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Issue 25, 2016
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Graphene induced porphyrin nano-aggregates for efficient electron transfer and photocurrent generation

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Abstract

Significant research attention has been given to graphene–porphyrin hybrid materials for light harvesting. In this report, we demonstrate the influence of graphene surface and aging time on the formation of porphyrin [5-(4-hydroxyphenyl)-10,15,20-triphenyl porphyrin (4-HPTP)] aggregates. The large sp2 conjugated network of reduced graphene oxide (RGO) may facilitate strong π–π stacking interactions that influence the aggregation of 4-HPTP. The morphologies of these assembled structures are characterized by field emission scanning electron microscopy (FE-SEM). Steady state and time resolved spectroscopic studies reveal that the formation of J-type aggregation of 4-HPTP on an RGO surface is higher than on a graphene oxide (GO) surface. In situ growth of porphyrin nanoassemblies on an RGO surface improves the electronic interaction by shortening the interfacial distance between graphene and porphyrin. It is evident that the electron transfer process is enhanced in the presence of RGO upon the photoexcitation of porphyrin nanoassemblies which eventually generate a photocurrent. These graphene decorated porphyrin nanoassemblies are promising materials for the development of new generation optoelectronic devices.

Graphical abstract: Graphene induced porphyrin nano-aggregates for efficient electron transfer and photocurrent generation

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Article information


Submitted
19 Apr 2016
Accepted
24 May 2016
First published
24 May 2016

J. Mater. Chem. C, 2016,4, 6027-6036
Article type
Paper

Graphene induced porphyrin nano-aggregates for efficient electron transfer and photocurrent generation

B. Mondal, R. Bera, S. K. Nayak and A. Patra, J. Mater. Chem. C, 2016, 4, 6027
DOI: 10.1039/C6TC01580H

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