Researchers light up Europe with LEDs

Jan 17, 2012
Researchers light up Europe with LEDs

Novel light-source technology just got a big boost in Europe thanks to the OLED100.eu ('Organic LED (light-emitting diode) lighting in European dimensions') project which tackled the challenge to develop the techniques needed to form the basis for efficient OLED applications for the European general lighting industry. The OLED100.eu researchers have successfully increased the energy efficiency and lifetime of organic LEDs for large-area lighting applications.

Led by Philips Technologie GmbH in Germany, the OLED100.eu team has been working on OLEDs for the last three years. Over this 36-month period, the researchers resolved technical quirks and probed the acceptance levels and preferences of end users concerning this new . They also developed a large-area luminaire consisting of 9 OLED tiles of 33 x 33 square centimetres each.

The aims and objectives of the study were to boost the luminous efficacy, strengthen the lifetime, upscale the light-emitting area, optimise processes to slash production costs, and standardise measurement based on application research.

The OLED100.eu team succeeded in demonstrating high-efficiency OLEDs based on Novaled PIN OLED technology and out-coupling materials showing 60 lumens per watt (lm/W) which are more efficient than energy-saving lamps. They also secured long-lifetime OLEDs with Novaled know-how, showing 100 000 hours comparable to inorganic LED lifetime. The researchers performed perception case studies on taste and acceptance of OLEDs as light source, and they carried out industrialisation scenarios and cost calculation of production processes with a particular focus on cost-efficient technologies like screen-printing for substrate structuring. And they succeeded in devising standardisation of measurement procedures for OLEDs, which currently serve as the basis for work of the International Commission on Illumination (CIE).

'The OLED100.eu research consortium has played a vital part in ensuring that Europe will play a leading role in OLED technology for lighting applications also in the future,' says Dr Stefan Grabowski, senior scientist at Philips Research Laboratories in Aachen.

Commenting on the results of the project, Dr Karsten Diekmann of OSRAM GmbH in Germany says: 'The results of OLED100.eu will contribute to further increase the acceptance of OLED technology. In the project we gained a better understanding of end-user preferences, a better comparability through standardised measurement procedures, and better OLEDs.'

For his part, Dr. Christian May, the head of Business Unit OLED Lighting says: 'The work to achieve the challenging goals of the OLED 100.eu project brought us to a higher level of our COMEDD pilot process line. We are really proud of the 33 x 33 cm2 large OLED panels, which are one of the largest worldwide and made at our pilot process line.'

OLEDs convert current into light, but are different from inorganic LEDs because they emit over a large area. The thickness of the light-emitting area is just around 400 nanometres, which is about 100 times thinner than a human hair.

The OLED100.eu partners are from Belgium, Germany, France, the Netherlands, Austria and the United Kingdom.

Explore further: New tech aims to improve communication between dogs and humans

More information: oled100.eu/homepage.asp

add to favorites email to friend print save as pdf

Related Stories

High-brightness breakthrough

Jun 28, 2005

As a result of cooperation between Philips Lighting, Philips Research and Novaled have announced a new record for the efficiency of high-brightness white OLEDs, a new solid state lighting technology. OLEDs are expected to ...

Researchers 'brighten' the future of OLED technology

Apr 14, 2011

Chlorine is an abundant and readily available halogen gas commonly associated with the sanitation of swimming pools and drinking water. Could a one-atom thick sheet of this element revolutionize the next generation of flat-panel ...

Next Generation Light Source

Nov 23, 2005

The Technische Universität Dresden partakes in one of the world’s largest projects on the development of innovative organic light-emitting diodes (OLEDs). Scientists at the Institute of Applied Photophysics have been developing ...

Recommended for you

Study says upgrading infrastructure could reduce flood damage

Oct 29, 2014

The severe flooding that devastated a wide swath of Colorado last year might have been less destructive if the bridges, roads and other infrastructure had been upgraded or modernized, according to a new study from the University ...

Walk through buildings from your own device

Oct 29, 2014

Would you like to visit The Frick Collection art museum in New York City but can't find the time? No problem. You can take a 3-D virtual tour that will make you feel like you are there, thanks to Yasutaka ...

'Ambulance drone' prototype unveiled in Holland

Oct 28, 2014

A Dutch-based student on Tuesday unveiled a prototype of an "ambulance drone", a flying defibrillator able to reach heart attack victims within precious life-saving minutes.

User comments : 2

Adjust slider to filter visible comments by rank

Display comments: newest first

Eikka
5 / 5 (1) Jan 17, 2012
Two problems. 60 lm/W is not better than CFLs, and it's way worse than regular fluorescent tubes. Color rendering index? Not mentioned - probably awful.

How did they measure 100,000 hours?
antialias_physorg
not rated yet Jan 17, 2012
60 lm/W is not better than CFLs
Considering that OLEDs are relatively new compared to CFL that's already pretty good.

And this:
The thickness of the light-emitting area is just around 400 nanometres

Certainly beats out CFLs any day and opens up all kinds of new lighting schemes (walls, floors, furniture, ... )

I could imagine that producing such thin films will, if we find a roll-on procss, be vastly cheaper than producing CFLs. Possibly also less hazardous for the environment.

Can't wait till I can furnish my home Tron style.

Please sign in to add a comment. Registration is free, and takes less than a minute. Read more

Click here to reset your password.
Sign in to get notified via email when new comments are made.