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Hamdi, M., Lafond, A., Guillot-Deudon, C., Hlel, F., Gargouri, M. & Jobic, S. (2014) Crystal chemistry and optical investigations of the Cu2Zn(Sn,Si)S-4 series for photovoltaic applications. J. Solid State Chem. 220 232–237.
Added by: Laurent Cournède (2016-03-10 21:01:54) |
| Type de référence: Article DOI: 10.1016/j.jssc.2014.08.030 Numéro d'identification (ISBN etc.): 0022-4596 Clé BibTeX: Hamdi2014 Voir tous les détails bibliographiques  |
Catégories: MIOPS Mots-clés: crystal structure, czts, diffraction, effective ionic-radii, kesterite, photovoltaics, Solid solution, stannite, thin-films Créateurs: Gargouri, Guillot-Deudon, Hamdi, Hlel, Jobic, Lafond Collection: J. Solid State Chem. |
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| Résumé |
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Different compounds in the Cu2ZnSnS4-Cu2ZnSiS4 system have been prepared via ceramic route and structurally characterized via X-ray diffraction on powders and single crystals. Two solid solutions were identified along the Cu2Zn(Sn,Si)S-4 series. Namely, materials with Si-content x=Si/(Sn+Si) lower than 0.5 crystallize with the Cu2ZnSnS4 kesterite structure type while materials with x higher than 0.8 adopt the Cu2ZnSiS4 enargite structure type. In between, a miscibility gap occurs where the Cu2ZnSn0.5Si0.5S4 and Cu2ZnSn0.2Si0.8S4 compounds co-exist. The optical bandgap increases continuously with the Si content in the whole series. This opens up the possibility to fine tune the absorption threshold and to adjust it to 1.7 eV for x similar to 0.5, the optimum value for the top cell of tandem solar devises to achieve high photovoltaic conversion efficiency. (C) 2014 Elsevier Inc. All rights reserved.
Added by: Laurent Cournède |