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Self‐Assembled Plasmonic Oligomers for Organic Photovoltaics
Author(s) -
Pastorelli Francesco,
Bidault Sebastien,
Martorell Jordi,
Bonod Nicolas
Publication year - 2014
Publication title -
advanced optical materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.89
H-Index - 91
ISSN - 2195-1071
DOI - 10.1002/adom.201300363
Subject(s) - plasmon , materials science , optoelectronics , photovoltaics , plasmonic solar cell , photovoltaic system , organic solar cell , quantum efficiency , fabrication , plasmonic nanoparticles , nanoparticle , nanotechnology , energy conversion efficiency , polymer solar cell , polymer , medicine , ecology , alternative medicine , composite material , pathology , biology
Introducing plasmonic resonant scatterers in photovoltaic devices is a promising way to increase energy conversion efficiencies by trapping incoming light in ultra‐thin solar cells. Colloidal plasmonic oligomers are obtained following a cost‐effective self‐assembly strategy and incorporated in organic‐based cells produced using spin‐coating techniques in ambient air conditions. An interesting increase is observed of both external quantum efficiency (EQE) and short‐circuit current for solar cells loaded with plasmonic oligomers compared with reference organic cells with and without isolated gold nanoparticles. Theoretical calculations demonstrate that the wavelength‐dependent EQE enhancement is a resonant process due to the increased scattering efficiency in plasmonic antennas allowed by a chemically controlled 1 nm nanogap. This method opens the way towards roll‐to‐roll fabrication of efficient plasmonic ultra‐thin photovoltaic devices.