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

Research output: Contribution to journalArticle

81 Citations (Scopus)

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 turnon 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/m2. 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.

Original languageEnglish
Pages (from-to)574-580
Number of pages7
JournalACS Nano
Volume5
Issue number1
DOIs
Publication statusPublished - Jan 25 2011

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Electrochemical cells
electrochemical cells
electrode materials
Graphene
graphene
Metals
Electrodes
Anodes
Cathodes
anodes
cathodes
metals
Light emission
organic materials
low voltage
light emission
Luminance
brightness
electrodes

Keywords

  • Doping
  • Flexible
  • Graphene
  • Light-emitting electrochemical cell
  • Metal-free
  • P-n junction
  • PEDOT-PSS
  • Solution processing
  • Superyellow

ASJC Scopus subject areas

  • Engineering(all)
  • Materials Science(all)
  • Physics and Astronomy(all)

Cite this

Flexible and metal-free light-emitting electrochemical cells based on graphene and PEDOT-PSS as the electrode materials. / Matyba, Piotr; Yamaguchi, Hisato; Chhowalla, Manish; Robinson, Nathaniel D.; Edman, Ludvig.

In: ACS Nano, Vol. 5, No. 1, 25.01.2011, p. 574-580.

Research output: Contribution to journalArticle

Matyba, Piotr ; Yamaguchi, Hisato ; Chhowalla, Manish ; Robinson, Nathaniel D. ; Edman, Ludvig. / Flexible and metal-free light-emitting electrochemical cells based on graphene and PEDOT-PSS as the electrode materials. In: ACS Nano. 2011 ; Vol. 5, No. 1. pp. 574-580.
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