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. Blue Light Specials

New, more efficient host materials for the blue phosphorescent OLED (pictured) have been designed, developed and tested by Pacific Northwest National Laboratory scientists. By using new host materials, scientists have been able to improve the efficiency by at least 25 percent and have unlocked doors to developing much more efficient white OLEDs. Credit: Pacific Northwest National Laboratory
by Staff Writers
Salt Lake City UT (SPX) Mar 27, 2009
Lighting consumes one-fifth of the electricity generated in the United States. Solid-state lighting offers tremendous potential to improve the situation - once major research challenges are overcome.

The most promising technology is the organic light-emitting diode, or OLED. These multi-layered devices produce light by running an electrical 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 Laboratory 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 collegues have designed, synthesized and tested new materials that improve the power efficiency of blue OLEDs by at least 25 percent.

On Sunday, March 22, PNNL scientists will discuss advancements in blue OLED research in two presentations and a poster session at the spring meeting of the American Chemical Society.

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Ice That Burns May Be Bridge To Sustainable Global Energy Future
Salt Lake City UT (SPX) Mar 27, 2009
In the future, natural gas derived from chunks of ice that workers collect from beneath the ocean floor and beneath the arctic permafrost may fuel cars, heat homes, and power factories.

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