Thin films of binary Bi 0 -TeO and Bi 0 -V 0 systems were prepared by the
thermal co-evaporation technique in a vacuum at room temperature. The optical
absorption edge of these systems are studied in the wavelength of 200-800 nm using
a PERKIN-ELMER uv/Vis spectrophotometer. It is found that the value of n=3/2 in
the Davis-Mott equation is best fitted for the fundamental absorption edge f...
