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Epitaxial growth of heavily doped n+-Ge layers using metal-organic chemical vapor deposition with in situ phosphorus doping

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Publication date: Available online 10 October 2017
Source:Thin Solid Films
Author(s): Shinichi Ike, Wakana Takeuchi, Osamu Nakatsuka, Shigeaki Zaima
We report the epitaxy of n-Ge layer with in situ phosphorus (P)-doping using metal-organic chemical vapor deposition (MOCVD) method with tertiary-butyl-germane and tri-ethyl-phosphine precursors. The crystalline and electrical properties of n-Ge epitaxial layers have been investigated using X-ray diffraction, atomic force microscopy, and Hall effect measurements in detail. In situ P-doping with MOCVD demonstrates the incorporation of P in Ge as high as 1×1020 cm3. The electron concentration in P-doped Ge epitaxial layers are achieved as high as 1.7×1019, 1.8×1019, and 2.2×1018 cm3 at growth temperatures of 400, 350, 320°C, respectively.


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