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题名: The difference of Si doping efficiency in GaN and AlGaN in GaN-based HBT structure
作者: Ran, JX;  Wang, XL;  Hu, GX;  Li, JP;  Wang, JX;  Wang, CM;  Zeng, YP;  Li, JM
出版日期: 2006
会议日期: SEP 18-22, 2005
摘要: An AlGaN/GaN HBT structure was grown by low-pressure metalorganic chemical vapor deposition (MOCVD) on sapphire substrate. From the high-resolution x-ray diffraction and transmission electron microscopy (TEM) measurements, it was indicated that the structure is of good quality and the AlGaN/GaN interfaces are abrupt and smooth. In order to obtain the values of Si doping and electronic concentrations in the AlGaN emitter and GaN emitter cap layers, Secondary Ion Mass Spectroscopy (SIMS) and electrochemical CV measurements were carried out. The results showed that though the flow rate of silane (SiH4) in growing the AlGaN emitter was about a quarter of that in growing GaN emitter cap and subcollector layer, the Si sputtering yield in GaN cap layer was much smaller than that in the AlGaN emitter layer. The electronic concentration in GaN was about half of that in the AlGaN emitter layer. It is proposed that the Si, Al co-doping in growing the AlGaN emitter layer greatly enhances the Si dopant efficiency in the AlGaN alloy. (c) 2006 WILEY-VCH Verlag GmbH & Co KGaA, Weinheim.
会议名称: 32nd International Symposium on Compound Semiconductors
KOS主题词: crystal impurities;  donor
会议文集: Physica Status Solidi C - Current Topics in Solid State Physics丛书标题: PHYSICA STATUS SOLIDI C-CURRENT TOPICS IN SOLID STATE PHYSICS
专题: 中国科学院半导体研究所(2009年前)_会议论文

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Ran, JX; Wang, XL; Hu, GX; Li, JP; Wang, JX; Wang, CM; Zeng, YP; Li, JM .The difference of Si doping efficiency in GaN and AlGaN in GaN-based HBT structure .见:WILEY-VCH, INC .Physica Status Solidi C - Current Topics in Solid State Physics丛书标题: PHYSICA STATUS SOLIDI C-CURRENT TOPICS IN SOLID STATE PHYSICS ,605 THIRD AVE, NEW YORK, NY 10158-0012 USA ,2006,Vol 3 no 3 3 (3): 490-493
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