Temperature dependence of electrical properties of non‐doped and nitrogen‐doped beta‐SiC single crystals grown by chemical vapor deposition
作者:
Akira Suzuki,
Atsuko Uemoto,
Mitsuhiro Shigeta,
Katsuki Furukawa,
Shigeo Nakajima,
期刊:
Applied Physics Letters
(AIP Available online 1986)
卷期:
Volume 49,
issue 8
页码: 450-452
ISSN:0003-6951
年代: 1986
DOI:10.1063/1.97112
出版商: AIP
数据来源: AIP
摘要:
Electrical properties of non‐doped and nitrogen‐dopedn‐type &bgr;‐SiC films grown on Si substrates have been investigated at 70–1000 K. Those of non‐doped films remarkably depend on the Si/C ratio of the source gases. The highest mobilities of non‐doped films are 510 and 1330 cm2 V−1 s−1at 296 and 71 K, respectively. The carrier concentrations are as low as 6×1016cm−3even at 1000 K. Ionization energies of 34 –37 meV for nitrogen donors and 19–25 meV for unknown donors of non‐doped films are obtained. Mobilities of both non‐doped and nitrogen‐doped films are dominated by lattice scattering at high temperatures and by impurity scattering at low temperatures. Nitrogen donors strongly affect the impurity scattering.
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