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Enhancement of the photocurrent and efficiency of CdTe solar cells suppressing the front contact reflection using a highly-resistive ZnO buffer layer

Giray Kartopu, B.L. Williams, V. Zardetto, A.K. Gürlek, Andrew Clayton Orcid Logo, S. Jones, W.M.M. Kessels, M. Creatore, Stuart Irvine Orcid Logo

Solar Energy Materials and Solar Cells, Volume: 191, Pages: 78 - 82

Swansea University Authors: Giray Kartopu, Andrew Clayton Orcid Logo, Stuart Irvine Orcid Logo

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DOI (Published version): 10.1016/j.solmat.2018.11.002

Abstract

We report on the effects of using an atomic layer deposited ZnO transparent buffer layer with > 106 Ω cm resistivity on the performance of CdZnS/CdTe solar cells grown by metalorganic chemical vapour deposition (MOCVD). The buffer film thickness is adjusted by optical modelling to suppress the re...

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Published in: Solar Energy Materials and Solar Cells
ISSN: 0927-0248
Published: Elsevier BV 2019
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URI: https://cronfa.swan.ac.uk/Record/cronfa45459
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spelling 2020-10-19T18:27:51.5894632 v2 45459 2018-11-06 Enhancement of the photocurrent and efficiency of CdTe solar cells suppressing the front contact reflection using a highly-resistive ZnO buffer layer 5c4917e0a29801844ec31737672f930c Giray Kartopu Giray Kartopu true false cdef4ab8032ae2213a97638baac8176f 0000-0002-1540-0440 Andrew Clayton Andrew Clayton true false 1ddb966eccef99aa96e87f1ea4917f1f 0000-0002-1652-4496 Stuart Irvine Stuart Irvine true false 2018-11-06 MTLS We report on the effects of using an atomic layer deposited ZnO transparent buffer layer with > 106 Ω cm resistivity on the performance of CdZnS/CdTe solar cells grown by metalorganic chemical vapour deposition (MOCVD). The buffer film thickness is adjusted by optical modelling to suppress the reflection losses at the front contact. A clear improvement, up to 1.8% in conversion efficiency, was obtained in comparison to reference devices without the ZnO buffer layer, thanks to the enhancement of the current density (Jsc) and fill factor (FF). Device spectral response showed improved collection for most of the visible region. Reflectance measurements confirmed that the ZnO film reduced the optical reflectance around the transparent front contact. This effect permitted light management through the front contact leading to an improvement of the Jsc and hence the photovoltaic conversion efficiency. These results are intriguing since the literature on CdTe solar cells did not previously report improvement to the photocurrent and device response through controlling the highly-resistive transparent buffer layer. Journal Article Solar Energy Materials and Solar Cells 191 78 82 Elsevier BV 0927-0248 ZnO, CdTe, Thin film PV, Anti-reflection, ALD, MOCVD 1 3 2019 2019-03-01 10.1016/j.solmat.2018.11.002 COLLEGE NANME Materials Science and Engineering COLLEGE CODE MTLS Swansea University 2020-10-19T18:27:51.5894632 2018-11-06T10:01:44.4310589 Faculty of Science and Engineering School of Engineering and Applied Sciences - Materials Science and Engineering Giray Kartopu 1 B.L. Williams 2 V. Zardetto 3 A.K. Gürlek 4 Andrew Clayton 0000-0002-1540-0440 5 S. Jones 6 W.M.M. Kessels 7 M. Creatore 8 Stuart Irvine 0000-0002-1652-4496 9 0045459-15112018104454.pdf kartopu2018(2).pdf 2018-11-15T10:44:54.7070000 Output 925844 application/pdf Version of Record true 2018-11-15T00:00:00.0000000 true eng
title Enhancement of the photocurrent and efficiency of CdTe solar cells suppressing the front contact reflection using a highly-resistive ZnO buffer layer
spellingShingle Enhancement of the photocurrent and efficiency of CdTe solar cells suppressing the front contact reflection using a highly-resistive ZnO buffer layer
Giray Kartopu
Andrew Clayton
Stuart Irvine
title_short Enhancement of the photocurrent and efficiency of CdTe solar cells suppressing the front contact reflection using a highly-resistive ZnO buffer layer
title_full Enhancement of the photocurrent and efficiency of CdTe solar cells suppressing the front contact reflection using a highly-resistive ZnO buffer layer
title_fullStr Enhancement of the photocurrent and efficiency of CdTe solar cells suppressing the front contact reflection using a highly-resistive ZnO buffer layer
title_full_unstemmed Enhancement of the photocurrent and efficiency of CdTe solar cells suppressing the front contact reflection using a highly-resistive ZnO buffer layer
title_sort Enhancement of the photocurrent and efficiency of CdTe solar cells suppressing the front contact reflection using a highly-resistive ZnO buffer layer
author_id_str_mv 5c4917e0a29801844ec31737672f930c
cdef4ab8032ae2213a97638baac8176f
1ddb966eccef99aa96e87f1ea4917f1f
author_id_fullname_str_mv 5c4917e0a29801844ec31737672f930c_***_Giray Kartopu
cdef4ab8032ae2213a97638baac8176f_***_Andrew Clayton
1ddb966eccef99aa96e87f1ea4917f1f_***_Stuart Irvine
author Giray Kartopu
Andrew Clayton
Stuart Irvine
author2 Giray Kartopu
B.L. Williams
V. Zardetto
A.K. Gürlek
Andrew Clayton
S. Jones
W.M.M. Kessels
M. Creatore
Stuart Irvine
format Journal article
container_title Solar Energy Materials and Solar Cells
container_volume 191
container_start_page 78
publishDate 2019
institution Swansea University
issn 0927-0248
doi_str_mv 10.1016/j.solmat.2018.11.002
publisher Elsevier BV
college_str Faculty of Science and Engineering
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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 We report on the effects of using an atomic layer deposited ZnO transparent buffer layer with > 106 Ω cm resistivity on the performance of CdZnS/CdTe solar cells grown by metalorganic chemical vapour deposition (MOCVD). The buffer film thickness is adjusted by optical modelling to suppress the reflection losses at the front contact. A clear improvement, up to 1.8% in conversion efficiency, was obtained in comparison to reference devices without the ZnO buffer layer, thanks to the enhancement of the current density (Jsc) and fill factor (FF). Device spectral response showed improved collection for most of the visible region. Reflectance measurements confirmed that the ZnO film reduced the optical reflectance around the transparent front contact. This effect permitted light management through the front contact leading to an improvement of the Jsc and hence the photovoltaic conversion efficiency. These results are intriguing since the literature on CdTe solar cells did not previously report improvement to the photocurrent and device response through controlling the highly-resistive transparent buffer layer.
published_date 2019-03-01T03:57:15Z
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