Effect of electrode material on thermally stimulated discharge and dark current in polystyrene

Shrivastava, S. K.; Ranade, J.D.; Srivastava, A. P.

doi:10.1016/0032-3861(81)90379-7

Cited by 8 publications

(3 citation statements)

References 19 publications

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“…TSDC of polymer has become a widely used experimental technique for the investigation of various material parameters such as charge storage properties, determination of mean depth of the internal charge, activation energies of traps and trap structure of the material. It is only in recent years that the possibility of technological application of electrification of polymer due to its contact with metal has been discovered (Srivastava et al 1981). The availability of new measuring techniques such as thermally stimulated discharge current (Turnhout 1975) has freshened interest in achieving a better understanding and application of the phenomena.…”

Section: Introductionmentioning

confidence: 99%

Thermally stimulated discharge current (TSDC) and dielectric constant of semiconducting glasses

et al. 2003

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In this paper the results of thermally stimulated discharge current (TSDC) and dielectric constant for 40PbO-60Bi 2 O 3 glass thermoelectrets are presented. Measurements of TSDC and dielectric constant, ε ε′ ′, have been carried out in the temperature range 30-300°C. The thermoelectrets were prepared at different polarizing fields. The various observed peaks in the thermograms are discussed on the basis of space charge polarization. The trap energy is evaluated from the Garlick-Gibson plot of initial rise method. Similarly other parameters such as relaxation time, charge release etc are evaluated.

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Section: Introductionmentioning

confidence: 99%

Thermally stimulated discharge current (TSDC) and dielectric constant of semiconducting glasses

et al. 2003

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“…A rapid growth of interest, in recent years, in studying charge storage and transport phenomena in polymer electrets by means of techniques based on thermal stimulation has been indicated by a number of publications (Shrivastava et al 1979(Shrivastava et al , 1981Pillai et al 1981;Khare et al 1992Khare et al , 1996. The thermally stimulated depolarization current (TSDC) is a powerful technique that has provided valuable information on the charge storage and transport behaviour of many polymers (Sinha et al 1981;Keller et al 1993;Khare 1994;Khare et al 1994a, b).…”

Section: Introductionmentioning

confidence: 99%

Open- and short-circuit thermally stimulated currents in ethyl cellulose (EC): polymethyl methacrylate (PMMA) blend

1999

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Mechanisms of charge generation and its persistence in one and both-side vacuum-aluminized ethyl cellulose OEC) : polymethyl methacrylate (PMMA) blend thermoeleetrets, prepared under different fields (10, 25, 50 and 100 kV/cm) and temperatures (40, 60, 80 and 100°C), have been analysed using short-and Ol~m-circuit thermally stimulated depolarization current (TSDC) technique. The TSDCs were recorded by reheating the samples at a linear heating rate of 4°C/min. The TSDC thermograms of polyblends containing EC:PMMA in different weight ratio are, in general, characterized with two peaks in lower and higher temperature regions. However, the polarity of the peaks was found to be just opposite in short-and open-circuit TSDC measurements. Moreover, results on 97:3, 93:7 and 90:10 EC:PMMA polyblends indicated that the current increases with concentration of PMMA. The results indicate the existence of heterocharge due to dipole orientation and ionic charge drift together with the injection of charge carriers from electrodes with their subsequent localization in surface and bulk traps. Further, the chances of charge trapping in polyblends, at the interfaces are greater than in the individual polymers.

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“…The importance of carrier injection (Gutman and Lyons 1967;Koton 1968;Lampert and Mark 1970) for the explanation of electrical properties of organic solids has been long recognized. It is only in recent years that the possibility of technological application of electrification of polymers due to their contacts with metal has been discovered (Shrivastava et al 1981). The availability of new measuring techniques such as photocurrent (Wintle 1974) and thermally stimulated discharge (TSD) current (Turnhout 1975) has freshened interest in achieving a better understanding and application of the phenomena.…”

Section: Introductionmentioning

confidence: 99%

Thermally stimulated current and electrical conduction in metal (1)-ethyl cellulose-metal (1)/(2) systems

1998

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Depolarization current characteristics of solution grown pure ethyl cellulose (EC) films of about 20/tm thickness have been studied as a function of electrode materials at constant poling field (5 x 104 V/cm) and poling temperature 40°C. Thermally stimulated current (TSC) thermograms of EC consists of two well resolved peaks (located at 60°C and 140°C) for AI-AI system, which are attributed to the deorientation of strongly attached ethoxy groups of glycosidal units and diffusion of space charges either at electrodes or due to their thermal release at higher temperatures from the defect levels. For dissimilar electrode combinations (AI-Ag/Cu/Au/Sn/Pb), an indication of peak of lower magnitude at around (50-70°C) alongwith a higher temperature peak (140-155°C), have been observed. TSC parameters are found to change with the choice of electrode material. The dependence of dark current at 40°C in metal-ethyl cellulose-metal systems on applied voltage in the range (2-0-5.0)x 10 4 V/cm has also been studied. The results of current-voltage measurement on EC have been interpreted to show that the Schottky-Richardson mechanism is the controlling transport mechanism. Zero field current density extrapolated from I-E i/2 plots are found to vary with metal work function.

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Effect of electrode material on thermally stimulated discharge and dark current in polystyrene

Cited by 8 publications

References 19 publications

Thermally stimulated discharge current (TSDC) and dielectric constant of semiconducting glasses

Thermally stimulated discharge current (TSDC) and dielectric constant of semiconducting glasses

Open- and short-circuit thermally stimulated currents in ethyl cellulose (EC): polymethyl methacrylate (PMMA) blend

Thermally stimulated current and electrical conduction in metal (1)-ethyl cellulose-metal (1)/(2) systems

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