Publication: Diluted chemical bath deposition of CdZnS as prospective buffer layer in CIGS solar cell
Date
2021
Authors
Munna F.T.
Selvanathan V.
Sobayel K.
Muhammad G.
Asim N.
Amin N.
Sopian K.
Akhtaruzzaman M.
Journal Title
Journal ISSN
Volume Title
Publisher
Elsevier Ltd
Abstract
In this study, dilute chemical bath deposition technique has been used to deposit CdZnS thin films on soda-lime glass substrates. The structural, morphological, optoelectronic properties of as-grown films have been investigated as a function of different Zn2+ precursor concentrations. The X-ray diffractogram of CdS thin-film reveals a peak corresponding to (002) plane with wurtzite structure, and the peak shift has been observed with the increase of the Zn2+ concentration upon formation of CdZnS thin film. From morphological studies, it has been revealed that the diluted chemical bath deposition technique provides homogeneous distribution of film on the substrate even at a lower concentration of Zn2+. Optical characterization has shown that the transparency of the film is influenced by Zn2+ concentration and when the Zn2+ concentration is varied from 0 M to 0.0256 M, bandgap values of resulting films range from 2.42 eV to 3.90 eV while. Furthermore, electrical properties have shown that with increasing zinc concentration the resistivity of the film increases. Finally, numerical simulation validates and suggests that CdZnS buffer layer with composition of 0.0032 M Zn2+ concentration would be a promising candidate in CIGS solar cell. � 2020 Elsevier Ltd and Techna Group S.r.l.
Description
Buffer layers; Cadmium sulfide; Deposition; II-VI semiconductors; Lime; Solar cells; Substrates; Thin films; Zinc sulfide; Chemical bath deposition technique; Chemical-bath deposition; Homogeneous distribution; Optical characterization; Optoelectronic properties; Precursor concentration; Soda lime glass substrate; X-ray diffractograms; Zinc compounds