Optical properties of zno films prepared by cbd technique

Abstract

Thin films of zinc oxide (ZnO) with ammonia solution to 300ml of aqueous solution Zn(NO3)2. 6H2O (0.3M) are created via (CBD) technique on commercial glass substrates with bath temperature (80 ± 5)°C and annealing temperatures at (373, 473 and 573)K at constant time of 1h. The deposited films optical absorbance was defined utilizing SP-3000NANO optima (UV-V is spectrophotometer) and shows that the optical energies gaps for ZnO films increase slightly through a rise in temperature of annealing of the samples at 373K and 473K and register around 3.77eV and 3.78eV respectively. While the energy gap decreases to 3.73eV with increase the annealing temperature at 573K. The wide band gap ZnO has applications of wide array in areas include solar cells, light conductors, chemical sensors and ultraviolet laser diodes.