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Proceedings Paper

Combinatorial device fabrication and optimization of multilayer organic LEDs
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Paper 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.

Paper Details

Date Published: 27 February 2002
PDF: 9 pages
Proc. SPIE 4464, Organic Light-Emitting Materials and Devices V, (27 February 2002); doi: 10.1117/12.457474
Show Author Affiliations
Tilman A. Beierlein, IBM Zurich Research Lab. (Switzerland)
Hans-Peter Ott, IBM Zurich Research Lab. (Switzerland)
Horst Hofmann, IBM Zurich Research Lab. (Switzerland)
Heike Riel, IBM Zurich Research Lab. (Switzerland)
Beat Ruhstaller, IBM Zurich Research Lab. (Switzerland)
Brian Crone, IBM Zurich Research Lab. (Switzerland)
Siegfried Karg, IBM Zurich Research Lab. (Switzerland)
Walter Riess, IBM Zurich Research Lab. (Switzerland)

Published in SPIE Proceedings Vol. 4464:
Organic Light-Emitting Materials and Devices V
Zakya H. Kafafi, Editor(s)

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