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Excitons of edge and surface functionalized graphene nanoribbons

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Excitons of edge and surface functionalized graphene nanoribbons

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Title: Excitons of edge and surface functionalized graphene nanoribbons
Author: Zhu, Xi; Su, Haibin
Copyright year: 2010
Abstract: We apply density functional theory to study the optical properties of armchair graphene nanoribbons (AGNRs) functionalized from both edge and surface employing quasiparticle corrections and many body, that is, electron−hole, interactions. The variation in band gaps is scrutinized in terms of bonding character and the localization of wave functions. We have determined the family and functionalization dependence of quasiparticle correction, absorption spectrum, exciton binding strength, and its wave function’s spatial characteristics. In particular, all the excitons exhibit non-Frenkel character that results from the interplay among the extended π electron states and weakly screened columbic interactions. The functionalized AGNRs hold promising potential in optoelectronic applications.
Subject: DRNTU::Engineering::Materials::Photonics and optoelectronics materials.
Type: Journal Article
Series/ Journal Title: Journal of physical chemistry C
School: School of Materials Science and Engineering
Rights: © 2010 American Chemical Society.
Version: Accepted version

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