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Comparative study of GaAs and GaInNAs/GaAs multi-quantum well solar cells

Royall, B and Balkan, Naci and Mazzucato, Simone and Khalil, Hagir and Hugues, Maxime and Roberts, J S (2011) 'Comparative study of GaAs and GaInNAs/GaAs multi-quantum well solar cells.' physica status solidi (b), 248 (5). pp. 1191-1194. ISSN 0370-1972

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Abstract

Current–voltage (I–V) characteristics together with spectral quantum efficiency (QE) measurements are performed on a GaAs control and GaInNAs/GaAs multi-quantum well (MQW) solar cell under illumination with the AM1.5G spectrum. Nitrogen and Indium composition in the GaInNAs wells were selected as to ensure lattice matching to GaAs. The wells are shown to extend the spectral response to longer wavelengths but also cause a reduction in the QE at wavelengths below the GaAs band gap. Furthermore, the addition of wells generally causes a large decrease in open circuit voltage due to the increased dark current. The MQW cell reaches an efficiency of 5% compared to 8.5% for the GaAs control cell.

Item Type: Article
Uncontrolled Keywords: dilute nitrides; GaInNAs; multi-quantum well; solar cells
Subjects: T Technology > TK Electrical engineering. Electronics Nuclear engineering
Divisions: Faculty of Science and Health > Computer Science and Electronic Engineering, School of
Depositing User: Jim Jamieson
Date Deposited: 05 Mar 2012 16:53
Last Modified: 05 Mar 2012 16:53
URI: http://repository.essex.ac.uk/id/eprint/2248

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