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Proceedings Paper

Flexible polymeric light-emitting diodes
Author(s): Ralph Paetzold; Debora Henseler; Karsten Heuser; Wiebke Sarfert; Georg Wittmann; Albrecht Winnacker
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Paper Abstract

Flexibility is one of the most frequently mentioned advantages if organic light emitting diodes are compared to other display technologies. In this contribution we show how the different functional layers respond to applied mechanical stress. To characterize the intrinsic flexibility of the stacked layers in an organic light emitting diode separately, samples with anode and cathode layers on flexible plastic substrates are investigated separately first. We observe that the ITO can withstand more than 30 000 bending cycles, concave as well as convex, down to a radius of curvature of 8 mm without apparent damage. Furthermore, the operational characteristics of completed flexible organic light-emitting devices built on indium-tin oxide coated poly(ether sulfone) under single bending cycles are investigated. Performance data taken at 15 mm radius of curvature show no influence compared to the non-planar conditions.

Paper Details

Date Published: 16 February 2004
PDF: 8 pages
Proc. SPIE 5214, Organic Light-Emitting Materials and Devices VII, (16 February 2004); doi: 10.1117/12.506835
Show Author Affiliations
Ralph Paetzold, Friedrich-Alexander-Univ. Erlangen-Nuernberg (Germany)
Debora Henseler, Siemens AG (Germany)
Karsten Heuser, Siemens AG (Germany)
Wiebke Sarfert, Friedrich-Alexander-Univ. Erlangen-Nuernberg (Germany)
Georg Wittmann, Siemens AG (Germany)
Albrecht Winnacker, Friedrich-Alexander-Univ. Erlangen-Nuernberg (Germany)

Published in SPIE Proceedings Vol. 5214:
Organic Light-Emitting Materials and Devices VII
Zakya H. Kafafi; Paul A. Lane, Editor(s)

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