Electroreflectance of Cu₂(Cd₁-ₓ,Znₓ)SnS₄ thin film solar cells

The effect of Cu off-stoichiometry and Zn alloying on the fundamental absorption region of (CCTS) absorbers in complete solar cells has been investigated using electroreflectance (ER) spectroscopy at room temperature. It is found that ER spectra consist of contributions from two different sources, o...

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Main Authors: Levcenko, S., Hadke, Shreyash Sudhakar, Wong, Lydia Helena, Unold, T.
Other Authors: School of Materials Science and Engineering
Format: Article
Language:English
Published: 2022
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Online Access:https://hdl.handle.net/10356/160588
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Institution: Nanyang Technological University
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spelling sg-ntu-dr.10356-1605882023-07-14T16:06:43Z Electroreflectance of Cu₂(Cd₁-ₓ,Znₓ)SnS₄ thin film solar cells Levcenko, S. Hadke, Shreyash Sudhakar Wong, Lydia Helena Unold, T. School of Materials Science and Engineering Campus for Research Excellence and Technological Enterprise (CREATE) Engineering::Materials Absorber Layers Band Gap Energy The effect of Cu off-stoichiometry and Zn alloying on the fundamental absorption region of (CCTS) absorbers in complete solar cells has been investigated using electroreflectance (ER) spectroscopy at room temperature. It is found that ER spectra consist of contributions from two different sources, one of which corresponds to band gap transition in the absorber layer and the other to the interference effect in the window layer. ER measurements on CCTS samples reveal a near-constant band gap energy of 1.37-1.38 eV and a relatively small broadening of 60-90 meV in the probed compositional range, in contrast to related kesterites . The analysis of the band gap in alloys yields a quadratic dependence on Zn content with a bowing parameter of 0.4 eV. Finally, the broadening parameters of the band gap transitions as well as their compositional dependence are evaluated and discussed. National Research Foundation (NRF) Published version L.H.W. and S.H. acknowledge the funding support from the CREATE Programme under the Campus for Research Excellence and Technological Enterprise (CREATE), which is supported by the National Research Foundation, Prime Minister’s Office, Singapore. 2022-07-27T05:10:40Z 2022-07-27T05:10:40Z 2021 Journal Article Levcenko, S., Hadke, S. S., Wong, L. H. & Unold, T. (2021). Electroreflectance of Cu₂(Cd₁-ₓ,Znₓ)SnS₄ thin film solar cells. Physical Review Materials, 5(10), 104605-1-104605-6. https://dx.doi.org/10.1103/PhysRevMaterials.5.104605 2475-9953 https://hdl.handle.net/10356/160588 10.1103/PhysRevMaterials.5.104605 2-s2.0-85118154484 10 5 104605-1 104605-6 en Physical Review Materials © 2021 American Physical Society. All rights reserved. This paper was published in Physical Review Materials and is made available with permission of American Physical Society. application/pdf
institution Nanyang Technological University
building NTU Library
continent Asia
country Singapore
Singapore
content_provider NTU Library
collection DR-NTU
language English
topic Engineering::Materials
Absorber Layers
Band Gap Energy
spellingShingle Engineering::Materials
Absorber Layers
Band Gap Energy
Levcenko, S.
Hadke, Shreyash Sudhakar
Wong, Lydia Helena
Unold, T.
Electroreflectance of Cu₂(Cd₁-ₓ,Znₓ)SnS₄ thin film solar cells
description The effect of Cu off-stoichiometry and Zn alloying on the fundamental absorption region of (CCTS) absorbers in complete solar cells has been investigated using electroreflectance (ER) spectroscopy at room temperature. It is found that ER spectra consist of contributions from two different sources, one of which corresponds to band gap transition in the absorber layer and the other to the interference effect in the window layer. ER measurements on CCTS samples reveal a near-constant band gap energy of 1.37-1.38 eV and a relatively small broadening of 60-90 meV in the probed compositional range, in contrast to related kesterites . The analysis of the band gap in alloys yields a quadratic dependence on Zn content with a bowing parameter of 0.4 eV. Finally, the broadening parameters of the band gap transitions as well as their compositional dependence are evaluated and discussed.
author2 School of Materials Science and Engineering
author_facet School of Materials Science and Engineering
Levcenko, S.
Hadke, Shreyash Sudhakar
Wong, Lydia Helena
Unold, T.
format Article
author Levcenko, S.
Hadke, Shreyash Sudhakar
Wong, Lydia Helena
Unold, T.
author_sort Levcenko, S.
title Electroreflectance of Cu₂(Cd₁-ₓ,Znₓ)SnS₄ thin film solar cells
title_short Electroreflectance of Cu₂(Cd₁-ₓ,Znₓ)SnS₄ thin film solar cells
title_full Electroreflectance of Cu₂(Cd₁-ₓ,Znₓ)SnS₄ thin film solar cells
title_fullStr Electroreflectance of Cu₂(Cd₁-ₓ,Znₓ)SnS₄ thin film solar cells
title_full_unstemmed Electroreflectance of Cu₂(Cd₁-ₓ,Znₓ)SnS₄ thin film solar cells
title_sort electroreflectance of cu₂(cd₁-ₓ,znₓ)sns₄ thin film solar cells
publishDate 2022
url https://hdl.handle.net/10356/160588
_version_ 1773551320594120704