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Photovoltaic performance of CdS/CdTe junctions on ZnO nanorod arrays

Giray Kartopu, D. Turkay, C. Ozcan, W. Hadibrata, P. Aurang, S. Yerci, H.E. Unalan, V. Barrioz, Y. Qu, L. Bowen, A.K. Gürlek, P. Maiello, R. Turan, Stuart Irvine Orcid Logo

Solar Energy Materials and Solar Cells, Volume: 176, Pages: 100 - 108

Swansea University Authors: Giray Kartopu , Stuart Irvine

Abstract

One-dimensional nanostructures, such as nanorod (NR) arrays, are expected to improve the photovoltaic (PV) response of solar cells with an ultrathin absorber due to an increased areal (junction) density and light trapping. We report on the deposition of CdS and CdTe:As semiconductor thin films on Zn...

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Published in: Solar Energy Materials and Solar Cells
ISSN: 0927-0248
Published: 2018
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URI: https://cronfa.swan.ac.uk/Record/cronfa37059
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spelling 2021-01-07T16:14:19.3686399 v2 37059 2017-11-27 Photovoltaic performance of CdS/CdTe junctions on ZnO nanorod arrays 5c4917e0a29801844ec31737672f930c Giray Kartopu Giray Kartopu true false 1ddb966eccef99aa96e87f1ea4917f1f 0000-0002-1652-4496 Stuart Irvine Stuart Irvine true false 2017-11-27 MTLS One-dimensional nanostructures, such as nanorod (NR) arrays, are expected to improve the photovoltaic (PV) response of solar cells with an ultrathin absorber due to an increased areal (junction) density and light trapping. We report on the deposition of CdS and CdTe:As semiconductor thin films on ZnO NR arrays by means of metalorganic chemical vapour deposition (MOCVD). The change in optical properties of the ZnO NRs upon the growth of CdS shell was monitored and compared to the simulated data, which confirmed the presence of strong light scattering effects in the visible and near infrared regions. The PV performance of nanostructured vs. planar CdS/CdTe solar cells (grown using the material from the same MOCVD run) showed similar conversion efficiencies (~ 4%), despite the current density being lower for the nanostructured cell due to its thicker CdS window. A clear improvement in the quantum efficiency was however observed in the near infrared region, resulting from the light trapping by the ZnO/CdS core-shell NR structure. We also showed that reduction of surface defects and use of high absorber carrier density would boost the efficiency beyond that of planar CdTe solar cells. The reported device performance and the direct observation of light trapping are promising towards optimisation of extremely-thin-absorber CdTe PV devices. Journal Article Solar Energy Materials and Solar Cells 176 100 108 0927-0248 ZnO nanorods; CdS/CdTe thin film photovoltaics; MOCVD; Light trapping 31 12 2018 2018-12-31 10.1016/j.solmat.2017.11.036 Released under a Creative Commons Attribution Non-Commercial No Derivatives License (CC-BY-NC-ND). COLLEGE NANME Materials Science and Engineering COLLEGE CODE MTLS Swansea University 2021-01-07T16:14:19.3686399 2017-11-27T09:46:52.3604451 College of Engineering Engineering Giray Kartopu 1 D. Turkay 2 C. Ozcan 3 W. Hadibrata 4 P. Aurang 5 S. Yerci 6 H.E. Unalan 7 V. Barrioz 8 Y. Qu 9 L. Bowen 10 A.K. Gürlek 11 P. Maiello 12 R. Turan 13 Stuart Irvine 0000-0002-1652-4496 14 0037059-08012018134413.pdf kartopu2017(2).pdf 2018-01-08T13:44:13.7570000 Output 1339471 application/pdf Version of Record true 2018-01-08T00:00:00.0000000 true eng
title Photovoltaic performance of CdS/CdTe junctions on ZnO nanorod arrays
spellingShingle Photovoltaic performance of CdS/CdTe junctions on ZnO nanorod arrays
Giray, Kartopu
Stuart, Irvine
title_short Photovoltaic performance of CdS/CdTe junctions on ZnO nanorod arrays
title_full Photovoltaic performance of CdS/CdTe junctions on ZnO nanorod arrays
title_fullStr Photovoltaic performance of CdS/CdTe junctions on ZnO nanorod arrays
title_full_unstemmed Photovoltaic performance of CdS/CdTe junctions on ZnO nanorod arrays
title_sort Photovoltaic performance of CdS/CdTe junctions on ZnO nanorod arrays
author_id_str_mv 5c4917e0a29801844ec31737672f930c
1ddb966eccef99aa96e87f1ea4917f1f
author_id_fullname_str_mv 5c4917e0a29801844ec31737672f930c_***_Giray, Kartopu
1ddb966eccef99aa96e87f1ea4917f1f_***_Stuart, Irvine
author Giray, Kartopu
Stuart, Irvine
author2 Giray Kartopu
D. Turkay
C. Ozcan
W. Hadibrata
P. Aurang
S. Yerci
H.E. Unalan
V. Barrioz
Y. Qu
L. Bowen
A.K. Gürlek
P. Maiello
R. Turan
Stuart Irvine
format Journal article
container_title Solar Energy Materials and Solar Cells
container_volume 176
container_start_page 100
publishDate 2018
institution Swansea University
issn 0927-0248
doi_str_mv 10.1016/j.solmat.2017.11.036
college_str College of Engineering
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hierarchy_top_title College of Engineering
hierarchy_parent_id collegeofengineering
hierarchy_parent_title College of Engineering
department_str Engineering{{{_:::_}}}College of Engineering{{{_:::_}}}Engineering
document_store_str 1
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description One-dimensional nanostructures, such as nanorod (NR) arrays, are expected to improve the photovoltaic (PV) response of solar cells with an ultrathin absorber due to an increased areal (junction) density and light trapping. We report on the deposition of CdS and CdTe:As semiconductor thin films on ZnO NR arrays by means of metalorganic chemical vapour deposition (MOCVD). The change in optical properties of the ZnO NRs upon the growth of CdS shell was monitored and compared to the simulated data, which confirmed the presence of strong light scattering effects in the visible and near infrared regions. The PV performance of nanostructured vs. planar CdS/CdTe solar cells (grown using the material from the same MOCVD run) showed similar conversion efficiencies (~ 4%), despite the current density being lower for the nanostructured cell due to its thicker CdS window. A clear improvement in the quantum efficiency was however observed in the near infrared region, resulting from the light trapping by the ZnO/CdS core-shell NR structure. We also showed that reduction of surface defects and use of high absorber carrier density would boost the efficiency beyond that of planar CdTe solar cells. The reported device performance and the direct observation of light trapping are promising towards optimisation of extremely-thin-absorber CdTe PV devices.
published_date 2018-12-31T03:58:16Z
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