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Approaching the limits of transparency and conductivity in graphitic materials through lithium intercalation.
Bao, Wenzhong; Wan, Jiayu; Han, Xiaogang; Cai, Xinghan; Zhu, Hongli; Kim, Dohun; Ma, Dakang; Xu, Yunlu; Munday, Jeremy N; Drew, H Dennis; Fuhrer, Michael S; Hu, Liangbing.
Afiliación
  • Bao W; 1] Department of Physics, University of Maryland, College Park, Maryland 20742-4111, USA [2] Department of Materials Science and Engineering, University of Maryland, College Park, Maryland 20742-4111, USA [3] University of Maryland Energy Research Center, College Park, Maryland 20742-4111, USA [4].
  • Wan J; 1] Department of Materials Science and Engineering, University of Maryland, College Park, Maryland 20742-4111, USA [2] University of Maryland Energy Research Center, College Park, Maryland 20742-4111, USA [3].
  • Han X; 1] Department of Materials Science and Engineering, University of Maryland, College Park, Maryland 20742-4111, USA [2] University of Maryland Energy Research Center, College Park, Maryland 20742-4111, USA.
  • Cai X; Department of Physics, University of Maryland, College Park, Maryland 20742-4111, USA.
  • Zhu H; 1] Department of Materials Science and Engineering, University of Maryland, College Park, Maryland 20742-4111, USA [2] University of Maryland Energy Research Center, College Park, Maryland 20742-4111, USA.
  • Kim D; Department of Physics, University of Maryland, College Park, Maryland 20742-4111, USA.
  • Ma D; 1] Department of Electrical and Computer Engineering, University of Maryland, College Park, Maryland 20742-4111, USA [2] Institute for Research in Electronics and Applied Physics, University of Maryland, College Park, Maryland 20742-4111, USA.
  • Xu Y; 1] Department of Electrical and Computer Engineering, University of Maryland, College Park, Maryland 20742-4111, USA [2] Institute for Research in Electronics and Applied Physics, University of Maryland, College Park, Maryland 20742-4111, USA.
  • Munday JN; 1] Department of Electrical and Computer Engineering, University of Maryland, College Park, Maryland 20742-4111, USA [2] Institute for Research in Electronics and Applied Physics, University of Maryland, College Park, Maryland 20742-4111, USA.
  • Drew HD; Department of Physics, University of Maryland, College Park, Maryland 20742-4111, USA.
  • Fuhrer MS; 1] Department of Physics, University of Maryland, College Park, Maryland 20742-4111, USA [2] School of Physics, Monash University, Melbourne, Victoria 3800, Australia.
  • Hu L; 1] Department of Materials Science and Engineering, University of Maryland, College Park, Maryland 20742-4111, USA [2] University of Maryland Energy Research Center, College Park, Maryland 20742-4111, USA.
Nat Commun ; 5: 4224, 2014 Jul 01.
Article en En | MEDLINE | ID: mdl-24981857
ABSTRACT
Various band structure engineering methods have been studied to improve the performance of graphitic transparent conductors; however, none has demonstrated an increase of optical transmittance in the visible range. Here we measure in situ optical transmittance spectra and electrical transport properties of ultrathin graphite (3-60 graphene layers) simultaneously during electrochemical lithiation/delithiation. On intercalation, we observe an increase of both optical transmittance (up to twofold) and electrical conductivity (up to two orders of magnitude), strikingly different from other materials. Transmission as high as 91.7% with a sheet resistance of 3.0 Ω per square is achieved for 19-layer LiC6, which corresponds to a figure of merit σ(dc)/σ(opt) = 1,400, significantly higher than any other continuous transparent electrodes. The unconventional modification of ultrathin graphite optoelectronic properties is explained by the suppression of interband optical transitions and a small intraband Drude conductivity near the interband edge. Our techniques enable investigation of other aspects of intercalation in nanostructures.
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: Nat Commun Asunto de la revista: BIOLOGIA / CIENCIA Año: 2014 Tipo del documento: Article
Texto completo
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: Nat Commun Asunto de la revista: BIOLOGIA / CIENCIA Año: 2014 Tipo del documento: Article