Temperature dependent current-voltage (I-V) characteristics of Au/n-Si (111) Schottky barrier diodes (SBDs) with polyvinyl alcohol (Co, Ni-Doped) interfacial layer

Abstract

Current-voltage (I-V) characteristics of Au/PVA(Co,Ni-doped)/n-Si (111) SBDs have been investigated in the temperature range of 280-400 K. The zero-bias barrier height (Phi(bo)) and ideality factor (n) determined from the forward bias 1 V characteristics were found strongly depend on temperature. The forward bias semi-logarithmic I-V curves for the different temperatures have an almost common cross-point at a certain bias voltage. While the value of n decreases, the Phi(Bo) increases with increasing temperature. Therefore, we attempted to draw a Phi(bo) vs q/2kT plot to obtain evidence of a Gaussian distribution of the barrier heights, and to calculate the values of mean barrier height and standard deviation at zero bias, respectively.