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Raman scattering analysis of Cu-poor Cu(In,Ga)Se2 cells fabricated on polyimide substrates: Effect of Na content on microstructure and phase structure

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Title: Raman scattering analysis of Cu-poor Cu(In,Ga)Se2 cells fabricated on polyimide substrates: Effect of Na content on microstructure and phase structure
Authors: Izquierdo-Roca, V.1, Caballero, R.2, Fontané, X.3, Kaufmann, C.A.2, Álvarez-García, J.4, Calvo-Barrio, L.5, Saucedo, E.3, Pérez-Rodríguez, A.1,3 aperezr@irec.cat, Morante, J.R.1,3, Schock, H.W.2
Source: Thin Solid Films. Aug2011, Vol. 519 Issue 21, p7300-7303. 4p.
Subjects: Copper indium selenide, Raman effect, Solar cells, Polyimides, Microstructure, Phase transitions, Molecular structure, Sodium, Crystal growth, Auger electron spectroscopy
Abstract: Abstract: This work reports the Raman scattering surface and in-depth resolved analysis of Cu-poor Cu(In,Ga)Se2 (CIGS) grown on polyimide substrates. In order to study the effect of Na on the formation and microstructure of the CIGS and the corresponding Cu-poor ordered vacancy compound (OVC) phases, a NaF precursor layer with different thicknesses was deposited on the Mo-coated substrates before growing of the samples. The Raman spectroscopy data are correlated with the analysis of the samples by Auger electron spectroscopy and scanning electron microscopy. These data corroborate the significant role of Na on the inhibition of Ga–In interdiffusion and on the formation of the MoSe2 interfacial phase at the back region of the layers. Presence of Na also leads to an enhancement in the formation of the chalcopyrite CIGS phase and a decrease in the occurrence of the dominant OVC phase at the surface region. This study confirms the strong dependence of the microstructure and phase distribution in CIGS absorber layers on the Na available during their growth. [Copyright &y& Elsevier]
Copyright of Thin Solid Films is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
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  Data: Raman scattering analysis of Cu-poor Cu(In,Ga)Se<subscript>2</subscript> cells fabricated on polyimide substrates: Effect of Na content on microstructure and phase structure
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  Data: <searchLink fieldCode="JN" term="%22Thin+Solid+Films%22">Thin Solid Films</searchLink>. Aug2011, Vol. 519 Issue 21, p7300-7303. 4p.
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  Data: <searchLink fieldCode="DE" term="%22Copper+indium+selenide%22">Copper indium selenide</searchLink><br /><searchLink fieldCode="DE" term="%22Raman+effect%22">Raman effect</searchLink><br /><searchLink fieldCode="DE" term="%22Solar+cells%22">Solar cells</searchLink><br /><searchLink fieldCode="DE" term="%22Polyimides%22">Polyimides</searchLink><br /><searchLink fieldCode="DE" term="%22Microstructure%22">Microstructure</searchLink><br /><searchLink fieldCode="DE" term="%22Phase+transitions%22">Phase transitions</searchLink><br /><searchLink fieldCode="DE" term="%22Molecular+structure%22">Molecular structure</searchLink><br /><searchLink fieldCode="DE" term="%22Sodium%22">Sodium</searchLink><br /><searchLink fieldCode="DE" term="%22Crystal+growth%22">Crystal growth</searchLink><br /><searchLink fieldCode="DE" term="%22Auger+electron+spectroscopy%22">Auger electron spectroscopy</searchLink>
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  Label: Abstract
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  Data: Abstract: This work reports the Raman scattering surface and in-depth resolved analysis of Cu-poor Cu(In,Ga)Se2 (CIGS) grown on polyimide substrates. In order to study the effect of Na on the formation and microstructure of the CIGS and the corresponding Cu-poor ordered vacancy compound (OVC) phases, a NaF precursor layer with different thicknesses was deposited on the Mo-coated substrates before growing of the samples. The Raman spectroscopy data are correlated with the analysis of the samples by Auger electron spectroscopy and scanning electron microscopy. These data corroborate the significant role of Na on the inhibition of Ga–In interdiffusion and on the formation of the MoSe2 interfacial phase at the back region of the layers. Presence of Na also leads to an enhancement in the formation of the chalcopyrite CIGS phase and a decrease in the occurrence of the dominant OVC phase at the surface region. This study confirms the strong dependence of the microstructure and phase distribution in CIGS absorber layers on the Na available during their growth. [Copyright &y& Elsevier]
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  Data: <i>Copyright of Thin Solid Films is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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        Value: 10.1016/j.tsf.2010.12.177
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      – SubjectFull: Raman effect
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