Wüest M. 51 Wykes M. 82 Yamaguchi M. 17 Ybarra G. 129 Yubero F ...
Wüest M. 51 Wykes M. 82 Yamaguchi M. 17 Ybarra G. 129 Yubero F ...
Wüest M. 51 Wykes M. 82 Yamaguchi M. 17 Ybarra G. 129 Yubero F ...
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JUNE 28 WEDNESDAY AFTERNOON<br />
RIVA-TF-WeA-P.6 AgInTe 2 CHALCOPYRITE THIN FILMS OBTAINED BY<br />
ELECTRODEPOSITION TECHNIQUES AND ANNEALING. R. Díaz, F. Rueda Dpto. Física<br />
Aplicada Universidad Autónoma de Madrid, 28049 Madrid, Spain. P.Herrasti, E. Vazquez Dpto. Química<br />
Física Aplicada Universidad Autónoma de Madrid, 28049 Madrid, Spain. M. Abd el Lefdil Dpt<br />
de Physique, Université de Rabat, Maroc<br />
In order to obtain single phase thin films of the system Ag-In-Te for thin film solar cell applications,<br />
electrodeposition techniques followed by a baking in Te atmosphere were used. For the formation of the<br />
precursor films three alternative processes were followed, 1t) the co-electrodeposición of Ag and In, 2d)<br />
a layer of Ag with an overlayer of InTe and 3d) a layer of Ag and an overlayer of In. The vacuum<br />
annealing were done with a source of Te metal close to the films that allowed to crystallize into ternary<br />
chalcopyrite phase the as deposited amorphous films. Bath compositions, deposition potentials and<br />
deposition times have been changed to obtain the precursor thin films on substrates of molybdenum<br />
supported by glass. In order to determine the optical properties, SnO 2 coated substrates were also used.<br />
The single phase films are obtained by further annealing in Te atmosphere in the 250-400 o C range with<br />
different cooling profiles. This annealing strongly affects the Te concentration as well as the In/Ag<br />
atomic ratio and the number of phases. Single chalcopyrite phase has been obtained for specific<br />
annealing conditions and is related to Te concentration.<br />
Composition and X-ray studies have been carried out and several phases of AgInTe 2 and In-rich<br />
Telluride chalcopyrites have been found. The film morphology and unit cell parameters for single<br />
phase samples depend strongly on the composition in the annealed samples.<br />
The support of contract No CTQ2005-04469/BQU is acknowledged<br />
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