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Proceedings Paper

GaAsP nanowires and nanowire devices grown on silicon substrates
Author(s): Yunyan Zhang; Martin Aagesen; Ana M. Sanchez; Richard Beanland; Jiang Wu; Huiyun Liu
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Paper Abstract

Ternary GaAsP nanowires (NWs) have gained great attention due to their structure-induced novel properties and band gap that can cover the working wavelength from green to infrared. However, the growth and hence applications of selfcatalyzed GaAsP NWs are troubled by the difficulties in controlling P and the complexities in growing ternary NWs. In this work, self-catalyzed core-shell GaAsP NWs were successfully grown and demonstrated almost stacking-fault-free zinc blend crystal structure. By using these core-shell GaAsP NWs, single NW solar cells have been fabricated and a single NW world record efficiency of 10.2% has been achieved. Those NWs also demonstrated their potential application in water splitting. A wafer-scale solar-to-hydrogen conversion efficiency of 0.5% has been achieved despite the low surface coverage. These results open up new perspectives for integrating III−V nanowire photovoltaics on a silicon platform by using self-catalyzed GaAsP core−shell nanowires.

Paper Details

Date Published: 27 January 2017
PDF: 8 pages
Proc. SPIE 10111, Quantum Sensing and Nano Electronics and Photonics XIV, 101110X (27 January 2017); doi: 10.1117/12.2250588
Show Author Affiliations
Yunyan Zhang, Univ. College London (United Kingdom)
Martin Aagesen, Gasp Solar ApS (Denmark)
Ana M. Sanchez, The Univ. of Warwick (United Kingdom)
Richard Beanland, The Univ. of Warwick (United Kingdom)
Jiang Wu, Univ. College London (United Kingdom)
Huiyun Liu, Univ. College London (United Kingdom)

Published in SPIE Proceedings Vol. 10111:
Quantum Sensing and Nano Electronics and Photonics XIV
Manijeh Razeghi, Editor(s)

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