Technical Proceedings of the 2010 Clean Technology Conference and Trade Show

Clean Technology 2010

Chapter 2: Solar & Photovoltaics

S. Shikha, D.K. Pandya, S.C. Kashyap, S. Chaudhary
IIT Delhi, IN
72 - 75
ultra thin tin oxide films, electric field, spray pyrolysis
In the present paper, deposition of good quality polycrystalline pristine SnO2 thin films (25-200 nm) at ~ 450C by a modified spray pyrolysis technique is reported.DC electric field is applied during deposition to improve growth kinetics. A comparative study has been carried out on the electrical, structural and optical properties of SnO2 films deposited on a glass substrate with and without electric field. In a typical case, the sheet conductance of 25 nm thick film is enhanced by two orders when deposited in the presence of electric field; and the crystallite size is enhances by nearly 50%. . The application of dc electric field during deposition provides additional driving force for diffusion/surface migration of the pyrolysed species, thereby improving the microstructure and hence physical properties (optical transmission and electrical conductivity). A detailed investigation of the structural, electrical and optical properties of these films will be discussed in this paper.
Growth of improved ultrathin pristine SnO2 films by electric field modified spray pyrolysis technique