Example of a 10x10 cm2 white OLED on a HC Starck CleviosTM PH510 PEDOT layer.
(Picture source: Fraunhofer IPMS )
At the end of the project period, the OLLA project* consortium presents
its final milestone: the basic technology for a white OLED (Organic Light-
Emitting Diode) light source, with an efficacy of 50.7 lumens per watt at
an initial brightness of 1.000 cd/m² based on the Novaled PIN OLED
technology. The OLLA project is a joint basic research consortium,
headed by Philips Lighting.

The 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 of 8 European countries have been working closely together developing OLED
technology for lighting purposes with the goal to reach an efficacy of 50 lumens per watt
combined with a lifetime of over 10.000 hours at 1.000 cd/m2 initial brightness.
Philips Research and Novaled, together with the partners reached the project targets in efficacy,
color rendering and brightness. The lifetime of the Novaled device even exceeded the promised
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 Dr. 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 lumens per Watt”, comments Dr. Volker van Elsbergen, Philips Research, the
achievement. "This shows that one of the keys to higher efficiencies will be better light
outcoupling 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 last Thursday on a public event in Eindhoven.
Philips, Osram Opto Semiconductors, Siemens, Novaled and Fraunhofer IPMS will continue the
development of OLED lighting technology in a follow-up project. Within this new OLED100.eu
project, the efficiency, lifetime and size of OLEDs will further increased.