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Souilah, M., Lafond, A., Barreau, N., Guillot-Deudon, C. & Kessler, J. (2008) Evidence for a modified-stannite crystal structure in wide band gap Cu-poor CuIn(1-x)Ga(x)Se(2): Impact on the optical properties. Appl. Phys. Lett. 92 241923.
Added by: Laurent Cournède (2016-03-10 21:58:41) |
| Type de référence: Article DOI: 10.1063/1.2944254 Numéro d'identification (ISBN etc.): 0003-6951 Clé BibTeX: Souilah2008 Voir tous les détails bibliographiques  |
Catégories: CESES Mots-clés: chalcopyrite, solar-cells Créateurs: Barreau, Guillot-Deudon, Kessler, Lafond, Souilah Collection: Appl. Phys. Lett. |
Consultations : 1/519
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| Résumé |
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The crystal structure of high Ga-content CuIn(1-x)Ga(x)Se(2) (CIGSe) compounds has been further investigated with the help of single crystal x-ray diffraction technique. It is known that CIGSe compounds adopt the chalcopyrite crystal structure. In the case of Cu-poor, Ga-rich CIGSe, the present study shows that an alternative structure should be considered. This structure is derived from that of stannite in which there is a Ga/In segregation on two different atomic planes. The diffuse reflectance measurements of the Cu-poor compound reveal a slightly different band gap and a smoother transition compared with those of the stoichiometric compound. (C) 2008 American Institute of Physics.
Added by: Laurent Cournède |