Applied Physics A

, Volume 120, Issue 3, pp 1197–1203 | Cite as

Implementation of graphene multilayer electrodes in quantum dot light-emitting devices

  • Svenja Wolff
  • Dennis Jansen
  • Hendrik Terlinden
  • Yusuf Kelestemur
  • Wolfgang Mertin
  • Hilmi Volkan Demir
  • Gerd Bacher
  • Ekaterina Nannen
Article
  • 302 Downloads

Abstract

Graphene is a highly attractive candidate for implementation as electrodes in next-generation large-area optoelectronic devices thanks to its high electrical conductivity and high optical transparency. In this study, we show all-solution-processed quantum dot-based light-emitting devices (QD-LEDs) using graphene mono- and multilayers as transparent electrodes. Here, the effect of the number of graphene layers (up to three) on the QD-LEDs performance was studied. While the implementation of a second graphene layer was found to reduce the turn-on voltage from 2.6 to 1.8 V, a third graphene layer was observed to increase the turn-on voltage again, which is attributed to an increased roughness of the graphene layer stack.

Notes

Acknowledgments

We are grateful to S. Sanders, J. Frohleiks, J. Rest and K. Dunkhorst for support and assistance with the experiments. We kindly acknowledge financial support of the University Duisburg-Essen and OSRAM GmbH. Y.K and H.V.D acknowledge financial supports from ESF EURYI, EU FP7 Network of Excellence “Nanophotonics for Energy Efficiency (N4E) and TUBA—Turkish Academy of Sciences”.

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Copyright information

© Springer-Verlag Berlin Heidelberg 2015

Authors and Affiliations

  • Svenja Wolff
    • 1
    • 2
  • Dennis Jansen
    • 1
    • 2
  • Hendrik Terlinden
    • 1
    • 2
  • Yusuf Kelestemur
    • 3
  • Wolfgang Mertin
    • 2
  • Hilmi Volkan Demir
    • 3
    • 4
  • Gerd Bacher
    • 2
  • Ekaterina Nannen
    • 1
    • 2
  1. 1.Research Group “Solid State Lighting”, NanoEnergieTechnikZentrumUniversity Duisburg-EssenDuisburgGermany
  2. 2.Werkstoffe der Elektrotechnik and CENIDEUniversität Duisburg-EssenDuisburgGermany
  3. 3.Department of Electrical and Electronics Engineering, Department of Physics, UNAM – Institute of Materials Science and NanotechnologyBilkent UniversityAnkaraTurkey
  4. 4.Luminous! Center of Excellence for Semiconductor Lighting and Displays, School of Electrical and Electronic Engineering, School of Physical and Materials SciencesNanyang Technological UniversitySingaporeSingapore

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