id_str_mv 6913b56f36f0c8cd34d8c9040d2df460
a210327b52472cfe8df9b8108d661457
f3dd64bc260e5c07adfa916c27dbd58a
author_id_fullname_str_mv 6913b56f36f0c8cd34d8c9040d2df460_***_Jenny Baker
a210327b52472cfe8df9b8108d661457_***_Trystan Watson
f3dd64bc260e5c07adfa916c27dbd58a_***_James Durrant
author Jenny Baker
Trystan Watson
James Durrant
author2 Chieh-Ting Lin
Francesca De Rossi
Jinhyun Kim
Jenny Baker
Jonathan Ngiam
Bob Xu
Sebastian Pont
Nicholas Aristidou
Saif A. Haque
Trystan Watson
Martyn A. McLachlan
James Durrant
format Journal article
container_title Journal of Materials Chemistry A
container_volume 7
container_issue 7
container_start_page 3006
publishDate 2019
institution Swansea University
issn 2050-7488
2050-7496
doi_str_mv 10.1039/C8TA11985F
college_str Faculty of Science and Engineering
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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 - Materials Science and Engineering{{{_:::_}}}Faculty of Science and Engineering{{{_:::_}}}School of Engineering and Applied Sciences - Materials Science and Engineering
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description This study addresses the cause of enhanced stability of methyl ammonium lead iodide when processed with aminovaleric acid additives (AVA-MAPbI3) in screen printed, hole transport layer free perovskite solar cells with carbon top electrodes (c-PSC). Employing AVA as an additive in the active layer caused a 40-fold increase in device lifetime measured under full sun illumination in ambient air (RH ∼ 15%). This stability improvement with AVA was also observed in optical photobleaching studies of planar films on glass, indicating this improvement is intrinsic to the perovskite film. Employing low-energy ion scattering spectroscopy, photoluminescence studies as a function of AVA and oxygen exposure, and a molecular probe for superoxide generation, we conclude that even though superoxide is generated in both AVA-MAPbI3 and MAPbI3 films, AVA located at grain boundaries is able to passivate surface defect sites, resulting in enhanced resistivity to oxygen induced degradation. These results are discussed in terms of their implications for the design of environmentally stable perovskite solar cells.
published_date 2019-12-31T03:56:29Z
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