Switching a silicon carbide (SiC) metal–oxide–semiconductor field-effect transistor between inversion and accumulation with removed drain and grounded source terminals leads to defect-assisted carrier recombination and light emission. The energy spectrum of the emitted photons provides valuable information on the involved defects, located both at the 4H-SiC/ interface and in the 4H-SiC bulk. Here, we measured and analyzed the emitted light over a broad temperature range between 12 and 297 K. Our results reveal two local maxima in light intensity around 30 and 140 K. Most importantly, the local intensity maxima and the related temperatures correlate with both the overall recombination current and gate capacitance measurements. The spectral analysis allowed us to distinguish between recombinations occurring on 4H-SiC bulk defects and 4H-SiC/ interface-related defects. We explain an initial increase of light emission with decreasing temperature to competing non-radiative pathways with activation energies of 34 and 60 meV for SiC/ interface- and 4H-SiC bulk-related emissions, respectively. Based on an extensive literature review, we link the measured photon emission to donor–acceptor pair recombination, the or the defect centers. In addition to that, we could link a prominent peak at 2.915 eV to the line of the -center. Most importantly, we conducted our own ab initio simulations revealing that recombination via -centers, previously identified with carbon dangling bonds at the 4H-SiC/ interface [Cottom et al., J. Appl. Phys. 124, 045302 (2018)], could also provide an explanation for the photon emission around 1.75 eV. Finally, our simulation of an interface-related silicon vacancy reveals a radiative transition around 2.8 eV.
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Temperature-dependent electroluminescence of a gate pulsed silicon carbide metal–oxide–semiconductor field-effect transistor: Insight into interface traps
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21 July 2023
Research Article|
July 19 2023
Temperature-dependent electroluminescence of a gate pulsed silicon carbide metal–oxide–semiconductor field-effect transistor: Insight into interface traps
Special Collection:
Semiconductor Physics: Plasma, Thermal, Elastic, and Acoustic Phenomena
M. Weger
;
M. Weger
a)
(Investigation, Methodology, Writing – original draft)
1
KAI GmbH
, Europastrasse 8, 9524 Villach, Austria
a)Author to whom correspondence should be addressed: [email protected]
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M. W. Feil
;
M. W. Feil
(Conceptualization, Investigation, Methodology, Supervision, Writing – review & editing)
2
Infineon Technologies AG
, Am Campeon 1-15, 85579 Neubiberg, Germany
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M. Van Orden
;
M. Van Orden
(Investigation, Methodology, Writing – review & editing)
1
KAI GmbH
, Europastrasse 8, 9524 Villach, Austria
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J. Cottom
;
J. Cottom
(Conceptualization, Funding acquisition, Investigation, Methodology, Supervision, Validation, Writing – review & editing)
3
University College London
, Gower Street, London, United Kingdom
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M. Bockstedte
;
M. Bockstedte
(Conceptualization, Investigation, Methodology, Supervision, Writing – review & editing)
4
Johannes Kepler University Linz
, Altenbergerstraße 69, 4040 Linz, Austria
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G. Pobegen
G. Pobegen
(Conceptualization, Funding acquisition, Investigation, Supervision, Validation, Writing – review & editing)
1
KAI GmbH
, Europastrasse 8, 9524 Villach, Austria
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M. Weger
1,a)
M. W. Feil
2
M. Van Orden
1
J. Cottom
3
M. Bockstedte
4
G. Pobegen
1
1
KAI GmbH
, Europastrasse 8, 9524 Villach, Austria
2
Infineon Technologies AG
, Am Campeon 1-15, 85579 Neubiberg, Germany
3
University College London
, Gower Street, London, United Kingdom
4
Johannes Kepler University Linz
, Altenbergerstraße 69, 4040 Linz, Austria
a)Author to whom correspondence should be addressed: [email protected]
Note: This paper is part of the Special Topic on Semiconductor Physics: Plasma, Thermal, Elastic, and Acoustic Phenomena.
J. Appl. Phys. 134, 034503 (2023)
Article history
Received:
March 29 2023
Accepted:
July 05 2023
Citation
M. Weger, M. W. Feil, M. Van Orden, J. Cottom, M. Bockstedte, G. Pobegen; Temperature-dependent electroluminescence of a gate pulsed silicon carbide metal–oxide–semiconductor field-effect transistor: Insight into interface traps. J. Appl. Phys. 21 July 2023; 134 (3): 034503. https://doi.org/10.1063/5.0152337
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