Author/Authors :
R. Mendoza-Pe´rez a، نويسنده , , b، نويسنده , , J. Aguilar-Herna´ndez a، نويسنده , , J. Sastre-Herna´ndez a، نويسنده , ,
N. Ximello-Quiebras a، نويسنده , , G. Contreras-Puente a، نويسنده , , G. Santana-Rodr?´guez c، نويسنده , ,
O. Vigil-Gala´n a، نويسنده , , E. Moreno-Garc?´a a، نويسنده , , A. Morales-Acevedo d، نويسنده , , *، نويسنده ,
Abstract :
In this work, we study CdS films processed by chemical bath deposition (CBD) using different thiourea concentrations
in the bath solution with post-thermal treatments using CdCl2. We study the effects of the thiourea concentration on the
photovoltaic performance of the CdS/CdTe solar cells, by the analysis of the I–V curve, for S/Cd ratios in the CBD solution
from 3 to 8. In this range of S/Cd ratios the CdS/CdTe solar cells show variations of the open circuit voltage (Voc), the
short circuit current (Jsc) and the fill factor (FF). Other experimental data such as the optical transmittance and photoluminescence
were obtained in order to correlate to the I–V characteristics of the solar cells. The best performance of CdS–
CdTe solar cells made with CdS films obtained with a S/Cd ratio of 6 is explained in terms of the sulfur vacancies to sulfur
interstitials ratio in the CBD–CdS layers.
2006 Published by Elsevier Ltd.
