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Publication Details
AFRICAN RESEARCH NEXUS
SHINING A SPOTLIGHT ON AFRICAN RESEARCH
chemistry
Nanoscale growth of GaAs on patterned Si(111) substrates by molecular beam epitaxy
Crystal Growth and Design, Volume 14, No. 2, Year 2014
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Description
High-quality and defect-free GaAs were successfully grown via molecular beam epitaxy on silicon dioxide patterned Si(111) substrates by a two-step growth technique. Compared with the one-step approach, the two-step growth scheme has been found to be a better pathway to obtain a superior-quality GaAs on Si. Taking advantages of low energy for both Si(111) surface and GaAs/Si(111) interface, the two-step grown GaAs of total ∼175 nm atop patterned Si(111) substrates exhibits atomically smooth surface morphology, single crystallininty and a remarkably low defect density. A low-temperature GaAs nucleation layer of the two-step growth helps relieve the misfit stress by accommodating the misfit dislocations at the very adjacent GaAs/Si interface. The excellent properties of the two-step grown GaAs were investigated and verified by field-emission scanning electron microscopy, atomic force microscopy, X-ray diffraction, transmission electron microscopy, and Raman spectroscopy. Finally we demonstrated a GaAs on Si solar cell, which could represent an important milestone for future applications in light-emitting diodes, lasers, and photodetectors on Si. © 2013 American Chemical Society.
Authors & Co-Authors
Chu, Chia Pu
United States, Los Angeles
University of California, Los Angeles
Arafin, Shamsul
United States, Los Angeles
University of California, Los Angeles
Nie, Tianxiao
United States, Los Angeles
University of California, Los Angeles
Yao, Kaiyuan
United States, Los Angeles
University of California, Los Angeles
Kou, Xufeng
United States, Los Angeles
University of California, Los Angeles
He, Liang
United States, Los Angeles
University of California, Los Angeles
Wang, Chiu Yen
Taiwan, Taipei
National Taiwan University of Science and Technology
Chen, Szu Ying
Taiwan, Hsinchu
National Tsing Hua University
Chen, Lih Juann
Taiwan, Hsinchu
National Tsing Hua University
Qasim, Syed Manzoor
Saudi Arabia, Riyadh
King Abdulaziz City for Science and Technology
BenSaleh, Mohammed Sulaiman
Saudi Arabia, Riyadh
King Abdulaziz City for Science and Technology
Wang, Kang L.
United States, Los Angeles
University of California, Los Angeles
Statistics
Citations: 28
Authors: 12
Affiliations: 4
Identifiers
Doi:
10.1021/cg401423d
ISSN:
15287483
e-ISSN:
15287505
Research Areas
Environmental