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Dark electrical bias effect on moisture-induced degradation in inverted lead halide perovskite solar cells measured by advanced chemical probes

Jeremy Barbe, Vikas Kumar, Michael Newman, Harrison Lee, Sagar Jain, Hu Chen, Cécile Charbonneau, C Rodenburg, Wing Tsoi, Cecile Charbonneau Orcid Logo, Wing Chung Tsoi Orcid Logo

Sustainable Energy & Fuels

Swansea University Authors: Sagar Jain, Cecile Charbonneau Orcid Logo, Wing Chung Tsoi Orcid Logo

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DOI (Published version): 10.1039/C7SE00545H

Abstract

Emerging lead halide perovskite materials have enormous potential for a range of optoelectronic devices, such as solar cells, light emitting diodes, transistors and lasers. However, the large-scale commercialization of these technologies will depend on the ability of the active material to be stable...

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Published in: Sustainable Energy & Fuels
ISSN: 2398-4902
Published: 2018
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URI: https://cronfa.swan.ac.uk/Record/cronfa38522
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However, the large-scale commercialization of these technologies will depend on the ability of the active material to be stable under environmental and operating conditions. In this work, we measured the first time the electrical bias-induced degradation of inverted perovskite solar cells in the dark in different environments and concluded that humidity coupled with electrical bias results in fast degradation of CH3NH3PbI3 into PbI2. Micro-Raman and photoluminescence show that the degradation starts from the edge of the cell due to moisture ingress. By using novel local Raman-transient photocurrent measurements, we were able to probe local ion migration at the degraded region and non-degraded region and found that the formation of PbI2 can passivate perovskite by reducing ion migration. The degradation is far from uniform across different grains as revealed by secondary electron hyperspectral imaging, an advanced scanning electron microscopy technique which allows probing the composition of individual grain from the cross-section. By using potential step chronoamperometry, we also found that the bias degradation is closely related to the density of mobile ions. 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spelling 2018-10-30T15:42:19.4335368 v2 38522 2018-02-13 Dark electrical bias effect on moisture-induced degradation in inverted lead halide perovskite solar cells measured by advanced chemical probes 7073e179bb5b82db3e3efd3a8cd07139 Sagar Jain Sagar Jain true false 4dc059714847cb22ed922ab058950560 0000-0001-9887-2007 Cecile Charbonneau Cecile Charbonneau true false 7e5f541df6635a9a8e1a579ff2de5d56 0000-0003-3836-5139 Wing Chung Tsoi Wing Chung Tsoi true false 2018-02-13 EEN Emerging lead halide perovskite materials have enormous potential for a range of optoelectronic devices, such as solar cells, light emitting diodes, transistors and lasers. However, the large-scale commercialization of these technologies will depend on the ability of the active material to be stable under environmental and operating conditions. In this work, we measured the first time the electrical bias-induced degradation of inverted perovskite solar cells in the dark in different environments and concluded that humidity coupled with electrical bias results in fast degradation of CH3NH3PbI3 into PbI2. Micro-Raman and photoluminescence show that the degradation starts from the edge of the cell due to moisture ingress. By using novel local Raman-transient photocurrent measurements, we were able to probe local ion migration at the degraded region and non-degraded region and found that the formation of PbI2 can passivate perovskite by reducing ion migration. The degradation is far from uniform across different grains as revealed by secondary electron hyperspectral imaging, an advanced scanning electron microscopy technique which allows probing the composition of individual grain from the cross-section. By using potential step chronoamperometry, we also found that the bias degradation is closely related to the density of mobile ions. The unique combination of established methods with several novel analytical tools provides an insight into the origin of the bias-degradation of inverted perovskite solar cells from nano-scale to cell level, and demonstrates the