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The thermo-optic coefficients of single phase pure and Ni doped ZnO thin films are calculated from the experimentally obtained values of their nonlinear refractive indices using Z-scan technique. The optical nonlinearity as obtained by using a cw He-Ne laser is assigned to the thermal lensing effect. The positive and negative values of the thermo-optic coefficients of the films suggest that ZnO/NiZnO/ZnO...
We report valence and conduction band offset measurements in a pulsed laser deposited Ni 0.07 Zn 0.93 O/ZnO heterostructure using X-ray photoelectron spectroscopy, valence band spectroscopy and ultraviolet visible spectroscopy. Neglecting the strain effect, the valence band offset was estimated to be 0.32 eV and the conduction band offset comes out to be −0.23 eV. Ratio between conduction...
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