Effect of C/Si ratio on deep levels in epitaxial 4H-SiC
SCIE
SCOPUS
- Title
- Effect of C/Si ratio on deep levels in epitaxial 4H-SiC
- Authors
- Litton, CW; Johnstone, D; Akarca-Biyikli, S; Ramaiah, KS; Bhat, I; Chow, TP; Kim, JK; Schubert, EF
- Date Issued
- 2006-03-20
- Publisher
- AMER INST PHYSICS
- Abstract
- Changing the ratio of carbon to silicon during the epitaxial 4H-SiC growth is expected to alter the dominant deep level trap, which has been attributed to a native defect. The C/Si ratio was changed from one to six during epitaxial growth of SiC. Diodes fabricated on the epitaxial layer were then characterized using current-voltage and deep level transient spectroscopy. The single peak at 340 K (Z1/Z2 peak), was deconvolved into two traps, closely spaced in energy. The concentration of one of the Z1/Z2 traps decreased with increasing C/Si ratio. This result opposes theoretical predictions of carbon interstitial components, and supports assignment to a silicon antisite or carbon vacancy relationship. The concentration of the second component of the peak at 340 K did not depend on the C/Si ratio, which would indicate an impurity in an interstitial site.
- URI
- https://oasis.postech.ac.kr/handle/2014.oak/9508
- DOI
- 10.1063/1.2161388
- ISSN
- 0003-6951
- Article Type
- Article
- Citation
- APPLIED PHYSICS LETTERS, vol. 88, no. 12, 2006-03-20
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