RAJEEV KUMAR
Journal of Polymer Materials, Vol.37, No.3-4, pp. 131-142, 2020, DOI:10.32381/JPM.2020.37.3-4.2
Abstract The optical, electrical and acoustical properties of a polymer solution based on polyvinyl
pyrrolidone (PVP) doped with different concentration of cupric sulphate (CuSO4
) were studied.UVVIS spectroscopy results reflected that absorption increases in asymmetric manner and the
absorption peak showed red shift with increasing Cu ions concentration. The optical band gap
(direct and indirect) was found to decrease with increase in Cu ions concentration in the polymer
due to increase in the density of localized states in the band-gap.The value of Urbach energy is
also evaluated from the transmission spectra and the activation energies are also evaluated
from the conductivity… More >
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