Jos Haverkort, TUE

Title: Efficient water splitting with semiconductor nanowires
Session: Monday 5 October, 15:00

Abstract

Photoelectrochemical hydrogen production from solar energy and water offers a clean and sustainable fuel option for the future. Planar III/V material systems have shown the highest efficiencies; but are expensive. By moving to the nanowire regime the demand on material quantity is reduced, and new materials can be uncovered, such as wurtzite gallium phosphide (GaP), featuring a direct bandgap. This is one of the few materials combining large solar light absorption and (close to) ideal band-edge positions for full water splitting. Here, we report 2.9% efficiency on p-type wurtzite GaP nanowires for a high bandgap topcell, and 6.2% efficiency on InP nanowires for a single junction cell.

 

 

 

 

Bio

dr. Jos E.M. Haverkort is a lecturer at the Eindhoven University of Technology since 1987. He currently specializes on III/V semiconductor nanowires for photovoltaic applications, solar water splitting and LEDs. He is also involved in the optical study of wurtzite GaP nanowires and crystal phase quantum dots. Under his guidance, an 11.1% efficiency InP nanowire array solar cell was reported in 2013. Recently, a top-down etched InP nanowire solar cell was developed with an efficiency of 19.1%.

 

 

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