potential of these novel tools for studying the degradation in other perovskite systems. Journal Article Sustainable Energy & Fuels 2398-4902 31 12 2018 2018-12-31 10.1039/C7SE00545H COLLEGE NANME Engineering COLLEGE CODE EEN Swansea University 2018-10-30T15:42:19.4335368 2018-02-13T09:09:18.0065859 Faculty of Science and Engineering School of Engineering and Applied Sciences - Materials Science and Engineering Jeremy Barbe 1 Vikas Kumar 2 Michael Newman 3 Harrison Lee 4 Sagar Jain 5 Hu Chen 6 Cécile Charbonneau 7 C Rodenburg 8 Wing Tsoi 9 Cecile Charbonneau 0000-0001-9887-2007 10 Wing Chung Tsoi 0000-0003-3836-5139 11 0038522-13022018091108.pdf barbe2018.pdf 2018-02-13T09:11:08.5930000 Output 1622548 application/pdf Accepted Manuscript true 2019-02-12T00:00:00.0000000 true eng
title Dark electrical bias effect on moisture-induced degradation in inverted lead halide perovskite solar cells measured by advanced chemical probes
spellingShingle Dark electrical bias effect on moisture-induced degradation in inverted lead halide perovskite solar cells measured by advanced chemical probes
Sagar Jain
Cecile Charbonneau
Wing Chung Tsoi
title_short Dark electrical bias effect on moisture-induced degradation in inverted lead halide perovskite solar cells measured by advanced chemical probes
title_full Dark electrical bias effect on moisture-induced degradation in inverted lead halide perovskite solar cells measured by advanced chemical probes
title_fullStr Dark electrical bias effect on moisture-induced degradation in inverted lead halide perovskite solar cells measured by advanced chemical probes
title_full_unstemmed Dark electrical bias effect on moisture-induced degradation in inverted lead halide perovskite solar cells measured by advanced chemical probes
title_sort Dark electrical bias effect on moisture-induced degradation in inverted lead halide perovskite solar cells measured by advanced chemical probes
author_id_str_mv 7073e179bb5b82db3e3efd3a8cd07139
4dc059714847cb22ed922ab058950560
7e5f541df6635a9a8e1a579ff2de5d56
author_id_fullname_str_mv 7073e179bb5b82db3e3efd3a8cd07139_***_Sagar Jain
4dc059714847cb22ed922ab058950560_***_Cecile Charbonneau
7e5f541df6635a9a8e1a579ff2de5d56_***_Wing Chung Tsoi
author Sagar Jain
Cecile Charbonneau
Wing Chung Tsoi
author2 Jeremy Barbe
Vikas Kumar
Michael Newman
Harrison Lee
Sagar Jain
Hu Chen
Cécile Charbonneau
C Rodenburg
Wing Tsoi
Cecile Charbonneau
Wing Chung Tsoi
format Journal article
container_title Sustainable Energy & Fuels
publishDate 2018
institution Swansea University
issn 2398-4902
doi_str_mv 10.1039/C7SE00545H
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
document_store_str 1
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description Emerging lead halide perovskite materials have enormous potential for a range of optoelectronic devices, such as solar cells, light emitting diodes, transistors and lasers. However, the large-scale commercialization of these technologies will depend on the ability of the active material to be stable under environmental and operating conditions. In this work, we measured the first time the electrical bias-induced degradation of inverted perovskite solar cells in the dark in different environments and concluded that humidity coupled with electrical bias results in fast degradation of CH3NH3PbI3 into PbI2. Micro-Raman and photoluminescence show that the degradation starts from the edge of the cell due to moisture ingress. By using novel local Raman-transient photocurrent measurements, we were able to probe local ion migration at the degraded region and non-degraded region and found that the formation of PbI2 can passivate perovskite by reducing ion migration. The degradation is far from uniform across different grains as revealed by secondary electron hyperspectral imaging, an advanced scanning electron microscopy technique which allows probing the composition of individual grain from the cross-section. By using potential step chronoamperometry, we also found that the bias degradation is closely related to the density of mobile ions. The unique combination of established methods with several novel analytical tools provides an insight into the origin of the bias-degradation of inverted perovskite solar cells from nano-scale to cell level, and demonstrates the potential of these novel tools for studying the degradation in other perovskite systems.
published_date 2018-12-31T03:48:44Z
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