|AVS 58th Annual International Symposium and Exhibition|
|Energy Frontiers Focus Topic||Wednesday Sessions|
|Session:||Thin Film Chalcogenide Solar Cells (CIGS, CZTS, CdTe and Related Materials)|
|Presenter:||M.A. Melendez-Lira, Cinvestav-IPN, Mexico|
|Authors:||L.G. Rangel-Chavez, UAM-Azcapotzalco, Mexico
M. Garcia-Aguirre, Cinvestav-IPN, Mexico
F.A. Cuevas-Ortiz, Cinvestav-IPN, Mexico
M.I. Neria-Gonzalez, Instituto Tecnologico de Estudios Superiores de Ecatepec, Mexico
M.A. Melendez-Lira, Cinvestav-IPN, Mexico
|Correspondent:||Click to Email|
The fact that the efficiency for the CdS/CdTe system has remained without any change for several years until now requires employing new approaches in order to increase it. In this work it is reported the effect on the photovoltaic characteristics of the CdS/CdTe system by employing as source of the CdS the one obtained as a by-product from bio-remediation of heavy metals in residual waters. By using a novel sulfate-reducing bacterium (Desulfovibrio alaskensis 6SR) particles of the CdS semiconductor are obtained. Structural and optical characterization by XRD, UV-vis, Raman and photoluminescence spectroscopies shown that nanoparticles of cubic CdS are obtained. The nanoparticles of cubic CdS are deposited on CdTe films by screen printing and then subject to a mild thermal treatment. It is expected that the employment of CdS with cubic rather than hexagonal crystal structure will reduce the number of defects at the CdS/CdTe interface improving the transport of minority carriers through it. We will report the effects on the spectral response and filling factor obtained for the CdS/CdTe heterostructure by employing nanostructured cubic CdS as compared to those obtained employing hexagonal CdS.
*: Work partially supported by CONACyT-Mexico.