AC IMPEDANCE SPECTROSCOPY OF Al/a-SiC/c-Si(p)/Al HETEROSTRUCTURE UNDER ILLUMINATION

作者:Perny Milan*; Saly Vladimir; Vary Michal; Mikolasek Miroslav; Huran Jozef; Packa Juraj
来源:Journal of Electrical Engineering, 2014, 65(3): 174-178.
DOI:10.2478/jee-2014-0027

摘要

The amorphous silicon carbide/crystalline silicon heterojunction was prepared and analyzed. The current-voltage (I - V) measurements showed the barrier properties of prepared sample. Biased impedance spectra of Al/a-SiC/c-Si(p)/Al heterojunction under the standard illumination are reported and analyzed. AC measurements in the illuminated conditions were processed in order to identify electronic behavior using equivalent AC circuit which was suggested and obtained by fitting the measured impedance data. A phenomenon of negative capacitance/resistance in certain frequency range has been observed.