NDLI: Photovoltaic response for high density InGaAs coupled quantum dots

Content Provider	IEEE Xplore Digital Library
Author	Chuang, K.Y. Tzeng, K.D. Tzeng, T.E. Layl, T.S. Lin, C. Cho, H. Feng, D.J.Y.
Copyright Year	2012
Description	Author affiliation: Department of Photonics, National Sun Yat-Sen University, Kaohsiung 804, Taiwan (Chuang, K.Y.; Tzeng, K.D.; Tzeng, T.E.; Layl, T.S.) \|\| Institute of Photonic Systems, College of Photonics, National Chiao-Tung University, Tainan 71150, Taiwan (Lin, C.) \|\| Department of Electrical Engineering, National University of Kaohsiung, Kaohsiung 811, Taiwan (Cho, H.; Feng, D.J.Y.)
Abstract	In order to enhance absorption at infrared range for GaAs based solar cell, we insert the nine-layer of vertically coupled quantum dots (VCQDs) into the active layer. We fine modulated the GaAs spacer thickness of coupled InAs QDs, and investigated the effects on photovoltaic response. For the open-circuit voltage (V), the values decreases from 0.61 V to 0.55 V as the spacer thickness (d) decreases from d= 15 nm to 5 nm for the nine-layer VCQDs solar cells. The reduction of V for the VCQDs solar cells is attributed to the accumulation of compressive strain energy in the active QD region. For the sample of d=10 nm shows the best performance of current density (J∼24 $mA/cm^{2})$ and efficiency (η∼10.6). The J and η are increases by 55% and 112% more than the device without QDs, respectively.
Starting Page	000781
Ending Page	000784
File Size	779174
Page Count	4
File Format	PDF
ISBN	9781467300643
ISSN	01608371
e-ISBN	9781467300667
DOI	10.1109/PVSC.2012.6317720
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2012-06-03
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Photovoltaic systems Abstracts Gallium arsenide Coatings Doping Molecular beam epitaxy Quantum dots InGaAs Solar cells Photovoltaic Vertically coupling
Content Type	Text
Resource Type	Article
Subject	Industrial and Manufacturing Engineering Control and Systems Engineering Electrical and Electronic Engineering

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