Na incorporation into Cu(In,Ga)Se2 thin-film solar cell absorbers deposited on polyimide: Impact on the chemical and electronic surface structure

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dc.contributor.author Song, X.
dc.contributor.author Caballero, Raquel
dc.contributor.author Félix, R.
dc.contributor.author Gerlach, D.
dc.contributor.author Kaufmann, C. A.
dc.contributor.author Schock, H. W.
dc.contributor.author Wilks, R. G.
dc.contributor.author Bär, M.
dc.contributor.other UAM. Departamento de Física Aplicada es_ES
dc.date.accessioned 2014-10-06T08:41:01Z
dc.date.available 2014-10-06T08:41:01Z
dc.date.issued 2012-02-01
dc.identifier.citation Journal of Applied Physics 111.3 (2012): 034903 en_US
dc.identifier.issn 0021-8979 (print) es_ES
dc.identifier.issn 1089-7550 (online) es_ES
dc.identifier.uri http://hdl.handle.net/10486/662060
dc.description The following article appeared in Journal of Applied Physics 111.3 (2012): 034903 and may be found at http://scitation.aip.org/content/aip/journal/jap/111/3/10.1063/1.3679604 en_US
dc.description.abstract Na has deliberately been incorporated into Cu(In,Ga)Se2 (CIGSe) chalcopyrite thin-film solar cell absorbers deposited on Mo-coated polyimide flexible substrates by adding differently thick layers of NaF in-between CIGSe absorber and Mo back contact. The impact of Na on the chemical and electronic surface structure of CIGSe absorbers with various Cu-contents deposited at comparatively low temperature (420 C) has been studied using x-ray photoelectron and x-ray excited Auger electron spectroscopy. We observe a higher Na surface content for the Cu-richer CIGSe samples and can distinguish between two different chemical Na environments, best described as selenide-like and oxidized Na species, respectively. Furthermore, we find a Cu-poor surface composition of the CIGSe samples independent of Na content and - for very high Na contents - indications for the formation of a (Cu,Na)-(In,Ga)-Se like compound. With increasing Na surface content, also a shift of the photoemission lines to lower binding energies could be identified, which we interpret as a reduction of the downward band bending toward the CIGSe surface explained by the Na-induced elimination of In Cu defects. en_US
dc.description.sponsorship X.S., R.F., D.G., R.G.W., and M.B. are grateful to the Helmholtz-Association for financial support (VH-NG-423). R.F. also acknowledges the support by the German Academic Exchange Agency (DAAD; 331 4 04 002). en_US
dc.format.extent 8 pag. es_ES
dc.format.mimetype application/pdf en
dc.language.iso eng en
dc.publisher American Institute of Physics. en_US
dc.relation.ispartof Journal of Applied Physics en_US
dc.rights © 2012 American Institute of Physics. en_US
dc.subject.other Sodium en_US
dc.subject.other Surface photoemission en_US
dc.subject.other Copper en_US
dc.subject.other Photoemission en_US
dc.subject.other X-ray photoelectron spectroscopy en_US
dc.title Na incorporation into Cu(In,Ga)Se2 thin-film solar cell absorbers deposited on polyimide: Impact on the chemical and electronic surface structure en_US
dc.type article en
dc.subject.eciencia Física es_ES
dc.relation.publisherversion http://dx.doi.org/10.1063/1.3679604 es_ES
dc.identifier.doi 10.1063/1.3679604 es_ES
dc.identifier.publicationfirstpage 034903 es_ES
dc.identifier.publicationissue 3 es_ES
dc.identifier.publicationlastpage undefined es_ES
dc.identifier.publicationvolume 111 es_ES
dc.type.version info:eu-repo/semantics/publishedVersion es_ES
dc.rights.accessRights openAccess en
dc.authorUAM Caballero Mesa, Ana Raquel (264645)


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