✦ LIBER ✦
Nanocrystalline ZnS dispersed in polymer electrolyte (PEO :NH4I): Preparation and electrical conductivity measurements
✍ Scribed by P.K. Singh; Rana Pratap; Amreesh Chandra
- Publisher
- Elsevier Science
- Year
- 2002
- Tongue
- English
- Weight
- 425 KB
- Volume
- 44
- Category
- Article
- ISSN
- 0960-8974
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✦ Synopsis
Nano-composites of a polymer electrolyte PEO:NHJ (80:20) have been prepared by dispersing nano-size ZnS crystallites in it. The measured band gap of dispersed ZnS is -3.9 eV and its particle size as estimated from the XRD linewidths is _ 11 nm. Detailed I-V and polarisation studies show that the composite polymer film is a mixed (ionic+electronic) conductor and that the dispersoid ZnS is n-type. The total electrical conductivity Vs composition studies show two peaks at the ZnS concentrations of 4 and lOwt% which can be qualitatively explained on the basis of two-percolation threshold model.