Proceedings of the Materials Research Society of Korea Conference (한국재료학회:학술대회논문집)
- 2009.05a
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- Pages.34.2-34.2
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- 2009
Effect of annealing atmosphere on the properties of chemically deposited Ag2S thin films
- Pawar, S.M. (Department of Materials Science and Engineering, Chonnam National University) ;
- Shin, S.W. (Department of Materials Science and Engineering, Chonnam National University) ;
- Lokhande, C.D. (Thin Film Physics Laboratory, Department of Physics, Shivaji University) ;
- Kim, J.H. (Department of Materials Science and Engineering, Chonnam National University)
- Published : 2009.05.21
Abstract
The silver sulphide (Ag2S) thin films have been chemically deposited from an alkaline medium (pH 8 to 10) by using a silver nitrate and thiourea as a Ag and S ion precursor sources. Ethylene Damine tetraacetic acid (EDTA) was used as a complexing agent. The effect of annealing atmosphere such as Ar, N2+H2S and O2 on the structural, morphological and optical properties of Ag2S thin films has been studied. The annealed films were characterized by using X-ray diffraction (XRD), scanning electron microscopy (SEM) and optical absorption techniques for the structural, morphological, and optical properties, respectively. XRD studies reveal that the as-deposited thin films are polycrystalline with monoclinic crystal structure, is converted in to silver oxide after air annealing. The surface morphology study shows that grains are uniformly distributed over the entire surface of the substrate. Optical absorption study shows the as-deposited Ag2S thin films with band gap energy of 0.92eV and after air annealing it is found to be 2.25 eV corresponding to silver oxide thin films.