Silvaco-based electrothermal simulation of 10 kV 4H-SiC PI-N diode under pulsed condition

B. Pushpakaran, S. Bayne, A. Ogunniyi

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review


The application of silicon carbide technology in p-i-n diode has facilitated the development of p-i-n rectifiers up to several kV blocking voltage with a much thinner drift region thickness as compared to its silicon counterpart. This research focuses on the 2D electrothermal simulation of a 10 kV 4H-SiC p-i-n diode model developed using Silvaco ATLAS software. The p-i-n diode structure was designed for 100 A/cm2 forward current density with a cell pitch of 16 μm and an active area of 10 μm2 Physics-based models were included to account for low-field mobility, carrier-carrier scattering, carrier generation-recombination, avalanche breakdown, and lattice heating. The device model was simulated under steady state and transient conditions. Pulsed simulation of the p-i-n diode was carried out using an RLC ring down circuit to generate a 5 μs wide pulse with peak current densities up to 5000 A/cm2. The reverse recovery characteristics of the diode was analyzed for a forward current density of 100 A/cm2 and varying turn-OFF dJ/dt to assess the limitation on usable switching frequency. Lattice temperature profile of the p-i-n diode was generated by including heat generation models during transient simulation to identify thermal hot spot formation and areas of possible failure during pulsed operation.

Original languageEnglish
Title of host publication2017 IEEE 21st International Conference on Pulsed Power, PPC 2017
PublisherInstitute of Electrical and Electronics Engineers Inc.
ISBN (Print)9781509057481
StatePublished - Feb 13 2018
Event21st IEEE International Conference on Pulsed Power, PPC 2017 - Brighton, United Kingdom
Duration: Jun 18 2017Jun 22 2017

Publication series

NameIEEE International Pulsed Power Conference
ISSN (Print)2158-4915
ISSN (Electronic)2158-4923


Conference21st IEEE International Conference on Pulsed Power, PPC 2017
Country/TerritoryUnited Kingdom


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