Suppressing nonradiative recombination in crown-shaped quantum wells

Title
Suppressing nonradiative recombination in crown-shaped quantum wells
Authors
김형준주건우나병훈박광욱황형용조영달명노성임상엽이용탁
Keywords
quantum well; GaAs; recombination; crown-shaped
Issue Date
2018-03
Publisher
Japanese Journal of Applied Physics, Part 1- Regular Papers
Citation
VOL 57, NO 3-030305-4
Abstract
We examined the structural and optical properties of a crown-shaped quantum well (CSQW) to suppress nonradiative recombination. To reduce carrier loss in defect traps at the well/barrier interface, the CSQW was designed to concentrate carriers in the central region by tailoring the bandgap energy. Temperature-dependent photoluminescence measurements showed that the CSQW had a high activation energy and low potential fluctuation. In addition, the long carrier lifetime of the CSQW at high temperatures can be interpreted as indicating a decrease in carrier loss at defect traps.
URI
http://pubs.kist.re.kr/handle/201004/67306
ISSN
0021-4922
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KIST Publication > Article
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