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Thomere, A., Guillot-Deudon, C., Caldes, M. T., Bodeux, R., Barreau, N., Jobic, S. & Lafond, A. (2018) Chemical crystallographic investigation on Cu2S-In2S3-Ga2S3 ternary system. Thin Solid Films, 665 46–50.
Added by: Richard Baschera (2018-12-19 10:37:24) Last edited by: Richard Baschera (2018-12-19 10:38:32) |
| Type de référence: Article DOI: 10.1016/j.tsf.2018.09.003 Clé BibTeX: Thomere2018 Voir tous les détails bibliographiques  |
Catégories: IMN, MIOPS Créateurs: Barreau, Bodeux, Caldes, Guillot-Deudon, Jobic, Lafond, Thomere Collection: Thin Solid Films |
Consultations : 4/455
Indice de consultation : 4% Indice de popularité : 1% |
| Résumé |
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Sulfide chalcopyrites Cu(In, Ga)S-2 (CIGS) have been proposed as top cell for tandem solar devices with silicon as bottom cell. In that context, the knowledge of the Cu2S-In2S3-Ga2S3 pseudo-ternary system is of prime importance. This study presents an overall investigation of this system on the basis of a chemical crystallographic approach on bulk materials. Particular attention was paid on the copper-poor side of the so-called stoichiometric CuInS2-CuGaS2 line. Based on our investigations, it turns out that the sulfide CIGS system is much more structurally complex than the selenide Cu(In, Ga) Se-2 one (CIGSe). Especially, the adaptability of the chalcopyrite structure toward Cu deficiency is significantly lower for the sulfides than for the selenide counterparts. Correlatively, a large 2-phase domain exists between the CuInS2-CuGaS2 line and the very copper-poor region (Cu(In, Ga)(3)S-5 and Cu(In, Ga)(5)S-8). Additionally, the crystal structures of these very copper-poor compounds contain [InS6] octahedra and then are totally different than the chalcopyrite structure. These features could explain why CIGS-based-solar cells are, up to now, less efficient than the CIGSe ones.
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