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Excitation energy transfer from dye molecules to doped graphene

Swathi, RS and Sebastian, KL (2012) Excitation energy transfer from dye molecules to doped graphene. In: Journal of Chemical Sciences, 124 (1, SI). pp. 233-240.

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Abstract

Recently, we have reported theoretical studies on the rate of energy transfer from an electronically excited molecule to graphene. It was found that graphene is a very efficient quencher of the electronically excited states and that the rate infinity z(-4). The process was found to be effective up to 30 nm which is well beyond the traditional FRET limit. In this report, we study the transfer of an amount of energy (h) over bar Omega from a dye molecule to doped graphene. We find a crossover of the distance dependence of the rate from z(-4) to exponential as the Fermi level is increasingly shifted into the conduction band, with the crossover occurring at a shift of the Fermi level by an amount (h) over bar Omega/2.

Item Type: Journal Article
Additional Information: Copyright for this article belongs to the Indian Academy of Sciences (IAS).
Keywords: FRET;graphene;quenching;doping;Dirac cone approximation; Fermi golden rule;K-Point;electron-hole pairs.
Department/Centre: Division of Chemical Sciences > Inorganic & Physical Chemistry
Date Deposited: 12 Jun 2012 12:09
Last Modified: 12 Jun 2012 12:09
URI: http://eprints.iisc.ernet.in/id/eprint/44570

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