Dielectric spectroscopy studies of ZnO single crystal

Cheng, Pengfei; Li, Shengtao; Wang, Hui

doi:10.1088/1674-1056/22/10/107701

Cited by 7 publications

(2 citation statements)

References 16 publications

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“…The intersection of the curves with the Z axis at low temperatures and the arc semicircle behavior indicate the presence of both localized and non-localized conduction processes. [42][43][44][45][46] The Nyquist diagrams of the two compounds have the same behavior. Table 3 shows a comparison of the real and imaginary impedances at the same frequency and temperature for the two compounds.…”

Section: Complex Impedance Spectroscopymentioning

confidence: 96%

Effect of substitution group on dielectric properties of 4H-pyrano [3, 2-c] quinoline derivatives thin films

et al. 2016

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The AC electrical conductivity and dielectrical properties of 2-amino-6-ethyl-5-oxo-4-(3-phenoxyphenyl)-5,6dihydro-4H-pyrano[3, 2-c]quinoline-3-carbonitrile (Ph-HPQ) and 2-amino-4-(2-chlorophenyl)-6-ethyl-5-oxo-5,6-dihydro-4H-pyrano [3, 2-c] quinoline-3-carbonitrile (Ch-HPQ) thin films were determined in the frequency range of 0.5 kHz-5 MHz and the temperature range of 290-443 K. The AC electrical conduction of both compounds in thin film form is governed by the correlated barrier hopping (CBH) mechanism. Some parameters such as the barrier height, the maximum barrier height, the density of charges, and the hopping distance were determined as functions of temperature and frequency. The phenoxyphenyl group has a greater influence on those parameters than the chlorophenyl group. The AC activation energies were determined at different frequencies and temperatures. The dielectric behaviors of Ph-HPQ and Ch-HPQ were investigated using the impedance spectroscopy technique. The impedance data are presented in Nyquist diagrams for different temperatures. The Ch-HPQ films have higher impedance than the Ph-HPQ films. The real dielectric constant and dielectric loss show a remarkable dependence on the frequency and temperature. The Ph-HPQ has higher dielectric constants than the Ch-HPQ.

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Section: Complex Impedance Spectroscopymentioning

confidence: 96%

Effect of substitution group on dielectric properties of 4H-pyrano [3, 2-c] quinoline derivatives thin films

et al. 2016

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“…[1][2][3][4][5][6] ZnO nanomaterials with significantly novel and improved physical, chemical, and biological properties and functionality due to their nanoscale sizes have aroused much interest in near-UV emission, gas sensors, transparent conductor, optoelectronics, and piezoelectric application. [7][8][9][10][11][12][13] Most of the ZnO nanomaterials have been synthesized by the traditional high temperature solid state method, which is energy-consuming and difficult to control the particle properties. ZnO nanoparticles can be prepared on a large scale at low cost by simple solution-based methods, such as microemulsion synthesis, [3] sol-gel synthesis, [4] chemical precipitation, [7] and hydrothermal reaction.…”

Section: Introductionmentioning

confidence: 99%