Journal
IEEE SENSORS JOURNAL
Volume 19, Issue 5, Pages 1640-1644Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/JSEN.2018.2883544
Keywords
High temperature limit; Schottky diode; temperature sensor; thermal sensitivity; wide bandgap semiconductor
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We developed a simplified theoretical model for parameters calculation of diode temperature sensors (DTS) based on Schottky diodes (SD). The current flow mechanism of the diodes considered was dominated by over-barrier thermionic emission. Qualitative correlations between basic fundamental and electrophysical parameters of such DTS were established. The expressions for ultimate high-temperature parameters of the DTS were obtained. Theoretical results obtained were approved using the test samples of DTS with Schottky contact Ni/n-SiC (4H). It was shown that physical high-temperature limit of operation of such a DTS (>1250 K) exceeded the values of commercial DTS based on Si, GaAs, and AlGaAs p-n junctions. And the SD-based DTS itself demonstrated significantly lower energy consumption.
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