New materials boost efficiency of OLEDs by 25 percent

March 23rd, 2009 - 5:57 pm ICT by IANS  

Washington, March 23 (IANS) New materials synthesised by researchers can boost efficiency of blue organic light emitting diodes or OLEDs by at least 25 percent.
OLEDs represent a cutting edge technology in superior lighting. These multi-layered devices produce light by running a current through a specially engineered host material into which light-producing phosphorescent molecules are embedded or “doped”.

The white light envisioned for large-scale applications, such as rooms and buildings, consists of red, green and blue light.

“The weakest link in OLED research is the absence of an efficient, long-lasting blue light to accompany the red and green,” said Pacific Northwest National Lab (PNNL) scientist Asanga Padmaperuma.

Development of better host materials to manage the flow of electricity through the device could help solve that problem.

Padmaperuma and his colleagues have designed, synthesised and tested new materials that improve the power efficiency of blue OLEDs by at least 25 percent, said a PNNL release.

PNNL scientists presented these advancements at the spring meeting of the American Chemical Society.

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