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Published on: July 2, 2012
Self-assembled silver nanoparticles for plasmon-enhanced solar cell back reflectors: correlation between structural
Seweryn Morawiec1, Manuel J Mendes, Salvatore Mirabella
1MATIS CNR-IMM, via S. Sofia 64, I-95123 Catania, Italy. seweryn.morawiec@ct.infn.it
Nanotechnology
|June 5, 2013
Summary
Localized surface plasmon resonances in silver nanoparticles are linked to their size and shape. Surface coverage parameters best correlate nanoparticle morphology with optical properties for solar cell applications.
Area of Science:
- Materials Science
- Nanotechnology
- Optics
Background:
- Localized surface plasmon resonances (LSPRs) are crucial optical phenomena in metallic nanoparticles.
- Self-assembled silver nanoparticles (NPs) offer tunable plasmonic properties.
- Understanding structure-property relationships is key for advanced material applications.
Purpose of the Study:
- To investigate the relationship between structural properties and LSPR spectra in self-assembled silver NPs.
- To establish fabrication conditions that control NP size and shape.
- To explore the potential of these nanostructures in thin-film solar cells.
Main Methods:
- Preparation of silver NPs via solid-state dewetting of thin films.
- Analysis of NP structural properties, including size, shape, and surface coverage.
- Spectroscopic characterization of LSPR.
- Interpretation of results using Mie theory.
Main Results:
- A structural-phase diagram was proposed to map NP formation based on fabrication conditions.
- Surface coverage distribution and mean surface coverage (SC) were identified as key statistical parameters.
- A strong correlation was found between NP morphology and optical properties.
Conclusions:
- The study provides a framework for controlling silver NP morphology and LSPR.
- Surface coverage parameters effectively link nanostructure morphology to optical behavior.
- Silver NPs demonstrate potential as plasmon-enhanced back reflectors for thin-film solar cells.
