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Chalcogenide Thin Films Having Nanometer Grain Size for Photovoltaic Applications

Author Affiliations

  • 1Department of Physics, Arts and Science College, Murtizapur, Dist. Akola, INDIA

Res.J.chem.sci., Volume 1, Issue (8), Pages 31-35, November,18 (2011)


Cadmium chalcogenides with appropriate band gap energy have been attracting a great deal of attention because of their potential applications in optoelectronic devices. CdS in the form of thin films is prepared at different substrate by a simple and inexpensive chemical bath deposition technique. The as deposited thin films have been characterized by XRD, SEM and Optical techniques. The XRD patterns shows that the films are polycrystalline with crystallite size 11 to 121 nm for the film deposited at optimized preparative parameters. SEM studies reveal that the grains are uniform with uneven spherically shaped, distributed over the entire surface of the substrates. FTIR spectrum shows that the percentage transmittance of the films has high transmittance in the range between 65 and 70% in the UV-VIS-NIR regions. The optical band gap energy was found to be 2.42 eV with direct allowed band-to-band transition.


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