Structural, Optical and Surface Properties of CdTe Thin Films on CdS/FTO Glass Substrates
CdTe thin film materials were deposited on CdS/FTO glass substrate using vacuum evaporation technique The sample was characterized using X-ray diffraction (XRD), UV-VIS-NIR spectroscopy and scanning electron microscopy (SEM) techniques. XRD studies revealed that the sample was polycrystalline in nature. The SEM image showed that the sample is columnar in structure and the grains are uniform. Optical band gap of the CdTe thin film was estimated from transmittance and reflectance data and it was found 1.52 to 1.54 eV. The band gap, high absorption co-efficient, polycrystalline nature and surface image showed that thermal evaporation is suitable for deposition of CdTe absorber layer on CdS/FTO glass substrate.
K. M. A. Hussain, Z. H. Mahmood, Ishtiaque M Syed, T. Begum, T. Faruqe, and J. Parvin, “Thermal vacuum deposition of cadmium telluride thin films solar cell material.” American Journal of Materials Science and Application, 2 No. 6 (2014) 91-95.
A.M.D. Ede, E.J. Morton, P. DeAntonis, Thin film CdTe for imaging detector applications. Nuclear Instruments and Methods in Physics Research A 458 (2001) 7-11.
Katlander, J., Bargholtz, Chr, Batres-Estrada, G. and Behrooz, K.” Development of Methods to Use CdTe Detectors in Field Measurements”, Journal of Physics Conference Series, 41 (2006) 523-526.
Lovergine, N., Prete, P., Tapfer, L., Marzo, F. and Mancin, A. I.,” Hydrogen Transport Vapor Growth and Properties of Thick CdTeEpilayers for RT X-ray Detector Applications”, Cryst Res Tech. 40 (2005) 1018-1023.
K. M. A. Hussain, T. Faruqe, J. Parvin, S Ahmed, Z. H. Mahmood & Ishtiaque M. Syed, “Study of CdTe Nuclear Detector Material In Thin Film Form Using Thermal Evaporation Method, Malaysian Journal of Medical and Biological Research (MJMBR), 2 No. 3 (2015) 195-199.
K. M. A. Hussain, T. Begum, Z. H. Mahmood, Ishtiaque M. Syed, S. Ahmed, “Study of thermally deposited CdS thin films for CdTe thin film solar cell application”, International Journal of Nanoscience and Nanoengineering. 1 No. 2 (2014) 34-38.
Laxman Gouda, Yelameli Ramesh Aniruddha, Sheela K. Ramasesha, Correlation between the Solution Chemistry to Observed Properties of CdTe Thin Films Prepared by CBD Method. Journal of Modern Physics, 3 (2012) 1870-1877.
A. Romeo, D. L. Batzner, H. Zogg, C. Vignali", A. N. Tiwari. Influence of CdS growth process on structural and photovoltaic properties of CdTe/CdS solar cells Solar Energy Materials & Solar Cells, 67 (2001) 311-321.
B. Hymavathi, B. Rajesh Kumer, T. Subba Rao. Invettigations of optoelectronic properties of DC reactive magnetron sputtered CdTe thin films. Chalcogenide Letters, 10- 6 (2013) 209–216.
E. R. Shaaban, N. Afify, A. El-Taher, Effect of film thickness on microstructure parameters and optical constants of CdTe thin films. Journal of Alloys and Compounds, 482 (2009) 400–404.
S. S. Patil and P. H. Pawer. “ Effects of thickness on the structural and optical properties of thermally evaporated CdTe thin films, J. Chemical, Biological and Physical Sciences, 2 No. 2 (2012) 968-978.
S. Chandramohan, R. Sathyamoorthy, P. Sudhagar, D. Kanjilal, D. Kabiraj, K. Asokan,Structural and photoluminescence properties of swift heavy ion irradiated CdS thin films. Thin Solid Films, 516 (2008) 5508-5512.
Mott M. and Davis E. Electronic Process in Non-Crystalline Materials. 2nd ed. University Press Oxford, 1979.