Silicon-based tunneling field-effect transistor with elevated germanium source formed on (110) silicon substrate

被引:50
|
作者
Han, Genquan [1 ]
Guo, Pengfei [1 ]
Yang, Yue [1 ]
Zhan, Chunlei [1 ]
Zhou, Qian [1 ]
Yeo, Yee-Chia [1 ]
机构
[1] Natl Univ Singapore, Dept Elect & Comp Engn, Singapore 119260, Singapore
关键词
GE; PRESSURE; ALLOYS; GROWTH; BORON; GAAS; FET; SI;
D O I
10.1063/1.3579242
中图分类号
O59 [应用物理学];
学科分类号
摘要
Si-based tunneling field-effect transistors (TFETs) with elevated Ge source were fabricated on Si(110) substrate. The in situ B-doped Ge (Ge:B) source grown on Si(110) has a substitutional B concentration up to 7.8 X 10(20) cm(-3), that is more than one order of magnitude higher than that in Ge grown on Si(100) under the same growth conditions. Ge:B epitaxy on (110) and (100) Si is discussed. The TFET with elevated Ge source formed on Si(110) has a subthreshold swing of 85 mV/decade, which is a substantial improvement over that of the control TFET formed on Si(100). This is attributed to the high B doping concentration in the Ge: B(110) source as well as the band gap narrowing effect. (C) 2011 American Institute of Physics. [doi:10.1063/1.3579242]
引用
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页数:3
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