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Enhancing the Power Conversion Efficiency of Inverted Organic Photovoltaics with Gold Functionalized Reduced Graphene Oxide

Published online by Cambridge University Press:  11 June 2015

Rebecca Isseroff ,
Zhenhua Yang ,
Jessica Kim ,
Andrew Chen  and
Miriam Rafailovich
Rebecca Isseroff
Affiliation:
Dept. of Materials Science and Engineering, SUNY Stony Brook, Stony Brook, NY 11794, United States
Zhenhua Yang
Affiliation:
Dept. of Materials Science and Engineering, SUNY Stony Brook, Stony Brook, NY 11794, United States
Jessica Kim
Affiliation:
Manhasset High School, Manhasset NY 11030, United States
Andrew Chen
Affiliation:
Rice University, Houston, TX 77251, United States
Miriam Rafailovich
Affiliation:
Dept. of Materials Science and Engineering, SUNY Stony Brook, Stony Brook, NY 11794, United States
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Abstract

In this study, an “inverted” design, phase-separated morphology and gold-functionalized reduced graphene oxide (Au-rGO) were used to address exciton recombination and poor Fermi level alignment. To increase efficiencies, a unique methodology was used to coat Au-rGO on top of the active layer. When 0.05 Au-rGO was blended with the active layer, there were metal-thiolate bonds with P3HT and π-π stacking with PCBM. However, KPFM, measured for the first time for this material, showed that the while 0.05mM Au-rGO reduced the energy gap between P3HT and PBCM, this was offset by recombination. KPFM showed that Au-rGO may be better suited between the active layer and electrode. When 0.5mM Au-rGO was coated on top of the active layer, efficiency increased (p<0.002) nearly 600%, suggesting that Au-rGO is a more effective acceptor than a constituent of the active layer.

Keywords

energy generationphotovoltaiccomposite
Type
Articles
Information
MRS Online Proceedings Library (OPL) , Volume 1737: Symposium U – Organic Photovoltaics—Fundamentals, Materials and Devices , 2015 , mrsf14-1737-u18-39
Copyright
Copyright © Materials Research Society 2015 

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