Volume 4, Issue 2 (International Journal of Optics and Photonics (IJOP) Vol 4, No. 2, Summer-Fall 2010)                   IJOP 2010, 4(2): 77-86 | Back to browse issues page

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Asgari A, Razi S, Ghasemi F. Modeling of High Temperature GaN Quantum Dot Infrared Photodetectors. IJOP. 2010; 4 (2) :77-86
URL: http://ijop.ir/article-1-49-en.html
School of Electrical, Electronic and Computer Engineering, The University of Western Australia
Abstract:   (2033 Views)
In this paper, we present calculations for different parameters of quantum dot infrared photodetectors. We considered a structure which includes quantum dots with large conduction-band-offset materials (GaN/AlGaN). Single band effective mass approximation has been applied in order to calculate the electronic structure. Throughout the modeling, we tried to consider the limiting factors which decline high temperature performance of these devices. Temperature dependent behavior of the responsivity and dark current were presented and discussed for different applied electric fields. Specific detectivity used as figure of merit, and its peak was calculated in different temperatures. This paper indicates the state of the art in the use of the novel III-N materials in infrared detectors, with their special properties such as spontaneous and piezoelectric polarizations. It was found that, III- nitride Quantum dots have a good potential to depress the thermal effects in the dark current which yields the specific detectivity up to~ 2107 CmHz 1/ 2/W at room temperature.
Full-Text [PDF 240 kb]   (897 Downloads)    
Type of Study: Research | Subject: General
Received: 2013/06/18 | Revised: 2015/03/10 | Accepted: 2015/03/10 | Published: 2015/03/10

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