OLLA project delivers final OLED milestone

June 19, 2008
A pan-European OLED program has demonstrated an OLED lighting tile with an efficacy of 50.7 lm/W
10 x 10 cm OLED panel At the end of the project period, the OLLA project consortium presents its final milestone: the basic technology for a white OLED light source, with an efficacy of 50.7 lumens per watt at an initial brightness of 1000 cd/m2 based on the Novaled PIN OLED technology. The OLLA project is a joint basic research consortium, headed by Philips Lighting – the partners are listed at the end of this news item.

The 45-month OLLA project started on 1 October 2004 with a budget of EUR 20 million, of which EUR 12 million came from the European Union. Philips, Osram Opto Semiconductors, Siemens, Novaled and Fraunhofer IPMS will continue the development of OLED lighting technology in a follow-up project entitled OLED100.eu. The project aims to increase the efficiency, lifetime and size of OLEDs.

OLED technology is generating a novel and very attractive class of solid-state light sources, which are flat, thin, and very lightweight. Due to its freedom of design, OLED lighting technology offers many possibilities for new lighting applications achieving substantial energy savings.

Within OLLA, 24 partners from 8 European countries have been working closely together to develop OLED technology for lighting purposes with the goal to reach an efficacy of 50 lm/W combined with a lifetime of over 10,000 hours at 1000 cd/m2 initial brightness.

The partners reached the project targets in efficacy, color rendering and brightness, while the lifetime of the Novaled device exceeded the target value by one order of magnitude.

"The high efficiency combined with the extrapolated lifetime values prove that OLED is a serious technology for lighting applications, allowing innovative design capabilities and energy savings for future lighting products. It is a very important step towards the introduction of OLED technology in the lighting market," says Peter Visser, Project Manager OLLA project, Philips Lighting.

“The Novaled PIN technology has the potential to further improve the power efficiency. It’s in line with the technology roadmap that in the near future some 100 lm/W OLEDs will be achievable,” adds Martin Vehse from Novaled.

“Collecting all light of the device in a laboratory set-up with a macro extractor, we measure even more than 80 lm/W,” comments Volker van Elsbergen of Philips Research. "This shows that one of the keys to higher efficiencies will be better light out-coupling technologies.”

Besides the record values listed above, the OLLA project delivered the first large sized ITO-free OLEDs, the first large-area printed OLEDs and several ICT demonstrators. All demonstrators were on show on June 12 at a public event in Eindhoven.

OLLA Industrial Partners:
• Aixtron AG, Aachen, Germany
• Merck KGaA, Frankfurt, Germany
• H.C. Starck GmbH, Germany
• Novaled AG, Dresden, Germany
• Osram Opto Semiconductors GmbH, Regensburg, Germany
• Philips Electronics Nederland BV, Eindhoven, the Netherlands
• Philips Lighting GmbH, Aachen, Germany
• Philips GmbH Forschungslaboratorien, Aachen, Germany
• Sensient Imaging Technologies GmbH, Wolfen, Germany
• Siemens AG, Erlangen, Germany

• Ecole Polytechnique Fédérale de Lausanne (EPFL), Switzerland
• Katholieke Universiteit Leuven (KUL), Belgium
• Rijksuniversiteit Groningen (RUG), the Netherlands
• Institut für Angewandte Photophysik (IAPP), Technische Universität Dresden, Germany
• Universität Kassel, Germany
• Universiteit Gent, Belgium

Research Institutes:
• Centre National de la Recherche Scientifique - Institut des Matériaux Jean Rouxel de Nantes (CNRS-IMN), France
• Centre National de la Recherche Scientifique - Laboratoire de Chimie de Coordination du CNR (CNRS-LCC), France
• Consiglio Nazionale delle Ricerche Bologna (CNR-ISOF), Italy
• Consiglio Nazionale delle Ricerche Lecce (CNR-IFNM), Italy
• Fraunhofer Institute for Photonic MicroSystems (IPMS), Germany
• Institute of Physical Chemistry of the Polish Academy of Science, Poland
• Inter-universitair Micro-Electronica Centrum (IMEC), Belgium
• VTT Technical Research Centre, Finland