Physics Journal
Articles Information
Physics Journal, Vol.2, No.2, Mar. 2016, Pub. Date: Jan. 12, 2016
Time Optimization of Chemically Deposited Cadmium Silver Sulphide (CdAgS) Ternary Thin Films at Room Temperature
Pages: 88-95 Views: 1076 Downloads: 1501
Authors
[01] L. N. Okoli, Department of Industrial Physics, Chukwuemeka Odumegwu Ojukwu University, Uli, Anambra State, Nigeria.
[02] I. A. Ezenwa, Department of Industrial Physics, Chukwuemeka Odumegwu Ojukwu University, Uli, Anambra State, Nigeria.
[03] C. I. Elekalachi, Department of Industrial Physics, Chukwuemeka Odumegwu Ojukwu University, Uli, Anambra State, Nigeria.
[04] O. T. Okpaneje, Department of Physics Education, Federal College of Education (Technical), Umunze, Anambra State, Nigeria.
[05] V. C. Okoye, Department of Industrial Physics, Chukwuemeka Odumegwu Ojukwu University, Uli, Anambra State, Nigeria.
Abstract
Chemical bath method of thin film deposition has being successfully used to deposit thin films of Cadmium Silver Sulphide (CdAgS) at room temperature from the mixture of aqueous solutions of Cadmium chloride hemi(pentahydrate), CdCl2. 2.5H2O, Silver nitrate (AgNO3) and Thiourea, they serve as precursors for Cd2+, Ag2+ and S2-. Triethanolamine (TEA) was employed as the complexing agent while ammonium solution was used as a pH stabilizer. Deposition time as bath parameter was optimized. Five samples of Cadmium sliver sulphide films were fabricated at various time intervals of 1 hour, 2 hours, 3 hours, 4 hours and 5 hours. Optical properties of the films were studied using VU – VIS – NIR spectrophotometer within VIS and NIR regions. Micrographs of the films were taken using microphotometer. The as – grown films have low absorbance and high transmittance in VIS and NIR regions. Energy band gap of the films ranges from 1.90 eV – 2.40 eV. Micrographs of the films were analyzed using ImageJ, the average particle sizes of 94.54 nm – 723.71 nm was obtained.
Keywords
Thin Films, Chemical Bath Deposition, Optical Properties, Energy Band Gap, Micrographs
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