Platinum Nanoparticle Decorated Silicon Nanowires for Efficient Solar Energy Conversion

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 enhancemen...

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Bibliographic Details
Published in:Nano letters 2009-11, Vol.9 (11), p.3704-3709
Main Authors: Peng, Kui-Qing, Wang, Xin, Wu, Xiao-Ling, Lee, Shuit-Tong
Format: Article
Language:English
Subjects:
Applied sciences
Cross-disciplinary physics: materials science
rheology
Energy
Exact sciences and technology
Materials science
Nanocrystalline materials
Nanoscale materials and structures: fabrication and characterization
Natural energy
Photovoltaic conversion
Physics
Quantum wires
Solar cells. Photoelectrochemical cells
Solar energy
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Summary: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−/Br2 redox couple. The results demonstrate PtNP-decorated SiNWs to be a promising hybrid system for solar energy conversion.
ISSN:1530-6984
1530-6992
DOI:10.1021/nl901734e