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- W2088849145 abstract "Effects of molybdenum element content on electrical conductivity of ZnO sprayed thin films were investigated using the impedance spectroscopy method in the frequency ranging from 5 Hz to 13 MHz for temperature lying in 300–475 1C domain. It is observed that AC conductivity is a power law. The values of dielectric constants e1 and e2 were found to decrease with frequency and increase with temperature. The activation energy determined from the plot of both DC conductivity and the hopping frequency with 1000/T shows that the hopping conduction is the dominant mechanism. Also, experimental data of DC conductivity were analyzed using the small polaron hopping model. The impedance analysis of undoped ZnO and Mo-doped ZnO (1% and 2%) shows only one semicircle implying the response originated from a single capacitive element corresponding to the bulk grains. However, the same analysis for ZnO:Mo (3% ) shows two semicircles which proves the existence of grain boundaries. Finally, analyses of polaron hopping mechanism and Urbach tailing allow some explanations of these transport phenomena. This study shows an effective variation of electrical measurements of Mo-doped ZnO films in terms of temperature leading to possible use of such films as gas sensors." @default.
- W2088849145 created "2016-06-24" @default.
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- W2088849145 date "2014-06-01" @default.
- W2088849145 modified "2023-10-16" @default.
- W2088849145 title "Electrical measurements of dielectric properties of molybdenum-doped zinc oxide thin films" @default.
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- W2088849145 doi "https://doi.org/10.1016/j.mssp.2014.01.042" @default.
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