BASF and OSRAM set new OLED standards

OLEDs

Most Commented

Unified Communication for your Biz

Improve your contact center performance. See how you can make a difference.

Watch Now

Reach the ICT Community

Engage and build your ICT audience with CIOL online advertising.

Know more

BASF and OSRAM set new OLED standards

A big step toward energy-saving OLED lighting with efficiency of over 60 lm/W; international standard for white color requirements met

Friday, November 28, 2008

Email This

Print This

Comments

RSS

SANTA CLARA, USA: BASF and OSRAM Opto Semiconductors have developed a highly efficient white organic light-emitting diode (OLED).

For the first time, an OLED not only is able to achieve a light yield of more than 60 lumens per watt (lm/W), but also, at the same time, meets the international Energy Star SSL Standard with regard to color requirements. Lighting efficiency describes the ratio of luminous flux given off by a lamp to the amount of power consumed; the greater the yield, the less energy is lost.

Although this efficiency benchmark had previously been achieved, until now the color values of OLEDs have not been within the acceptable band for color coordinates around the Planck curve, as defined by the Energy Star SSL Standard. The color values of the new OLED are within this band – its light retains the white color at different levels of intensity.

By developing a white OLED with a high light yield, the two companies have completed a major step on the way toward commercial OLED lighting. In the development laboratories of Siemens Corporate Technology (OSRAM is part of the Industry sector of Siemens), highly efficient semiconductor materials from BASF Research were combined with standard materials, and thereby new standards set with regard to color coordinates and efficiency.

BASF and OSRAM are conducting this research together within the framework of the "OLEDs for Applications on the Lighting Market" (OPAL) project. The OPAL project is being sponsored as part of the OLED Initiative of the German Federal Ministry for Education and Research (BMBF).

The new OLEDs contain phosphorescent metal complexes as emitter materials and customized complementary materials, which ensure optimum constancy of the color temperatures. That means that, owing to the use of new materials, the diodes are very color-stable even when there are variations in luminous intensity. The challenge now is to optimize the life of these OLED tiles, especially by stabilizing the blue emitters.

The lighting solution of the future
Beyond luminous efficiency, OLEDs offer even more convincing advantages. Unlike conventional filament bulbs, they do not become hot when emitting light, and less energy is lost through radiated heat. The laboratory results show that the new OLEDs are five times as efficient as filament bulbs and up to 50 percent more efficient compared with standard low-energy lamps. OLEDs consume much less electricity than conventional sources of light, so consumers in the future will be able to cut their electricity costs with OLEDs.

The experts at BASF are dealing with the material side of the OLEDs and, within the framework of the OPAL project, are developing the optimum component structures in partnership with Philips and OSRAM. BASF reached an important milestone in OLED research a few years ago. White light from OLEDs can best be obtained by combining red, green and blue light. For a long time, there was no efficient source for deep-blue light.

In 2003, BASF researchers laid the foundation for a phosphorescent blue emitter by developing a new class of materials based on an iridium complex. "Our aim is to develop stable blue phosphorescence emitters. While the color coordinates and efficiencies of the new blue OLEDs are already outstanding, the service life still presents many challenges," explains Dr. Elmar Keßenich, OLED project manager at BASF Future Business GmbH. "If we manage to produce deep-blue stable emitters, that will open up the way for us to make white OLED light tiles with a light yield of more than 100 lm/W."

In the future, organic light-emitting diodes will be suitable for general lighting as flat sources of light, for offices or as decorative lighting in stores. And they not only offer the potential of being considerably more economical than conventional low-energy bulbs in terms of electricity consumption, but are also capable of being used in a variety of ways as flat, transparent and, eventually, flexible sources of light.

They will provide completely new opportunities in terms of design and performance, in part owing to newly developed semiconductor materials from BASF. "The challenge now lies with the process engineers to apply these high efficiencies economically to large active areas," says Dr. Karsten Heuser, OPAL Coordinator and Director OLED Lighting Technology at OSRAM Opto Semiconductors.

©CIOL Bureau

Would you like to on this article?

Read Comments

Anil Jha said on 2/4/2009 5:50:08 PM:
India will provide a huge market for the OLED lighting. We would like to be in the forefronts. Presently we are into High Bri LED lighting. Manufacturers and suppliers of OLEDs may please contact us with budgetary pricing of the same.

to Anil Jha

Indrajit Aikat said on 2/1/2009 10:20:59 AM:
We have a development lab for Electroluminescent Lamps in Kolkata , India where we have successfully produced high effciency large format EL Lamps by Screen Printing . We are now interested to start R&D work on White OLED prodcution based on Screen Prnting Process and we are seeking qualified raw material Suppliers for the project.

to Indrajit Aikat

Name
Email
Your reply

Obama visit arouses mistrust among China netizens

I have never used Twitter: Obama

Satyam rejects Rs 1230-cr claims from 37 firms

Intuit Money Manager set to make India debut

Is China speaking English to beat Indian IT?

TSMC dismisses reports on SMIC intervention

Bright days for high-end microprocessor cards

Sand 9 goes strong with its MEMS

Tanner EDA ties up with TowerJazz

Sale of Altis likely soon

	Simplify Business Management. ERP solutions by IBM
	Carry your Dream, Convey your Value with ZTE
	A fault tolerant server to reduce your TCO

	A must attend event for IT Professionals
	How to make your enterprise productive
	Unified Communication can impact business. Know how

	Making Web3.0 a Reality!
	CIOL Enterprise Next :What's NEXT in IT? :
	Decrease Total System Costs With Cyclone IV FPGAs

	Reach your desired Target Audience and realize high ROI
	Effective ways of Customer Acquisition through Demand Generation
	Reach 2,500 potential Enterprise Customers!