Combinatorial device fabrication and optimization of multilayer organic LEDs

Tilman A. Beierlein; Hans-Peter Ott; Horst Hofmann; Heike Riel; Beat Ruhstaller; Brian Crone; Siegfried Karg; Walter Riess

doi:10.1117/12.457474

27 February 2002 Combinatorial device fabrication and optimization of multilayer organic LEDs

Tilman A. Beierlein, Hans-Peter Ott, Horst Hofmann, Heike Riel, Beat Ruhstaller, Brian Crone, Siegfried Karg, Walter Riess

Author Affiliations +

Proceedings Volume 4464, Organic Light-Emitting Materials and Devices V; (2002) https://doi.org/10.1117/12.457474
Event: International Symposium on Optical Science and Technology, 2001, San Diego, CA, United States

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.

Citation Download Citation

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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