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Formation, Optical Properties and Applications of Edge Gold-Coated Silver Nanoprisms

Published online by Cambridge University Press:  09 June 2015

Mohammad M. Shahjamali ,
Michael Salvador  and
Negin Zaraee
Mohammad M. Shahjamali
Affiliation:
Department of Chemistry, Northwestern University, 2145 Sheridan Road, Evanston, Illinois 60208, USA. School of Materials Science and Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore 639798, Singapore.
Michael Salvador
Affiliation:
Department of Chemistry, University of Washington, Seattle, Washington 98195, USA. Instituto de Telecomunicações, Instituto Superior Técnico, Av. Rovisco Pais, P-1049-001 Lisboa, Portugal
Negin Zaraee
Affiliation:
Department of Chemistry, Northwestern University, 2145 Sheridan Road, Evanston, Illinois 60208, USA.
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Abstract

A facile, high-yield synthesis of edge gold-coated silver nanoprisms (GSNPs) with a gold nanoframe as thin as 1.7 nm and their comprehensive characterizations by using various spectroscopic and microscopic techniques is introduced. The GSNPs exhibit remarkably higher stability than silver nanoprisms (SNPs) and are therefore explored as effective optical antennae for light-harvesting applications. When embedded into a bulk heterojunctions film of P3HT:PCBM, plasmonic GSNPs with a localized surface plasmon resonance (LSPR) around 500 nm can effectively act as optical antennae to enhance light harvesting in the active layer. As a result, we measured up to 7-fold enhancement in the polaron generation yield through photoinduced absorption spectroscopy. Owing to the high stability and strong field enhancement, the presented GSNPs feature great potential as plasmonic probes for photovoltaic applications and LSPR sensing.

Keywords

photovoltaicAgcolloid
Type
Articles
Information
MRS Online Proceedings Library (OPL) , Volume 1737: Symposium U – Organic Photovoltaics—Fundamentals, Materials and Devices , 2015 , mrsf14-1737-u01-05
Copyright
Copyright © Materials Research Society 2015 

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