Synthesis and Characterization of Pb(S, Se)Thin Films.

1044 Words5 Pages
Studies on chemically deposited Pb(S,Se) thin films J. D. Chaudhari *, R.D. Chaudhari * *, Dr. R. H. Bari + Department of Physics, G. D. M. Arts, K. R. N. Commerce & M. D. Science College, Jamner.Pin – 424 206 Abstract : Thin films of Pb(S,Se) [lead sulfoselenide] have been prepared on glass substrate at 50°C by simple chemical bath deposition technique. The starting materials used for deposition were lead acetate, tri-sodium citrate, sodium sulphite and elemental selenium. Ammonium hydroxide solution was used to adjust pH of the bath. In order to obtain good quality thin films, time, deposition temperature and pH of the solution were optimized and they are found to be 1 hour, 50°C and 10 respectively.…show more content…
Tri-sodium citrate was used as complexing agent. Ammonium hydroxide solution was used to adjust pH of the reaction mixture. All the chemicals used were of AR grade. Good quality films obtained for optimized time, temperature of deposition and pH of solution of 1hour, 50o C and 10 respectively. The process involved the reaction of pb2+, S2- & Se2- ions in deionised water solution. Elemental selenium (99.95%) was dissolved in an aqueous solution of sodium sulphite (pH > 9) at 90o C to form a partial unstable Na2SeSO3 compound by reflux method. In order to obtain the films lead acetate was mixed with trisodium citrate. To this solution, mixture of thiourea and sodium selenosulphite was added. The grown film was washed several times with deionized water. The synthesized film was annealed in air at 350o C for 15 minutes. Structural characterization of the film was carried out with X-ray diffractometer system using CuKα radiation with wavelength 1.5418 Ao. The optical absorption study of the films was carried out using Hitachi U-2000 spectrophotometer. The electrical study of the films was carried out using four probe set up (model no.DFP-02) scientific equipment, Roorke. 3. Result: 3.1 Structural analysis Fig 1. XRD pattern of the sample Figure1 shows the diffractogram of the sample scanned in the range of 20-80o. The XRD pattern reveals that Pb(S,Se) film is polycrystalline in nature. The planes

More about Synthesis and Characterization of Pb(S, Se)Thin Films.

Get Access