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White organic light-emitting diodes with 4 nm metal electrode

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Gather_2015_APL_White.pdf (1.100Mb)
Date
19/10/2015
Author
Lenk, Simone
Schwab, Tobias
Schubert, Sylvio
Müller-Meskamp, Lars
Leo, Karl
Gather, Malte Christian
Reineke, Sebastian
Keywords
Silver
Organic light emitting diodes
Gold
Anodes
Bending
QC Physics
NDAS
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Abstract
We investigate metal layers with a thickness of only a few nanometers as anode replacement for indium tin oxide (ITO) in white organic light-emitting diodes (OLEDs). The ultrathin metal electrodes prove to be an excellent alternative that can, with regard to the angular dependence and efficiency of the OLED devices, outperform the ITO reference. Furthermore, unlike ITO, the thin composite metal electrodes are readily compatible with demanding architectures (e.g., top-emission or transparent OLEDs, device unit stacking, etc.) and flexible substrates. Here, we compare the sheet resistance of both types of electrodes on polyethylene terephthalate for different bending radii. The electrical performance of ITO breaks down at a radius of 10 mm, while the metal electrode remains intact even at radii smaller than 1 mm.
Citation
Lenk , S , Schwab , T , Schubert , S , Müller-Meskamp , L , Leo , K , Gather , M C & Reineke , S 2015 , ' White organic light-emitting diodes with 4 nm metal electrode ' , Applied Physics Letters , vol. 107 , no. 16 , 163302 . https://doi.org/10.1063/1.4934274
Publication
Applied Physics Letters
Status
Peer reviewed
DOI
https://doi.org/10.1063/1.4934274
ISSN
0003-6951
Type
Journal item
Rights
© 2015 AIP Publishing LLC. This work is made available online in accordance with the publisher’s policies. This is the final published version of the work, which was originally published at: https://dx.doi.org/10.1063/1.4934274
Collections
  • University of St Andrews Research
URI
http://hdl.handle.net/10023/7840

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