Flexible and metal-free light-emitting electrochemical cells based on graphene and PEDOT-PSS as the electrode materials

Piotr Matyba; Hisato Yamaguchi; Manish Chhowalla; Nathaniel D Robinson; Ludvig Edman

doi:10.1021/nn102704h

Flexible and metal-free light-emitting electrochemical cells based on graphene and PEDOT-PSS as the electrode materials

ACS Nano. 2011 Jan 25;5(1):574-80. doi: 10.1021/nn102704h. Epub 2010 Dec 28.

Authors

Piotr Matyba¹, Hisato Yamaguchi, Manish Chhowalla, Nathaniel D Robinson, Ludvig Edman

Affiliation

¹ The Organic Photonics and Electronics Group, Department of Physics, Umeå University, SE-901 87 Umeå, Sweden.

PMID: 21189028
DOI: 10.1021/nn102704h

Abstract

We report flexible and metal-free light-emitting electrochemical cells (LECs) using exclusively solution-processed organic materials and illustrate interesting design opportunities offered by such conformable devices with transparent electrodes. Flexible LEC devices based on chemically derived graphene (CDG) as the cathode and poly(3,4-ethylenedioxythiophene) mixed with poly(styrenesulfonate) as the anode exhibit a low turn-on voltage for yellow light emission (V = 2.8 V) and a good efficiency 2.4 (4.0) cd/A at a brightness of 100 (50) cd/m(2). We also find that CDG is electrochemically inert over a wide potential range (+1.2 to -2.8 V vs ferrocene/ferrocenium) and exploit this property to demonstrate planar LEC devices with CDG as both the anode and the cathode.

Publication types

Research Support, Non-U.S. Gov't
Research Support, U.S. Gov't, Non-P.H.S.

MeSH terms

Bridged Bicyclo Compounds, Heterocyclic / chemistry*
Electricity
Electrochemistry
Electrodes
Graphite / chemistry*
Light*
Polyethylene Terephthalates / chemistry
Polymers / chemistry*
Polystyrenes / chemistry*
Surface Properties

Substances

Bridged Bicyclo Compounds, Heterocyclic
Polyethylene Terephthalates
Polymers
Polystyrenes
poly(3,4-ethylene dioxythiophene)
polystyrene sulfonic acid
Graphite