Highly transparent conducting graphene films produced by langmuir blodgett assembly as flexible electrodes

Xiuyi Lin, Jingjing Jia, Nariman Yousefi, Xi Shen, Jang Kyo Kim

Research output: Chapter in book / Conference proceedingConference article published in proceeding or bookAcademic researchpeer-review

2 Citations (Scopus)

Abstract

This paper reports the development of an efficient method to produce transparent conductive graphene films layer-by-layer on a flexible substrate based on the Langmuir Blodgett (LB) assembly technique. Monolayer ultralarge graphene oxide (UL-GO) sheets of average lateral size greater than 300 μm2 are prepared by repeated centrifugation of as-prepared GO aqueous dispersion. GO films having different numbers of GO layers are fabricated using the LB method while controlling the LB trough surface pressure and pulling speed of the substrate from the dispersion. GO films are chemically reduced at 90°C using hydrogen iodide (HI) acid, followed by chemical doping treatments. The sheet resistance values of the graphene thin films on a PET film are 1.8 and 1.1 kω/sq for 2 and 4 graphene layers, respectively, with a transparency of higher than 90%, which are sufficient for many useful applications. It is found that the thicker the film, the higher the conductivity; and vice versa for the transparency of the graphene films.

Original languageEnglish
Title of host publication14th International Conference on Electronic Materials and Packaging, EMAP 2012
DOIs
Publication statusPublished - 29 Apr 2013
Externally publishedYes
Event14th International Conference on Electronic Materials and Packaging, EMAP 2012 - Lantau Island, Hong Kong
Duration: 13 Dec 201216 Dec 2012

Publication series

Name14th International Conference on Electronic Materials and Packaging, EMAP 2012

Conference

Conference14th International Conference on Electronic Materials and Packaging, EMAP 2012
Country/TerritoryHong Kong
CityLantau Island
Period13/12/1216/12/12

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials

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