ISSN:
1662-8985
Source:
Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
Notes:
For successive annealing stages the photoluminescence (PL) peaks of InXGa1-XN/GaNquantum wells (QWs) shift initially towards red which is followed by a blue. This phenomenoncontradicts the usual monotonic blueshift. We have found that the phenomena can be explainedproperly only if we consider recombinations from the higher sub-bands to be present in the PL ofthe InXGa1-XN/GaN QWs, which is not usual. When a strong piezoelectric field exists across a QW,as encountered in InXGa1-XN/GaN QWs, the probability of optical transitions from higher sub-bandsof the QW become more probable. In this paper this theory has been established from experimentalresults
Type of Medium:
Electronic Resource
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/01/40/transtech_doi~10.4028%252Fwww.scientific.net%252FAMR.31.62.pdf
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