Chemical Bath Deposition (CBD) technique is used to deposit high quality CdS and ZnS thin films on ITO coated glass substrates. We optimized the CBD process such that the homogenous reactions are minimized. The optimal parameters enable us to maximize the quality and thickness of the deposited films. The results on CdS thin films were published in J. of Electrochemical Soc. Vol. 144, 2342 (1997).
Recently we employed similar technique to deposit ZnS thin films on glass. Zinc Sulfide thin films can be used in electroluminescent devices and solar cells. We increase the thickness of the films by 400% using ammonium salts. The results were published in Thin Solid Films, Vol. 339 148-153 (1999).
We also did a comparative study of CdS thin films deposited by several different chemical process. The results have been sent to Thin Solid Films for review now.
We also demonstrated the potential of Metal/CdTe/CdS/Cd1-xZnx structure as an alternative to the CdTe/CdS structure in photovoltaig Applications. The results have been submitted for publication.
By minimizing the hydrogen concentration in a CVD environment, we deposited nanocrystalline diamond thin films using hot filament technique. The grain size of the nanodiamond is in the range of 5 to 50 nm. The film deposited could be quite smooth. Preliminary results have been presented at the Asian CVD 99 Conference in an article entitled "Chemical Vapor Deposition of Novel Carbon Materials" in Shanghai, China, May 1999.
A more detailed article on the results are under preparation.