Derivitization of pristine graphene for bulk heterojunction polymeric photovoltaic devices

In this communication, we report a simple method for a covalent band-forming reaction to change the hybridization of carbon atoms from sp super(2) to sp super(3), to introduce a band gap in pristine graphene. Graphene with well-defined functionality was synthesized, and the resulting material was so...

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Bibliographic Details
Published in:Journal of materials chemistry 2012-01, Vol.22 (33), p.16723-16727
Main Authors: Ye, Lei, Xiao, Ting, Zhao, Ni, Xu, Haihua, Xiao, Yubin, Xu, Jianbin, Xiong, Yuzi, Xu, Weijian
Format: Article
Language:English
Subjects:
Carbon
Covalence
Devices
Esters
Graphene
Photovoltaic cells
Solar cells
Solvents
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Summary:In this communication, we report a simple method for a covalent band-forming reaction to change the hybridization of carbon atoms from sp super(2) to sp super(3), to introduce a band gap in pristine graphene. Graphene with well-defined functionality was synthesized, and the resulting material was soluble in organic solvent. The LUMO of functionalized graphene was below the LUMO of poly(3-hexylthiophene) (P3HT) and close to that of [6,6]-phenyl C sub(61)-butyric acid methyl ester (PCBM), indicating its suitability as an electron acceptor for organic photovoltaic (OPV) applications. We further show the P3HT/functionalized graphene composite as the active layer in a solar cell, with device efficiency of 1.1%.
ISSN:0959-9428
1364-5501
DOI:10.1039/c2jm32729e