Preparation and Dielectric Properties of Polyvinyl Alcohol (Co, Zn Acetate) Fiber/n-Si and Polyvinyl Alcohol (Ni, Zn Acetate)/n-Si Schottky Diodes


FIBERS AND POLYMERS, vol.12, no.7, pp.886-892, 2011 (Journal Indexed in SCI) identifier identifier

  • Publication Type: Article / Article
  • Volume: 12 Issue: 7
  • Publication Date: 2011
  • Doi Number: 10.1007/s12221-011-0886-6
  • Title of Journal : FIBERS AND POLYMERS
  • Page Numbers: pp.886-892


Dielectric properties and ac electrical conductivity (sigma(ac)) of Au/PVA(Co, Zn acetate)/n-Si and Au/PVA(Ni, Zn acetate)/n-Si Schottky diodes (SDs) have been investigated in dark and under illumination by using experimental capacitance-voltage (C-V) and conductance-voltage (G/omega-V) measurements at 1 MHz and room temperature. Experimental results indicate that the change in dielectric constant (e), dielectric loss (epsilon ''), loss tangent (tan delta), the real (M') and imaginary (M '') parts of electric modulus and ac electrical conductivity (sigma(ac)) with illumination were found to change linearly with illumination level (P). On the other hand, the epsilon', epsilon '', tan delta and sigma(ac) vs P have positive slope while the M' and M '' vs P have negative slope. Such behavior of dielectric properties and sigma(ac) can be attributed to illumination induced electron-hole pairs under illumination effect in the depletion region of SDs. The obtained results under illumination suggest that these devices can be used as a sensor in optical applications.