Modeling of Ag+ mobility in AgI by space charge depolarization process
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A mathematical modeling of mobility of Ag+ ion in AgI is presented. In the model, regime is space charge polarized initially by applying a fixed d.c. field of ∼0.5 V across the sample, sandwiched between two electronically conducting graphite electrodes. The depolarization potential is recorded at various isothermal conditions in the temperature range 300–535 K. By considering open-circuit condition (where the sum of all current densities, i.e., drift current density, trapped current density, and displacement current density, is vanished), ionic drift- and trap-modulated mobilities are modeled. Result obtained through this model is compared with the ionic mobility, measured by conventional transient ionic current technique in the same temperature range.
KeywordsModeling Space charge depolarization Mobility Current density Transient ionic current
The authors are grateful to Shri I.P. Mishra, President of Gangajali Education Society, and Dr. P. B. Deshmukh, Director of Shri Shankaracharya College of Engineering and Technology, for their valuable cooperation during the work.
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