GROWTH TEMPERATURE-DEPENDENT ATOMIC ARRANGEMENTS AND THEIR ROLE ON BAND-GAP OF INGAAIP ALLOYS GROWN BY MOCVD

被引:66
作者
NOZAKI, C
OHBA, Y
SUGAWARA, H
YASUAMI, S
NAKANISI, T
机构
[1] Toshiba Corp, Japan
关键词
Electrons--Diffraction - Indium and Alloys - Photoluminescence;
D O I
10.1016/0022-0248(88)90560-X
中图分类号
O7 [晶体学];
学科分类号
0702 ; 070205 ; 0703 ; 080501 ;
摘要
Detailed observation of atomic arrangement in In0.5(Ga1-xAlx)0.5P (0&lex&le1) grown by MOCVD with a wide range of growth temperatures Tg (570-770°C) was carried out using electron diffraction and high resolution transmission electron microscopy. A correlation between the atomic arrangement and band-gap energy was studied by photoluminescence and photoacoustic spectroscopy. For Tg&le760°C, the epitaxial layers have ordered structures. For Tg≥770°C, the ordering disappear. Shifts in the band-gap depend on the density of the ordered layers for x&le0.5. For x≥0.5, the band-gap is not affected by the ordering.
引用
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页码:406 / 411
页数:6
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