CHARACTERIZATION OF CARBON-DOPED GAAS GROWN BY MOLECULAR-BEAM EPITAXY USING NEOPENTANE AS CARBON SOURCE

被引:3
|
作者
SHIRAHAMA, M [1 ]
NAGAO, K [1 ]
TOKUMITSU, E [1 ]
KONAGAI, M [1 ]
TAKAHASHI, K [1 ]
机构
[1] TOKYO INST TECHNOL,DEPT PHYS ELECTR,MEGURO KU,TOKYO 152,JAPAN
关键词
GAAS; CARBON; NEOPENTANE; MBE; HYDROGEN; ANNEALING;
D O I
10.1143/JJAP.32.5473
中图分类号
O59 [应用物理学];
学科分类号
摘要
Neopentane C(CH-3)4, has been successfully used as a new carbon source in the molecular beam epitaxial MBE growth of carbon-doped GaAs. The hole concentration, which agrees with the carbon concentration, increases with increasing cracking temperature in the temperature range above 700-degrees-C. The highest hole concentration obtained using neopentane is 1.6 x 10(20) cm-3. Optical and electrical properties of a MBE-grown C-doped GaAs layer with neopentane are comparable to those of a metalorganic molecular beam epitaxy (MOMBE) grown C-doped GaAs layer using TMG and solid arsenic and MBE-grown Be-doped GaAs. The maximum hole concentration of 1.6 X 10(20) cm-3 increases to 2.5 x 10(20) cm-3 after annealing at 400-degrees-C for 1 h in N2 ambient. This is due to removal of hydrogen which passivates carbon acceptors in the as-grown GaAs.
引用
收藏
页码:5473 / 5478
页数:6
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