A 24.4% solar to hydrogen energy conversion efficiency by combining concentrator photovoltaic modules and electrochemical cells

A 24.4% solar to hydrogen energy conversion efficiency by combining concentrator photovoltaic modules and electrochemical cells

The highest efficiency of 24.4% for the solar-to-hydrogen (STH) energy conversion was obtained in an outdoor field test by combining concentrator photovoltaic (CPV) modules with InGaP/GaAs/Ge three-junction cells and polymer-electrolyte electrochemical (EC) cells. The high efficiency was obtained by...

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Veröffentlicht in:Applied physics express 2015-10, Vol.8 (10), p.107101
Hauptverfasser: Nakamura, Akihiro, Ota, Yasuyuki, Koike, Kayo, Hidaka, Yoshihide, Nishioka, Kensuke, Sugiyama, Masakazu, Fujii, Katsushi
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container_issue 10
container_start_page 107101
container_title Applied physics express
container_volume 8
creator Nakamura, Akihiro
Ota, Yasuyuki
Koike, Kayo
Hidaka, Yoshihide
Nishioka, Kensuke
Sugiyama, Masakazu
Fujii, Katsushi
description The highest efficiency of 24.4% for the solar-to-hydrogen (STH) energy conversion was obtained in an outdoor field test by combining concentrator photovoltaic (CPV) modules with InGaP/GaAs/Ge three-junction cells and polymer-electrolyte electrochemical (EC) cells. The high efficiency was obtained by using the high-efficiency CPV modules (∼31% under the present operation conditions) and the direct connection between the CPV modules and the EC cells with an almost optimized number of elements in series. The STH efficiency bottleneck was clarified to be the efficiency of the CPV modules, the over-potential of the EC cells, and matching of the operation point to the maximal-power point of the CPV modules.
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title A 24.4% solar to hydrogen energy conversion efficiency by combining concentrator photovoltaic modules and electrochemical cells
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