Singh, Rajiv K. and Kumar, Jitendra and Singh, Ramadhar and Kant, Rama and Rastogi, R. C. and Chand, Suresh and Kumar, Vikram
(2006)
Structure-conductivity correlation in ferric chloride-doped poly(3-hexylthiophene).
New Journal of Physics, 8 (112).
ISSN 1367-2630
Abstract
Poly(3-hexylthiophene) (P3HT) matrix has been chemically doped (redox doping) by ferric chloride (FeCl3) with different molar concentrations to get P3HT-FeCl3 charge-transfer complexes. The effect of redox doping on photo-physical, structural, and morphological properties and dc electrical conductivity of P3HT matrices has been examined. The dc conductivity has been measured on films of pristine P3HT and P3HT-FeCl3 charge-transfer complexes in the temperature range 6-300 K. Analysis of dc conductivity data reveals that in the temperature range 40-300 K, the dc conductivity is predominantly governed by Mott's 3-dimensional variable range hopping (3D-VRH); however, below 40 K tunnelling seems to dominate. A slight deviation from 3D-VRH to 1D-VRH is observed with an increase in doping level or precisely with an increase in the extent of P3HT-FeCl3 charge-transfer complexes. We attribute this deviation to the induced expansion in crystallographic lattices as revealed by x-ray diffraction data and formation of discrete conducting domains as observed by atomic force microscope imaging.
| Item Type: |
Article
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| Additional Information: |
Copyright for this article belongs to M/s IOP Publishing.
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| Subjects: |
Physics |
| Divisions: |
UNSPECIFIED |
| Depositing User: |
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| Date Deposited: |
07 Aug 2018 09:01 |
| Last Modified: |
07 Aug 2018 09:01 |
| URI: |
http://npl.csircentral.net/id/eprint/2559 |
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