Structural,Optical and Electrical properties of nano structured flower like ZnO thin films by CBD

R Radhika

Abstract


Investigations on the effect of annealing temperature on the structural, optical, electrical properties and morphology of nano structured ZnO thin films deposited on glass substrate by chemical bath deposition have been carried out. X- ray diffraction studies revealed that deposited films are in crystalline nature with Hexagonal structure along the prominent crystallographic plane. Such as crystalline size, dislocation density, and micro strain were calculated. The UV- Visible spectroscopy studies revealed that all the films have high optical transmittance (>60%) in the visible range. The optical band gap values are in the range of 3.23-3ev. The films have increased transmittance with increase of heat treatment. Scanning electron microscope images revealed that the flower like shaped grains that occupy the entire range of several nm in size. The electrical conductivity of ZnO thin film is determined by using Four probe method. The electrical conductivity of ZnO thin film increases with the increase of annealing temperature.


Keywords


ZnO, Chemical bath deposition, XRD, UV, SEM, EDAX analysis, Electrical property.

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