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Probing the degradation and homogeneity of embedded perovskite semiconducting layers in photovoltaic devices by Raman spectroscopy / K. E. A. Hooper; H. K. H. Lee; M. J. Newman; S. Meroni; J. Baker; T. M. Watson; W. C. Tsoi

Physical Chemistry Chemical Physics, Volume: 19, Pages: 5246 - 5253

Swansea University Author: Tsoi, Chung

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DOI (Published version): 10.1039/C6CP05123E

Abstract

The key challenges for perovskite solar cells include their poor stability and film homogeneity. Studying the degradation and homogeneity of perovskite layers within device structures can be challenging but critical to the understanding of stability and effect of processing in real life conditions....

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Published in: Physical Chemistry Chemical Physics
ISSN: 1463-9076 1463-9084
Published: 2017
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URI: https://cronfa.swan.ac.uk/Record/cronfa31892
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spelling 2018-05-09T14:16:42Z v2 31892 2017-02-09 Probing the degradation and homogeneity of embedded perovskite semiconducting layers in photovoltaic devices by Raman spectroscopy Chung Tsoi Chung Tsoi true 0000-0003-3836-5139 false 7e5f541df6635a9a8e1a579ff2de5d56 d3b08934c59ae19cd53dca09a0d56734 7Pef4Kd2pzN3PQhc5ax8NtyvqZQRJmUl2lxhnzSZE7o= 2017-02-09 EEN The key challenges for perovskite solar cells include their poor stability and film homogeneity. Studying the degradation and homogeneity of perovskite layers within device structures can be challenging but critical to the understanding of stability and effect of processing in real life conditions. We show that Raman spectroscopy (RS) is a unique and powerful method (simple and fast) to probe the degradation of the perovskite film within the device structure and image perovskite formation. We demonstrate that RS can be used to directly probe chemical (PbI2) and physical (dihydrated phase) degradation of a perovskite film, and estimate the relative amount of the degradation species formed, mapping its distribution with ∼1 μm spatial resolution. This has been applied to mapping a large area perovskite module to characterise the efficacy of PbI2 to perovskite conversion. We also use RS to study the degradation species and kinetics under diverse accelerated degradation conditions (temperature and humidity) in situ. These capabilities are difficult to achieve with other methods, presenting RS as an important tool to gain understanding of the degradation and effect of processing on perovskite-based photovoltaic devices. Journal article Physical Chemistry Chemical Physics 19 5246 5253 1463-9076 1463-9084 0 0 2017 2017-01-01 10.1039/C6CP05123E College of Engineering Engineering CENG EEN None None 2018-05-09T14:16:42Z 2017-02-09T09:10:51Z College of Engineering Engineering K. E. A. Hooper 1 H. K. H. Lee 2 M. J. Newman 3 S. Meroni 4 J. Baker 5 T. M. Watson 6 W. C. Tsoi 7 0031892-09022017091200.pdf hooper2017.pdf 2017-02-09T09:12:00Z Output 837616 application/pdf AM true Published to Cronfa 09/02/2017 2018-02-02T00:00:00 false
title Probing the degradation and homogeneity of embedded perovskite semiconducting layers in photovoltaic devices by Raman spectroscopy
spellingShingle Probing the degradation and homogeneity of embedded perovskite semiconducting layers in photovoltaic devices by Raman spectroscopy
Tsoi, Chung
title_short Probing the degradation and homogeneity of embedded perovskite semiconducting layers in photovoltaic devices by Raman spectroscopy
title_full Probing the degradation and homogeneity of embedded perovskite semiconducting layers in photovoltaic devices by Raman spectroscopy
title_fullStr Probing the degradation and homogeneity of embedded perovskite semiconducting layers in photovoltaic devices by Raman spectroscopy
title_full_unstemmed Probing the degradation and homogeneity of embedded perovskite semiconducting layers in photovoltaic devices by Raman spectroscopy
title_sort Probing the degradation and homogeneity of embedded perovskite semiconducting layers in photovoltaic devices by Raman spectroscopy
author_id_str_mv 7e5f541df6635a9a8e1a579ff2de5d56
author_id_fullname_str_mv 7e5f541df6635a9a8e1a579ff2de5d56_***_Tsoi, Chung
author Tsoi, Chung
author2 K. E. A. Hooper
H. K. H. Lee
M. J. Newman
S. Meroni
J. Baker
T. M. Watson
W. C. Tsoi
format Journal article
container_title Physical Chemistry Chemical Physics
container_volume 19
container_start_page 5246
publishDate 2017
institution Swansea University
issn 1463-9076
1463-9084
doi_str_mv 10.1039/C6CP05123E
college_str College of Engineering
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hierarchy_parent_title College of Engineering
department_str Engineering{{{_:::_}}}College of Engineering{{{_:::_}}}Engineering
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description The key challenges for perovskite solar cells include their poor stability and film homogeneity. Studying the degradation and homogeneity of perovskite layers within device structures can be challenging but critical to the understanding of stability and effect of processing in real life conditions. We show that Raman spectroscopy (RS) is a unique and powerful method (simple and fast) to probe the degradation of the perovskite film within the device structure and image perovskite formation. We demonstrate that RS can be used to directly probe chemical (PbI2) and physical (dihydrated phase) degradation of a perovskite film, and estimate the relative amount of the degradation species formed, mapping its distribution with ∼1 μm spatial resolution. This has been applied to mapping a large area perovskite module to characterise the efficacy of PbI2 to perovskite conversion. We also use RS to study the degradation species and kinetics under diverse accelerated degradation conditions (temperature and humidity) in situ. These capabilities are difficult to achieve with other methods, presenting RS as an important tool to gain understanding of the degradation and effect of processing on perovskite-based photovoltaic devices.
published_date 2017-01-01T21:35:14Z
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