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Origin of Exceptionally Slow Light Soaking Effect in Mesoporous Carbon Perovskite Solar Cells with AVA Additive

Adam Pockett, Dimitrios Raptis, Simone M. P. Meroni, Jenny Baker Orcid Logo, Trystan Watson Orcid Logo, Matt Carnie Orcid Logo

The Journal of Physical Chemistry C, Volume: 123, Issue: 18, Pages: 11414 - 11421

Swansea University Authors: Adam Pockett, Jenny Baker Orcid Logo, Trystan Watson Orcid Logo, Matt Carnie Orcid Logo

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Abstract

A range of slow dynamic processes occurring in perovskite solar cells have been linked to ionic migration, including J–V hysteresis and long photovoltage rise and decay times. This work demonstrates the remarkably slow response time of triple mesoporous carbon-based cells, containing the additive 5-...

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Published in: The Journal of Physical Chemistry C
ISSN: 1932-7447 1932-7455
Published: 2019
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URI: https://cronfa.swan.ac.uk/Record/cronfa50063
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This work demonstrates the remarkably slow response time of triple mesoporous carbon-based cells, containing the additive 5-aminovaleric acid iodide (AVA). The photovoltage rise under illumination is 1&#x2013;2 orders of magnitude longer than has previously been observed for planar and mesoporous TiO2 based devices. Transient photovoltage measurements during this slow rise in voltage show a strong negative transient feature which demonstrates the presence of fast recombination. By analyzing the rate of Voc rise and the decay of this negative transient, we show a clear link between this recombination process and the limiting of the Voc. The reduction of recombination over time and the resultant rise in Voc are influenced by the movement of ions in the perovskite. From temperature-dependent measurements, an activation energy consistent with previous literature values for iodide ion migration is obtained, although the attempt frequency is found to be many orders of magnitude lower than that in pure MAPI perovskite devices. We attribute this to the presence of the AVA molecule inhibiting the movement of ions. The importance of the TiO2/ZrO2 interface in leading to this slow behavior is revealed by studying devices with different architectures with and without the AVA additive. 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spelling 2019-05-13T13:48:21.2662771 v2 50063 2019-04-23 Origin of Exceptionally Slow Light Soaking Effect in Mesoporous Carbon Perovskite Solar Cells with AVA Additive de06433fccc0514dcf45aa9d1fc5c60f Adam Pockett Adam Pockett true false 6913b56f36f0c8cd34d8c9040d2df460 0000-0003-3530-1957 Jenny Baker Jenny Baker true false a210327b52472cfe8df9b8108d661457 0000-0002-8015-1436 Trystan Watson Trystan Watson true false 73b367694366a646b90bb15db32bb8c0 0000-0002-4232-1967 Matt Carnie Matt Carnie true false 2019-04-23 FGSEN A range of slow dynamic processes occurring in perovskite solar cells have been linked to ionic migration, including J–V hysteresis and long photovoltage rise and decay times. This work demonstrates the remarkably slow response time of triple mesoporous carbon-based cells, containing the additive 5-aminovaleric acid iodide (AVA). The photovoltage rise under illumination is 1–2 orders of magnitude longer than has previously been observed for planar and mesoporous TiO2 based devices. Transient photovoltage measurements during this slow rise in voltage show a strong negative transient feature which demonstrates the presence of fast recombination. By analyzing the rate of Voc rise and the decay of this negative transient, we show a clear link between this recombination process and the limiting of the Voc. The reduction of recombination over time and the resultant rise in Voc are influenced by the movement of ions in the perovskite. From temperature-dependent measurements, an activation energy consistent with previous literature values for iodide ion migration is obtained, although the attempt frequency is found to be many orders of magnitude lower than that in pure MAPI perovskite devices. We attribute this to the presence of the AVA molecule inhibiting the movement of ions. The importance of the TiO2/ZrO2 interface in leading to this slow behavior is revealed by studying devices with different