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Title: Imaging of High-Angle Annular Dark Field Scanning Transmission Electron Microscopy and Microscopy Studies of GaN-based Light Emitting Diodes and Laser Diodes
Authors: Makoto Shiojiri
Keywords: high-angle annular dark field scanning transmission electron microscopy
field-emission scanning electron microscopy
high-resolution transmission electron microscopy
InGaN-based light emitting diodes
laser diodes
multiple quantum wells
strain-layer superlattice cladding
quantum dots
Issue Date: 2008
Publisher: Faculty of Science, Chiang Mai University
Citation: Chiang Mai Journal of Science 35, 3 (September 2008),495-520
Abstract: Atomic-resolution high-angle annular dark-field (HAADF) scanning transmission electron microscopy (STEM) has been used to the structural and compositional analysis of materials. The first part of this paper is a review of our recent HAADF-STEM investigations, which comprise physics to understand its imaging, and illustration of artifacts in images and imaging process. Next, we present our investigations of the multiple InGaN/GaN quantum wells and the strained AlGaN/GaN superlattice cladding in InGaN-based light emitting diodes or laser diodes, which have been performed by HAADF-STEM, high-resolution field-emission scanning electron microscopy, and high-resolution transmission electron microscopy. The observation of ultra-high density InGaN quantum dots is also shown.
Description: The Chiang Mai Journal of Science is an international English language peer-reviewed journal which is published in open access electronic format 6 times a year in January, March, May, July, September and November by the Faculty of Science, Chiang Mai University. Manuscripts in most areas of science are welcomed except in areas such as agriculture, engineering and medical science which are outside the scope of the Journal. Currently, we focus on manuscripts in biology, chemistry, physics, materials science and environmental science. Papers in mathematics statistics and computer science are also included but should be of an applied nature rather than purely theoretical. Manuscripts describing experiments on humans or animals are required to provide proof that all experiments have been carried out according to the ethical regulations of the respective institutional and/or governmental authorities and this should be clearly stated in the manuscript itself. The Editor reserves the right to reject manuscripts that fail to do so.
ISSN: 2465-3845
Appears in Collections:CMUL: Journal Articles

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