Flexible and Metal-Free Light-Emitting Electrochemical Cells Based on Graphene and PEDOT-PSS as the Electrode Materials
2011 (English)In: ACS Nano, ISSN 1936-0851, Vol. 5, no 1, 574-580 p.Article in journal (Refereed) Published
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/m2. We also find that CDG is electrochemically inert over a wide potential range (+1.2 to −2.8 V vsferrocene/ferrocenium) and exploit this property to demonstrate planar LEC devices with CDG as both the anode and the cathode.
Place, publisher, year, edition, pages
Washington D.C.: American Chemical Society , 2011. Vol. 5, no 1, 574-580 p.
light-emitting electrochemical cell, metal-free, flexible, solution processing, graphene, superyellow, PEDOT-PSS, doping, p−n junction
Condensed Matter Physics
IdentifiersURN: urn:nbn:se:umu:diva-48543DOI: 10.1021/nn102704hOAI: oai:DiVA.org:umu-48543DiVA: diva2:450796