Optical, electrical, thermal properties of cadmium chloride doped PVA – PVP blend

Journal Article · Wed Jun 24 04:00:00 EDT 2015 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.4917901· OSTI ID:22490382

Baraker, Basavarajeshwari M.; Hammannavar, Preeti B.; Lobo, Blaise ^[1]

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1. Department of Physics, Karnatak Science College, Karnatak University, Dharwad-580001 (India)

Films of polyvinylalcohol (PVA) – polyvinylpyrrolidone (PVP) blend doped with Cadmium Chloride (CdCl{sub 2}) in the doping range 1 wt% to 40 wt% were prepared by solution casting technique. These films were characterized using optical/UV-Vis- NIR spectroscopy, Differential Scanning Calorimetry (DSC) and DC electrical measurements. The UV-Visible spectra were quantitatively analyzed to yield the optical parameters. The UV-Visible Spectra show intermediate absorption bands (before the final absorption edge) due to formation of energy bands in the forbidden gap of PVA-PVP. There is a prominent absorption band at 2.9 eV, from 0.5 wt% up to 1.8 wt% doping level (DL) caused by the dopant (CdCl{sub 2}). The DC electrical studies showed an increase in activation energy from 2.8 eV at 0.5 wt% DL up to 3.5 eV at 4.4 wt% DL, reaching a low of 2.4 eV at 11.2 wt% DL. DSC scans show evidence of formation of chain fragments, at doping levels beyond 8 wt%.

• OSTI ID: 22490382
• Journal Information: AIP Conference Proceedings, Journal Name: AIP Conference Proceedings Journal Issue: 1 Vol. 1665; ISSN APCPCS; ISSN 0094-243X
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ABSORPTION SPECTROSCOPY
ACTIVATION ENERGY
CADMIUM CHLORIDES
CALORIMETRY
DIRECT CURRENT
DOPED MATERIALS
ELECTRIC CONDUCTIVITY
EV RANGE
FILMS
NEAR INFRARED RADIATION
PVA
PVP
THERMODYNAMIC PROPERTIES
ULTRAVIOLET SPECTRA
VISIBLE SPECTRA