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Title

Optical, structural and photo electrochemical properties of Cd<sub>1−x</sub>Zn<sub>x</sub>S films grown by chemical bath deposition.

Authors

Kumarage, W. G. C.; Wijesundera, R. P.; Seneviratne, V. A.; Jayalath, C. P.; Varga, T.; Dassanayake, B. S.

Abstract

Cd1−xZnxS (0 ≤ x ≤ 0.5) films were fabricated by chemical bath deposition method and characterized by grazing incidence X-ray diffraction (GIXRD), scanning electron microscopy (SEM), UV-visible spectroscopy and photoelectrochemical (PEC) cell. The flat-band potential value was found to be tunable from − 441 to − 664 mV with increasing Zn2 concentration in the reaction solution. GIXRD results indicate that the fabricated Cd1−xZnxS are hexagonally oriented and Zn2 is successfully introduced into CdS. SEM results indicate that high Zn2 doping concentration can form flake-like Cd1−xZnxS morphology. Furthermore, Zn2 incorporation to the CdS was found to enhance the optical absorbing capability of CdS in visible region. The optical band gap was found to vary as the composition parameter changed from x = 0.0 to x = 0.5 in the reaction solution. Best photoactive properties in the PEC exhibited for the samples grown with the deposition bath composition of x = 0.3.

Subjects

METALLIC thin films; QUANTITATIVE chemical analysis; CADMIUM compounds; OPTICAL properties of metals; METAL microstructure; CHEMICAL solution deposition

Publication

Applied Physics A: Materials Science & Processing, 2018, Vol 124, Issue 7, p1

ISSN

0947-8396

Publication type

Academic Journal

DOI

10.1007/s00339-018-1910-0

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