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Indian Journal of Pure & Applied Physics (IJPAP) >
IJPAP Vol.43 [2005] >
IJPAP Vol.43(03) [March 2005] >
| Title: | Electrical transport in solution-grown thin films of polyvinylidene fluoride |
| Authors: | Sahu, Devendra K
Khare, P K
Srivastava, R K |
| Keywords: | Transient currents
Steady state conduction
Polyvinylidene isothermal immersion technique
Dipolar orientation
Space charge |
| Issue Date: | Mar-2005 |
| Publisher: | CSIR |
| IPC Code: | H01C17/065 |
| Abstract: | The mechanism of
electrical conduction in polyvinylidene fluoride (PVDF) films sandwiched
between similar and dissimilar electrodes has been investigated in both
transient and steady state conduction modes. The thin films are of 20 m thick and obtained by the isothermal immersion technique. The
conduction process is examined in a temperature range
40-80°C, with applied dc electric fields
ranging from 10 to 100 kV/cm using both types of similar and dissimilar
electrodes systems. The nature of transient currents has mainly been attributed
to the dipolar nature in the lower temperature region where slope value m is
found to vary from 0.43 to 0.62 for similar electrode system and from 0.78 to
0.98 for dissimilar electrode combinations. The steady state conduction current
has been found to be strongly temperature dependent. The current-voltage
characteristics show two regions of conduction: ohmic conduction with a slope
of curve 0.48 to 0.68 at lower and non‑ohmic conduction with a slope 1.87 to
2.05 at higher fields. These results have been interpreted in the light of Richardson-Schottky
alongwith space charge limited (SCL) conduction transport mechanism. |
| Page(s): | 207-214 |
| ISSN: | 0975-1041 (Online); 0019-5596 (Print) |
| Source: | IJPAP Vol.43(03) [March 2005]
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