Abstract
Nitrogen is the most important shallow donor impurity in SiC and the ionization energy is lower in the 4H polytype compared to 6H-SiC. Dependent on the lattice site the activation energy is in the 60 meV range for the hexagonal site and is twice as high for the cubic site [2]–[5]. Highly conducting 4H-SiC substrates of high crystalline quality are one of the most important prerequisites for power electronic devices. The specific resistance should be as low as possible and n-type resistivities lower than 10 mΩcm have been reported for both 6H- and 4H-SiC [1].
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Rost, HJ., Schulz, D., Siche, D. (2004). High Nitrogen Doping During Bulk Growth of SiC. In: Choyke, W.J., Matsunami, H., Pensl, G. (eds) Silicon Carbide. Advanced Texts in Physics. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-18870-1_7
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DOI: https://doi.org/10.1007/978-3-642-18870-1_7
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