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Characterization of PbS thin films obtained by chemical bath at low temperature using sodium citrate as complexing agent

Published online by Cambridge University Press:  23 May 2016

David Ramírez-Ceja ,
Luis A. González ,
José Escorcia-García  and
Arturo I. Martínez-Enríquez
David Ramírez-Ceja
Affiliation:
Centro de Investigación y de Estudios Avanzados del IPN, Unidad Saltillo, Av. Industria Metalúrgica 1062, Parque Industrial, Ramos Arizpe 25900, Coahuila, México.
Luis A. González*
Affiliation:
Centro de Investigación y de Estudios Avanzados del IPN, Unidad Saltillo, Av. Industria Metalúrgica 1062, Parque Industrial, Ramos Arizpe 25900, Coahuila, México.
José Escorcia-García
Affiliation:
Centro de Investigación y de Estudios Avanzados del IPN, Unidad Saltillo, Av. Industria Metalúrgica 1062, Parque Industrial, Ramos Arizpe 25900, Coahuila, México.
Arturo I. Martínez-Enríquez
Affiliation:
Centro de Investigación y de Estudios Avanzados del IPN, Unidad Saltillo, Av. Industria Metalúrgica 1062, Parque Industrial, Ramos Arizpe 25900, Coahuila, México.
*
*(Email: luis.gonzalez@cinvestav.edu.mx)
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Abstract

The deposition of PbS thin films by the chemical bath deposition method using sodium citrate as non-toxic complexing agent is presented. As-deposited PbS films and those annealed at 200 and 300 °C in argon atmosphere were formed by tightly compact spherical particles homogeneously distributed along the substrates. The XRD analysis shows that all the films had a galena type cubic crystalline structure. The crystallite size of the as-deposited film was 17 nm which decreased to 14 nm when the film was annealed to 300 °C. Thermal treatments to the films produced a shift of the optical band gap from 1.34 to 1.49 eV. Furthermore, the as-deposited PbS films were photosensitive showing a conductivity of 10-2 Ω-1 cm-1 under illumination. Such a conductivity increased to 10-1 Ω-1 cm-1 with the thermal treatment at 200 °C. The evaluation of the PbS film using a CdS thin film partner as window in the solar cell configuration showed an open circuit voltage of 88 mV and a short current density of 3.5 mA/cm2.

Keywords

thin filmsemiconductingchemical composition
Type
Articles
Information
MRS Advances , Volume 1 , Issue 37: Nanotechnology , 2016 , pp. 2623 - 2628
Copyright
Copyright © Materials Research Society 2016 

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References

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