Cu deficiency in multi-stage co-evaporated Cu(In,Ga)Se2 for solar cells applications / R. Caballero in Acta materialia, Vol. 58 N° 9 (Mai 2010)  

Public ISBD [article]  inActa materialia > Vol. 58 N° 9 (Mai 2010) . - pp. 3468–3476 Titre : Cu deficiency in multi-stage co-evaporated Cu(In,Ga)Se2 for solar cells applications : Microstructure and Ga in-depth alloying Type de document : texte imprimé Auteurs : R. Caballero, Auteur ; V. Izquierdo-Roca, Auteur ; X. Fontané, Auteur Année de publication : 2011 Article en page(s) : pp. 3468–3476 Note générale : Métallurgie Langues : Anglais (eng) Mots-clés : Cu content Cu(In,Ga)Se2 thin films Raman spectroscopy Scanning electron microscopy Solar cells Résumé : The objective of this work is to study the influence of the maximum Cu content during the deposition of Cu(In,Ga)Se2 (CIGSe) by multi-stage co-evaporation on the phases present in the final film, the film structure and the electrical properties of resulting solar cell devices. The variation of the composition is controlled by the Cu content in stage 2 of the deposition process. The different phases are identified by Raman spectroscopy. The in-depth Ga gradient distribution is investigated by in-depth resolved Raman scattering and secondary neutral mass spectroscopy. The morphology of the devices is studied by scanning electron microscopy. Efficiencies of 9.2% are obtained for ordered-vacancy-compound-based cells with a Cu/(In + Ga) ratio = 0.35, showing the system’s flexibility. This work supports the current growth model: a small amount of Cu excess during the absorber process is required to obtain a quality microstructure and high performance devices. DEWEY : 669 ISSN : 1359-6454 En ligne : http://www.sciencedirect.com/science/article/pii/S1359645410001072 [article] Cu deficiency in multi-stage co-evaporated Cu(In,Ga)Se2 for solar cells applications : Microstructure and Ga in-depth alloying [texte imprimé] / R. Caballero, Auteur ; V. Izquierdo-Roca, Auteur ; X. Fontané, Auteur . - 2011 . - pp. 3468–3476. Métallurgie Langues : Anglais (eng) in Acta materialia > Vol. 58 N° 9 (Mai 2010) . - pp. 3468–3476 Mots-clés : Cu content Cu(In,Ga)Se2 thin films Raman spectroscopy Scanning electron microscopy Solar cells Résumé : The objective of this work is to study the influence of the maximum Cu content during the deposition of Cu(In,Ga)Se2 (CIGSe) by multi-stage co-evaporation on the phases present in the final film, the film structure and the electrical properties of resulting solar cell devices. The variation of the composition is controlled by the Cu content in stage 2 of the deposition process. The different phases are identified by Raman spectroscopy. The in-depth Ga gradient distribution is investigated by in-depth resolved Raman scattering and secondary neutral mass spectroscopy. The morphology of the devices is studied by scanning electron microscopy. Efficiencies of 9.2% are obtained for ordered-vacancy-compound-based cells with a Cu/(In + Ga) ratio = 0.35, showing the system’s flexibility. This work supports the current growth model: a small amount of Cu excess during the absorber process is required to obtain a quality microstructure and high performance devices. DEWEY : 669 ISSN : 1359-6454 En ligne : http://www.sciencedirect.com/science/article/pii/S1359645410001072

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