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CPP: Chemische Physik und Polymerphysik
CPP 19: SYMPOSIUM Functional Organic Thin Films I
CPP 19.9: Vortrag
Donnerstag, 30. März 2006, 12:15–12:30, ZEU Lich
New highly conductive formulation of PEDOT:PSS - a substitute of ITO for OLED anodes — •Karsten Fehse1, Karsten Walzer1, Gufeng He1, Martin Pfeiffer1, Karl Leo1, Wilfried Lövenich 2, and Andreas Elschner2 — 1Institut für Angewandte Photophysik, TU Dresden, D-01062 Dresden, Germany — 2H.C. Starck GmbH, Central Research and Development Division, c/o Bayer AG, Bldg. B 202, D-51368 Leverkusen, Germany
Standard organic light emitting diodes (OLEDs) emit through a transparent and electrically conductive substrate. Indium tin oxide (ITO) is usually used for this purpose. Due to increasing costs of ITO, we suggest the use of a polymer instead, which carries out both hole transport and injection. The OLED itself is based on a stack of small molecules with doped transport layers.We use a new highly conductive formulation of PEDOT:PSS with a conductivity of 500 S/cm, that provides a smooth and electrically suitable substrate for the OLED stack. We discuss both fluorescent and phosphorescent monochromic OLEDs based on such a formulation which achieve good efficiencies. The OLEDs made thereon will be compared with devices of similar stack on ITO.