Surface morphology;
Silicon growth;
Dislocations;
Photoluminescence in the 1.5-mu m region;
Scanning tunneling microscopy;
Atomic force microscopy;
GE-ISLANDS;
PHOTOLUMINESCENCE;
RECOMBINATION;
GERMANIUM;
COVERAGE;
SILICON;
ARRAYS;
D O I:
10.1016/j.apsusc.2012.05.069
中图分类号:
O64 [物理化学(理论化学)、化学物理学];
学科分类号:
070304 ;
081704 ;
摘要:
Layers of Si crystals grown on SiO2 surfaces are investigated by scanning tunneling and atomic force microscopy. The deposition of an array of Ge islands on SiO2 surfaces prior to Si growth is found to significantly decrease the concentration of Si crystals and make them more uniform in size. The Si crystals grown at temperatures from 430 to 550 degrees C have a rounded shape of the growing surface. This indicates the presence of a high concentration of threading dislocations and that is confirmed by the observation of dislocation-related photoluminescence in the 1.5 mu m region. Layers of Si crystals grown on SiO2 are of interest for the fabrication of optical resonant structures for the near-infrared region. (C) 2012 Elsevier B. V. All rights reserved.
机构:
State Key Laboratory of Electronic Thin Films and Integrated Devices,University of Electronic Science and Technology of ChinaState Key Laboratory of Electronic Thin Films and Integrated Devices,University of Electronic Science and Technology of China
Xiang-Yu Sun
Chuan-Gui Wu
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机构:
State Key Laboratory of Electronic Thin Films and Integrated Devices,University of Electronic Science and Technology of ChinaState Key Laboratory of Electronic Thin Films and Integrated Devices,University of Electronic Science and Technology of China
Chuan-Gui Wu
Wen-Bo Luo
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机构:
State Key Laboratory of Electronic Thin Films and Integrated Devices,University of Electronic Science and Technology of ChinaState Key Laboratory of Electronic Thin Films and Integrated Devices,University of Electronic Science and Technology of China
Wen-Bo Luo
Yao Shuai
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h-index: 0
机构:
State Key Laboratory of Electronic Thin Films and Integrated Devices,University of Electronic Science and Technology of ChinaState Key Laboratory of Electronic Thin Films and Integrated Devices,University of Electronic Science and Technology of China
Yao Shuai
Wang-Li Zhang
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机构:
State Key Laboratory of Electronic Thin Films and Integrated Devices,University of Electronic Science and Technology of ChinaState Key Laboratory of Electronic Thin Films and Integrated Devices,University of Electronic Science and Technology of China