VietNam 2013 

IXth Rencontres du Vietnam
Quy-Nhon, August 4-10, 2013


 Nanophysics: from fundamentals to applications

(the return)


Wednesday 7

› 14:40 - 15:00 (20min)
Novel highly conductive graphene materials for whole graphene opto-electronics
Saverio Russo  1@  , Thomas Bointon  2@  , Monica Craciun  3@  
1 : Centre for Graphene Science, Physics, University of Exeter  -  Website
StockerRoad 6, Exeter -  United Kingdom
2 : Centre for Graphene Science, CEMPS, University of Exeter
StockerRoad 6, Exeter -  United Kingdom
3 : Centre for Graphene Science, CEMPS, University of Exeter
Harrison building, Exeter -  United Kingdom

The development of future flexible and transparent electronics relies on novel materials, which are mechanically flexible, lightweight and low-cost, in addition to being electrically conductive and optically transparent. Graphene is an atomically thin conductive, transparent and flexible material which can replace the brittle Indium Tin Oxide (ITO). However, the use of graphene as a truly transparent conductor remains a great challenge because the lowest values of its resistivity demonstrated so far are above the values of commercially available ITO. Chemical functionalization of graphene offers a simple way to improve the electrical properties of these materials.
Here we report novel graphene-based transparent conductors dubbed Graphexeter and obtained by intercalating few-layer graphene (FLG) with ferric chloride (FeCl3) [1]. Through a combined study of magneto-transport and optical transmission measurements we demonstrate that FeCl3 enhances the electrical conductivity of FLG to unprecedented values while leaving these materials highly transparent. This is the best known transparent conductor. Finally, we demonstrate a high performance photodetection in transparent all-graphene devices based on heterostructures of graphene and graphexeter.
[1] I. Khrapach, et al. Adv. Mater. 24, 2844 (2012).

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