Applicability of Steady State Model to Carrier Thermodynamics in InAs Quantum Dot

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The carrier thermodynamics of InAs self assembled quantum dot (QD) are investigated. The investigated parameters include the dependence of quantum dot photoluminescence on temperature and the photoluminescence (PL) dependence on the excitation power density. Results are discussed on the basis of steady state model. The model predicts that the photoluminescence integrated intensity has linear dependence on the excitation power density in low temperature range, and super linear in the high temperature range. Our data matches the prediction of the steady state model. In our sample the super linearity starts to take place at T = 150 K and the super linear behavior of the photoluminescence on excitation power density proves that the carrier dynamics in our quantum dot sample are dominated by uncorrelated electron hole pair in the high temperature region.


Document Type: Research Article


Publication date: January 1, 2011

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  • Journal for Nanoscience and Nanotechnology (JNN) is an international and multidisciplinary peer-reviewed journal with a wide-ranging coverage, consolidating research activities in all areas of nanoscience and nanotechnology into a single and unique reference source. JNN is the first cross-disciplinary journal to publish original full research articles, rapid communications of important new scientific and technological findings, timely state-of-the-art reviews with author's photo and short biography, and current research news encompassing the fundamental and applied research in all disciplines of science, engineering and medicine.
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