Effect of Na concentrations on microstructure and optical properties of ZnO films

Abstract

Na-doped ZnO thin films were deposited on the glass substrates using sol-gel method. The effect of Na concentrations on the structural and optical properties of ZnO films was studied. As Na concentration increases from 0.0 at% to 16.0 at%, preferential c-axis orientation becomes more and more obvious, and the intensity of the diffraction peaks from (103) increases. The optical band gap E g value increases from 3.261 to 3.286 eV first and then decreases as Na concentration increases from 0.0 to 2.0 at% and then beyond 2.0 at%. The intensity of all the emissions increases with increasing Na concentration and the origins of the violet emission (wavelength in the 400-407 nm) and the blue emission (wavelength at 473 nm) were discussed in detail.

Enhancing the Thermal Stability and Reducing the Resistance Drift of Sb Phase Change Films by Adding In2Se3 Interlayers

“…where λ is the X-ray wavelength, β is the peak width at the semi-maximum, and θ is the diffraction angle [26]. The grain size of the [IS(4 nm)/Sb(6 nm)] 20 film after annealing at 142 • C is 7.806 nm.…”