Ac Impedance Spectroscopy Of Al/A-Sic/C–Si(P)/Al Heterostructure under Illumination
, , , , and | Jun 17, 2014
About this article
Published Online: Jun 17, 2014
Page range: 174 - 178
Received: Oct 24, 2013
DOI: https://doi.org/10.2478/jee-2014-0027
Keywords
© Faculty of Electrical Engineering and Information Technology, Slovak University of Technology
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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.