Journal
NANO LETTERS
Volume 9, Issue 11, Pages 3704-3709Publisher
AMER CHEMICAL SOC
DOI: 10.1021/nl901734e
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Funding
- Major State Research Development Program of China [2006CB933000]
- National Natural Science Foundation of China [50702010]
- National Excellent Doctoral Dissertations of China [200743]
- Beijing Nova Program [20081324]
- Research Grants Council of Hong Kong SAR-CRF [CityU5/CRF/08]
- RGC
- NSFC [N_CityU108/08]
- [NCET-08-0060]
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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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