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Title: Conductivity and optical band gaps of polyethylene oxide doped with Li{sub 2}SO{sub 4} salt

The conductivity and optical properties of Li{sub 2}SO{sub 4} doped polyethylene oxide (PEO) films were studied. The polymer electrolyte films are prepared using solution casting technique. The material phase change was confirmed by X-ray diffraction (XRD) technique. Optical absorption study was conducted using UV- Vis. Spectroscopy in the wavelength range 190–1100nm on pure and doped PEO films. The direct and indirect optical band gaps were found decreased from 5.81–4.51eV and 4.84–3.43eV respectively with increasing the Li{sub 2}SO{sub 4}. The conductivity found to increases with increasing the dopant concentration due to strong hopping mechanism at room temperature.
Authors:
; ; ; ; ;  [1]
  1. Dept. of Physics, Mangalore University, Mangalagangothri-574199 (India)
Publication Date:
OSTI Identifier:
22269291
Resource Type:
Journal Article
Resource Relation:
Journal Name: AIP Conference Proceedings; Journal Volume: 1591; Journal Issue: 1; Conference: 58. DAE solid state physics symposium 2013, Patiala, Punjab (India), 17-21 Dec 2013; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; ABSORPTION; CASTINGS; DOPED MATERIALS; ELECTROLYTES; FILMS; LITHIUM SULFATES; OPTICAL PROPERTIES; POLYETHYLENE GLYCOLS; SALTS; SPECTROSCOPY; WAVELENGTHS; X-RAY DIFFRACTION