Influence of ZnO on optical properties and dc conductivity of vanadyl-doped alkali bismuthate glasses

A new family of glasses based on Bi2O3 was found in the systems x ZnO . (0.30 - x )M2O . 0.70Bi(2)O(3) (M = Li, Na) in the range 0.00 less than or equal to x less than or equal to 0.20 containing 2.0 mol% of V2O5 . Density, molar volume, optical band gap and dc conductivity of these glasses have been investigated. The position of the absorption edge and hence the value of the optical band gap has been reported