On the Role of Graphene in Polymer-Based Bulk Heterojunction Solar Cells

As a new material, graphene is considered to have great potential in photovoltaic applications, due to its superior physical and electronic properties. In this manuscript, the behavior of graphene nanosheets prepared by different processing methods were investigated in order to probe their applicabi...

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Bibliographic Details
Published in:Key engineering materials 2012-08, Vol.521, p.47-60
Main Authors: Yu, Fei, Kuppa, Vikram K., Bahner, M.
Format: Article
Language:English
Subjects:
Charge transfer
Charge transport
Graphene
Heterojunctions
Optoelectronic devices
Photovoltaic cells
Quenching
Solar cells
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Summary:As a new material, graphene is considered to have great potential in photovoltaic applications, due to its superior physical and electronic properties. In this manuscript, the behavior of graphene nanosheets prepared by different processing methods were investigated in order to probe their applicability in polymer-based bulk heterojunction optoelectronic devices. Raman spectroscopy was employed to study the formation of interfaces between the conjugated polymer and graphene, while photoluminescence quenching was used to investigate charge transfer from P3HT to graphene. The current-voltage characteristics of fabricated cells were investigated to elucidate the role of graphene in their performance. We demonstrate that the addition of small quantities of graphene promotes exciton dissociation and charge transport in P3HT:PCBM BHJ devices, leading to a novel paradigm for organic solar cells.
ISSN:1013-9826
1662-9795
1662-9795
DOI:10.4028/www.scientific.net/KEM.521.47