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dc.contributor.authorLevcenko, S.en_US
dc.contributor.authorHadke, Shreyash Sudhakaren_US
dc.contributor.authorWong, Lydia Helenaen_US
dc.contributor.authorUnold, T.en_US
dc.identifier.citationLevcenko, 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.
dc.description.abstractThe 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.en_US
dc.description.sponsorshipNational Research Foundation (NRF)en_US
dc.relation.ispartofPhysical Review Materialsen_US
dc.rights© 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.en_US
dc.titleElectroreflectance of Cu₂(Cd₁-ₓ,Znₓ)SnS₄ thin film solar cellsen_US
dc.typeJournal Articleen
dc.contributor.schoolSchool of Materials Science and Engineeringen_US
dc.contributor.organizationCampus for Research Excellence and Technological Enterprise (CREATE)en_US
dc.description.versionPublished versionen_US
dc.subject.keywordsAbsorber Layersen_US
dc.subject.keywordsBand Gap Energyen_US
dc.description.acknowledgementL.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.en_US
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