Photocurrent Enhancement by Surface Plasmon Resonance of Silver Nanoparticles in Highly Porous Dye-Sensitized Solar Cells

Localized surface plasmon resonance (LSPR) by silver nanoparticles that are photochemically incorporated into an electrode-supported TiO2 nanoparticulate framework enhances the extinction of a subsequently adsorbed dye (the ruthenium-containing molecule, N719). The enhancement arises from both an in...

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Bibliographic Details
Published in:Langmuir 2011-12, Vol.27 (23), p.14609-14614
Main Authors: Jeong, Nak Cheon, Prasittichai, Chaiya, Hupp, Joseph T
Format: Article
Language:English
Subjects:
Chemistry
Colloidal state and disperse state
Coloring Agents - chemistry
Exact sciences and technology
General and physical chemistry
Materials: Nano-and Mesostructured Materials, Polymers, Gels, Liquid Crystals, Composites
Metal Nanoparticles - chemistry
Organometallic Compounds - chemistry
Photochemical Processes
Physical and chemical studies. Granulometry. Electrokinetic phenomena
Porosity
Porous materials
Silver - chemistry
Solar Energy
Surface Plasmon Resonance
Surface Properties
Thiocyanates - chemistry
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Summary:Localized surface plasmon resonance (LSPR) by silver nanoparticles that are photochemically incorporated into an electrode-supported TiO2 nanoparticulate framework enhances the extinction of a subsequently adsorbed dye (the ruthenium-containing molecule, N719). The enhancement arises from both an increase in the dye’s effective absorption cross section and a modest increase in the framework surface area. Deployment of the silver-modified assembly as a photoanode in dye-sensitized solar cells leads to light-to-electrical energy conversion with an overall efficiency of 8.9%. This represents a 25% improvement over the performance of otherwise identical solar cells lacking corrosion-protected silver nanoparticles. As one would expect based on increased dye loading and electromagnetic field enhanced (LSPR-enhanced) absorption, the improvement is manifested chiefly as an increase in photocurrent density ascribable to improved light harvesting.
ISSN:0743-7463
1520-5827
DOI:10.1021/la203557f