Paper
27 February 2002 Combinatorial device fabrication and optimization of multilayer organic LEDs
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Abstract
In order to get a detailed understanding of organic light-emitting devices (OLEDs), optimize their performance and provide reliable data for device modeling, we have developed an ultra-high vacuum (UHV) evaporation system for combinatorial studies. Our system allows the simultaneous fabrication of 10 x 10 individual devices on one substrate enabling a systematic variation of material combinations and electrodes as well as device parameters such as layer thickness, layer sequence, dye dopant concentrations. Here, we present an overview of the capabilities of combinatorial methods for electrical and electro-optical device optimization. We show results on multilayer OLEDs ranging from the conventional copper-phthalocyanine (CuPc)/N,N'-di(naphtalene-1-yl)-N,N'-diphenyl-benzidine (NPB)/ and tris-(8-hydroxyquinolinato)aluminum (Alq) trilayer device to double-doped, red-emitting OLEDs with efficiencies up to 1.5 cd/A at 20 mA/cm2 measured through a semitransparent metal electrode and CIE color coordinates of x=0.65, y=0.34.
© (2002) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Tilman A. Beierlein, Hans-Peter Ott, Horst Hofmann, Heike Riel, Beat Ruhstaller, Brian Crone, Siegfried Karg, and Walter Riess "Combinatorial device fabrication and optimization of multilayer organic LEDs", Proc. SPIE 4464, Organic Light-Emitting Materials and Devices V, (27 February 2002); https://doi.org/10.1117/12.457474
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Cited by 14 scholarly publications.
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KEYWORDS
Organic light emitting diodes

Electrodes

Interfaces

Metals

Camera shutters

Data modeling

Doping

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