Influence of substrate temperature on the properties of spray deposited nanofibrous zinc oxide thin films

Sharmin, Mahfuza; Bhuiyan, A.H.

doi:10.1007/s00339-017-1473-5

Cited by 15 publications

(2 citation statements)

References 31 publications

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“…In addition, activation energies calculated from conductivity values at RT are given in table 3. The estimated values agree well with those reported in the literature [58][59][60][61]. It was observed that the E a values decreased with increasing frequency.…”

Section: Resultssupporting

confidence: 90%

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Temperature-dependent dielectric properties of p-n heterojunction diodes based on hydrothermally synthesized ZnO nanostructures

Çağırtekin,

Ajjaq,

Barin

et al. 2023

Phys. Scr.

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In this study, the effect of coating p-Si substrates with a pure ZnO layer using the hydrothermal reaction method on the dielectric parameters was reported. The studied dielectric properties of the ZnO/p-Si structure include dielectric constant (ε′), dielectric loss (ε″), ac electrical conductivity (σ AC), and real and imaginary electrical modulus (M′, M″). These properties were investigated using experimental capacitance-frequency (C-f) and conductivity-frequency (G-f) measurements in a frequency range of 20 Hz-1 MHz and a temperature range of 300-420 K. Experimental results show that dielectric parameters are strongly frequency- and temperature-dependent. The dielectric constant showed an increase of about 11 times in the investigated temperature range. At the same time, AC electrical conductivity increased with increasing frequency and temperature. In addition, the electrical modulus was examined, and peaks were observed in M″ values. It was observed that the peaks shifted to the high-frequency region with the increase in temperature. The activation energies were also calculated from the conductivity parameters and a decrease was observed in the activation energies as the frequency increased. Regardless of temperature and frequency, the higher dielectric loss of the fabricated diode compared to its dielectric constant can be advantageous for certain heating or electromagnetic absorption applications.

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Section: Resultssupporting

confidence: 90%

“…This is because, with increasing frequency, the jumping of charge carriers between localized states increases, as a result of which the activation energy decreases with increasing frequency. The low activation energies mean that electron-hopping conduction is the dominant conduction mechanism [57][58][59][60][61][62].…”

Section: Resultsmentioning

confidence: 99%