Communications of the ACM
Making Monitors Brighter: Researchers in Bayreuth Discover a Way to Control the Color of OLEDs
University of Bayreuth researchers have determined how the spatial structure of conjugated polymers can be used to control the colors of organic light-emitting diodes, and help to increase the brightness of monitors.
Credit: Dominic Raithel
Researchers at the University of Bayreuth in Germany have discovered how the spatial structure of conjugated polymers can be used to control the colors of organic light-emitting diodes (OLEDs) and help increase the brightness of monitors.
The polymers studied by the Bayreuth researchers have backbones that are chemically identical and bent to different degrees, but the excitation energy always spreads over the same distance. Bent polymers emit green or blue light, while elongated polymers radiate yellow or red light.
"When these polymers come to be used in organic light-emitting diodes, their various spatial structures can be utilized to precisely control the color of the light emit from the OLEDs," says Bayreuth's Dominic Raithel.
In addition, the researchers found the elongated polymers possess a scaffold formed by its side chains, which stabilizes the elongated structure without weakening the optical emission.
From University of Bayreuth
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