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Nano Lett. 2009 Nov;9(11):3704-9. doi: 10.1021/nl901734e.

Platinum nanoparticle decorated silicon nanowires for efficient solar energy conversion.

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  • 1Key Laboratory of Beam Technology and Material Modification of Ministry of Education and College of Nuclear Science and Technology, Department of Physics, Beijing Normal University, Beijing 100875, China.


High-density aligned n-type silicon nanowire (SiNW) arrays decorated with discrete 5-10 nm platinum nanoparticles (PtNPs) have been fabricated by aqueous electroless Si etching followed by an electroless platinum deposition process. Coating of PtNPs on SiNW sidewalls yielded a substantial enhancement in photoconversion efficiency and an apparent energy conversion efficiency of up to 8.14% for the PtNP-decorated SiNW-based photoelectrochemical solar cell using a liquid electrolyte containing Br(-)/Br(2) redox couple. The results demonstrate PtNP-decorated SiNWs to be a promising hybrid system for solar energy conversion.

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