Structural Properties of Tio2 Thin Films Investigated for Low Cost High Efficiency Solar Cells

T Ranganayaki, M Venkatachalam, T Vasuki, S Shankar

Abstract


Research for alternate source of energy explores lot of technology in the field of material science .Harvesting UV light is immediate alternate source of energy.Composites of organic and inorganic material inferences reveals lot of inherent structural properties.  Solutions TTIP:CH3 COOH:C2 H5 OH (1.5:0.1:10) prepared by sol- gel method.

 

By changing the proportion of substances different films were obtained. Fabrication of TiO2 thin films on glass substrates can be done by Doctoral blade method. The specimens were dried at 250°c for 5minutes. The films obtained were annealed and then cooled, inheriting the high adherence to the substrates transparency, Chemical and mechanical stability. The surface morphology, film composition, structure and optical properties were evaluated from SEM, XRD. Wave length of the refractive index and absorption  co-efficient in the UV VIS-near IR regions as well as the optical band gap were inferred from optical transmittance measurements. The characteristics of the investigated thin films are interpreted in terms amorphous-crystalline phase. The obtained results were conformed with already reported values.

Keywords


Sol-gel, Film composition, Amorphous-crystalline phase.

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