Chemically deposited ammonia-free cadmium hydroxide thin films

摘要

Polycrystalline thin films of cadmium hydroxide Cd(OH)(2) with high purity and good adhesion to the substrate were synthesized by an ammonia free chemical bath deposition method. The as-deposited films have a monoclinic crystalline structure with lattice constants a = 6.5768 angstrom, b = 10.2704 angstrom, c = 3.4125 angstrom, alpha = 90.00 angstrom, beta = 120.16 degrees, gamma = 90.00 degrees, and crystallite size 26.1 +/- 0.9 nm. The cubic phase of cadmium oxide with lattice constants a = 4.7155 angstrom and crystallite size 10.9 +/- 0.9 nm was obtained by heating the as-deposited films at 220 degrees C. The absorption bands in the 3500-3600 cm(-1) range observed in the infrared spectra of the as-deposited films were used to detect the presence Cd(OH)(2) compound. The possible ways to optimize the synthesis of Cd(OH)(2) to be used as precursor for production of chalcogenide films is discussed. (C) 2016 Published by Elsevier B.V.