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Proceedings Paper

Large area ITO-free flexible white OLEDs with Orgacon PEDOT:PSS and printed metal shunting lines
Author(s): Stephan Harkema; Sibe Mennema; Marco Barink; Harmen Rooms; Joanne S. Wilson; Ton van Mol; Dirk Bollen
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Paper Abstract

We demonstrate the feasibility of white organic light-emitting diodes that exclude the transparent conductor indium-tinoxide. Instead, a highly conductive OrgaconTM PEDOT:PSS material in combination with a metal support structure is used as transparent anode and hole-injection layer. The PEDOT:PSS exhibits a conductivity of 460±20 S/cm and a work function of 5.35±0.05 eV. On ITO-free OLEDs on glass with an active area of ~6 cm2 the inclusion of 120 nm thick printed metal lines reduces the variation in brightness from 35% to 20%. The ITO-free concept based on PEDOT:PSS with printed metal structures is scaled up to large flexible OLEDs with a size of 150 cm2 on a heat-stabilized Teonex® Polyethylene Naphtalate foil. The voltage distribution across the various electrodes was verified by a finite element model, allowing a prediction of the OLED brightness and homogeneity over large areas.

Paper Details

Date Published: 27 August 2009
PDF: 8 pages
Proc. SPIE 7415, Organic Light Emitting Materials and Devices XIII, 74150T (27 August 2009); doi: 10.1117/12.825246
Show Author Affiliations
Stephan Harkema, Holst Centre TNO (Netherlands)
Sibe Mennema, TNO Science and Industry (Netherlands)
Marco Barink, TNO Science and Industry (Netherlands)
Harmen Rooms, Holst Centre TNO (Netherlands)
Joanne S. Wilson, Holst Centre TNO (Netherlands)
Ton van Mol, Holst Centre TNO (Netherlands)
Dirk Bollen, Agfa-Gevaert B.V. (Belgium)

Published in SPIE Proceedings Vol. 7415:
Organic Light Emitting Materials and Devices XIII
Franky So; Chihaya Adachi, Editor(s)

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