architectures with and without the AVA additive. A significant increase in response time can only be recreated in a device with both of the mesoporous metal oxide layers and the AVA additive present in the perovskite. Journal Article The Journal of Physical Chemistry C 123 18 11414 11421 1932-7447 1932-7455 9 5 2019 2019-05-09 10.1021/acs.jpcc.9b01058 COLLEGE NANME Science and Engineering - Faculty COLLEGE CODE FGSEN Swansea University RCUK, EP/P032591/1 2019-05-13T13:48:21.2662771 2019-04-23T15:29:33.8456780 College of Engineering Engineering Adam Pockett 1 Dimitrios Raptis 2 Simone M. P. Meroni 3 Jenny Baker 0000-0003-3530-1957 4 Trystan Watson 0000-0002-8015-1436 5 Matt Carnie 0000-0002-4232-1967 6 0050063-09052019162224.pdf 50063.pdf 2019-05-09T16:22:24.3570000 Output 1165381 application/pdf Version of Record true 2019-05-08T00:00:00.0000000 Released under the terms of a Creative Commons Attribution License (CC-BY). true eng
title Origin of Exceptionally Slow Light Soaking Effect in Mesoporous Carbon Perovskite Solar Cells with AVA Additive
spellingShingle Origin of Exceptionally Slow Light Soaking Effect in Mesoporous Carbon Perovskite Solar Cells with AVA Additive
Adam Pockett
Jenny Baker
Trystan Watson
Matt Carnie
title_short Origin of Exceptionally Slow Light Soaking Effect in Mesoporous Carbon Perovskite Solar Cells with AVA Additive
title_full Origin of Exceptionally Slow Light Soaking Effect in Mesoporous Carbon Perovskite Solar Cells with AVA Additive
title_fullStr Origin of Exceptionally Slow Light Soaking Effect in Mesoporous Carbon Perovskite Solar Cells with AVA Additive
title_full_unstemmed Origin of Exceptionally Slow Light Soaking Effect in Mesoporous Carbon Perovskite Solar Cells with AVA Additive
title_sort Origin of Exceptionally Slow Light Soaking Effect in Mesoporous Carbon Perovskite Solar Cells with AVA Additive
author_id_str_mv de06433fccc0514dcf45aa9d1fc5c60f
6913b56f36f0c8cd34d8c9040d2df460
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author_id_fullname_str_mv de06433fccc0514dcf45aa9d1fc5c60f_***_Adam Pockett
6913b56f36f0c8cd34d8c9040d2df460_***_Jenny Baker
a210327b52472cfe8df9b8108d661457_***_Trystan Watson
73b367694366a646b90bb15db32bb8c0_***_Matt Carnie
author Adam Pockett
Jenny Baker
Trystan Watson
Matt Carnie
author2 Adam Pockett
Dimitrios Raptis
Simone M. P. Meroni
Jenny Baker
Trystan Watson
Matt Carnie
format Journal article
container_title The Journal of Physical Chemistry C
container_volume 123
container_issue 18
container_start_page 11414
publishDate 2019
institution Swansea University
issn 1932-7447
1932-7455
doi_str_mv 10.1021/acs.jpcc.9b01058
college_str College of Engineering
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description A range of slow dynamic processes occurring in perovskite solar cells have been linked to ionic migration, including J–V hysteresis and long photovoltage rise and decay times. This work demonstrates the remarkably slow response time of triple mesoporous carbon-based cells, containing the additive 5-aminovaleric acid iodide (AVA). The photovoltage rise under illumination is 1–2 orders of magnitude longer than has previously been observed for planar and mesoporous TiO2 based devices. Transient photovoltage measurements during this slow rise in voltage show a strong negative transient feature which demonstrates the presence of fast recombination. By analyzing the rate of Voc rise and the decay of this negative transient, we show a clear link between this recombination process and the limiting of the Voc. The reduction of recombination over time and the resultant rise in Voc are influenced by the movement of ions in the perovskite. From temperature-dependent measurements, an activation energy consistent with previous literature values for iodide ion migration is obtained, although the attempt frequency is found to be many orders of magnitude lower than that in pure MAPI perovskite devices. We attribute this to the presence of the AVA molecule inhibiting the movement of ions. The importance of the TiO2/ZrO2 interface in leading to this slow behavior is revealed by studying devices with different architectures with and without the AVA additive. A significant increase in response time can only be recreated in a device with both of the mesoporous metal oxide layers and the AVA additive present in the perovskite.
published_date 2019-05-09T04:03:22Z
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