White organic light-emitting diodes with 4 nm metal electrode

Journal Article · Mon Oct 19 00:00:00 EDT 2015 · Applied Physics Letters

DOI:https://doi.org/10.1063/1.4934274· OSTI ID:22485950

Lenk, Simone; Schwab, Tobias; Schubert, Sylvio; Müller-Meskamp, Lars; Leo, Karl; Reineke, Sebastian ^[1]; Gather, Malte C. ^[1]

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1. Institut für Angewandte Photophysik, Technische Universität Dresden, George-Bähr-Straße 1, 01069 Dresden (Germany)

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.

• OSTI ID: 22485950
• Journal Information: Applied Physics Letters, Vol. 107, Issue 16; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); ISSN 0003-6951
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
ANODES
EFFICIENCY
EMISSION
LAYERS
LIGHT EMITTING DIODES
PERFORMANCE
POLYESTERS
SUBSTRATES
TIN OXIDES