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    Rights statement: This is the peer reviewed version of the following article: Fujita, H., Carrington, P. J., Wagener, M. C., Botha, J. R., Marshall, A. R. J., James, J., Krier, A., Lee, K.-H., and Ekins-Daukes, N. J. (2015) Open-circuit voltage recovery in type II GaSb/GaAs quantum ring solar cells under high concentration. Prog. Photovolt: Res. Appl., 23: 1896–1900. doi: 10.1002/pip.2615 which has been published in final form at http://onlinelibrary.wiley.com/doi/10.1002/pip.2615/abstract This article may be used for non-commercial purposes in accordance With Wiley Terms and Conditions for self-archiving.

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Open-circuit voltage recovery in type II GaSb/GaAs quantum ring solar cells under high concentration

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<mark>Journal publication date</mark>12/2015
<mark>Journal</mark>Progress in Photovoltaics: Research and Applications
Issue number12
Volume23
Number of pages5
Pages (from-to)1896-1900
Publication statusPublished
Early online date11/04/15
Original languageEnglish

Abstract

We report on the open-circuit voltage recovery in GaSb quantum ring (QR) solar cells under high solar concentration up to 2500 suns. The detailed behaviour of type II GaSb/GaAs QR solar cells under solar concentration, using different temperatures and light illumination conditions, is analysed through optical and electrical measurements. Although enhancement of the short-circuit current was observed because of sub-bandgap photon absorption in the QR, the thermionic emission rate of holes was found to be insufficient for ideal operation. The direct excitation of electron–hole pairs into QRs has revealed that the accumulation of holes is one of the causes of the open-circuit voltage (VOC) degradation. However, using concentrated light up to 2500 suns, the GaSb QR cell showed much quicker VOC recovery rate than a GaAs control cell.

Bibliographic note

This is the peer reviewed version of the following article: Fujita, H., Carrington, P. J., Wagener, M. C., Botha, J. R., Marshall, A. R. J., James, J., Krier, A., Lee, K.-H., and Ekins-Daukes, N. J. (2015) Open-circuit voltage recovery in type II GaSb/GaAs quantum ring solar cells under high concentration. Prog. Photovolt: Res. Appl., 23: 1896–1900. doi: 10.1002/pip.2615 which has been published in final form at http://onlinelibrary.wiley.com/doi/10.1002/pip.2615/abstract This article may be used for non-commercial purposes in accordance With Wiley Terms and Conditions for self-archiving.