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Mg-doped CdS films prepared by chemical bath deposition. Optical and electrical properties
Authors
FELIPE CABALLERO BRIONES
O. CALZADILLA
+3 more
FABIO FELIPE CHALÉ LARA
J.L. PEÑA
V. REJON
Publication date
29 July 2015
Publisher
Instituto Politécnico Nacional (IPN)
Abstract
Mg-doped CdS thin films were prepared onto glass substrates by the chemical bath deposition method increasing Mg2+ contents in the chemical bath. Film composition was studied by X-ray photoelectron spectroscopy. The physical properties of the films such as the lattice parameter, crystallite size and crystal structure were studied by X-ray diffraction and the film morphology was examined by atomic force microscopy. XPS results indicate an incorporation of up to 0.27 at. %. X-ray diffraction showed that films occur primarily in the hexagonal phase. The band gap increased with the Mg2+ added to the bath. The film resistance reduced with the Mg doping and an increased photocurrent response was observed under illumination. Using photocurrent sensing atomic force microscopy (PCAFM) in selected samples, an increasing photocurrent response was measured in the grain boundaries. I-V curves in PCAFM indicate n-type doping character. © 2015, National Institute R and D of Materials Physics. All rights reserved
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Last time updated on 03/09/2019