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Proceedings Paper

Screen-printed passive matrix displays and multicolor devices
Author(s): Jan Birnstock; Joerg Blaessing; A. Hunze; M. Scheffel; Matthias Stoessel; Karsten Heuser; J. Woerle; Georg Wittmann; A. Winnacker
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Paper Abstract

Due to their outstanding properties organic light-emitting displays based on conjugated polymers are on the verge of commercialization. Two major disadvantages of the current processing technique for polymers, spin-coating of polymer solutions, are the material waste and the difficulties involved in patterning the polymers. Therefore we investigate the screen-printing for the production of polymer displays. Here we present performance data of screen-printed light-emitting diodes of different colors. In the production process of these diodes we printed two layers successively one over the other. Furthermore, we show images of printed multichrome demonstrators and passive matrix displays. Our data indicate that the screen-printing technique has the potential to replace the classical spin-coat process. We observe luminance of 10,000 cd/m2 at 8 V and peak efficiencies exceeding 10 cd/A for green diodes and half lifetime of 170 hours at 80 degree(s)C and 100 cd/m2 for red diodes which corresponds to about 7,000 hours at room temperature. These values of printed devices are comparable to those of spin-coated ones.

Paper Details

Date Published: 27 February 2002
PDF: 8 pages
Proc. SPIE 4464, Organic Light-Emitting Materials and Devices V, (27 February 2002); doi: 10.1117/12.457461
Show Author Affiliations
Jan Birnstock, Siemens AG and Friedrich-Alexander Univ. Erlangen-Nuernberg (Germany)
Joerg Blaessing, Siemens AG and Friedrich-Alexander Univ. Erlangen-Nuernberg (Germany)
A. Hunze, Siemens AG and Friedrich-Alexander Univ. Erlangen-Nuernberg (Germany)
M. Scheffel, Siemens AG and Friedrich-Alexander Univ. Erlangen-Nuernberg (Germany)
Matthias Stoessel, Siemens AG (United States)
Karsten Heuser, Siemens AG (Germany)
J. Woerle, Siemens AG (Germany)
Georg Wittmann, Siemens AG (Germany)
A. Winnacker, Friedrich-Alexander Univ. Erlangen-Nuernberg (Germany)

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

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