Self-assembled patches in PtSi/n-Si (111) diodes


Afandiyeva I. M., Altindal Ş., Abdullayeva L. K., Bayramova A. I.

JOURNAL OF SEMICONDUCTORS, vol.39, no.5, 2018 (ESCI) identifier identifier

Abstract

Using the effect of the temperature on the capacitance-voltage (C-V) and conductance-voltage (G/omega-V) characteristics of PtSi/n-Si (111) Schottky diodes the profile of apparent doping concentration (N-Dapp), the potential difference between the Fermi energy level and the bottom of the conduction band (V-n), apparent barrier height (phi(Bapp)), series resistance (R-s) and the interface state density N-ss have been investigated. From the temperature dependence of (C-V) it was found that these parameters are non-uniformly changed with increasing temperature in a wide temperature range of 79-360 K. The voltage and temperature dependences of apparent carrier distribution we attributed to the existence of self-assembled patches similar the quantum wells, which formed due to the process of PtSi formation on semiconductor and the presence of hexagonal voids of Si (111).