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Researchers Demonstrate Efficiency of Radical-Based OLEDs

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Radicals — semiconducting molecules with unpaired electrons — can be used to fabricate highly efficient OLEDs, according to scientists at the University of Cambridge and Jilin University. Using a luminescent radical emitter, the researchers demonstrated an OLED with maximum external quantum efficiency of 27 percent, at a wavelength of 710 nm. According to the team, this is the highest reported value thus far for deep-red and IR LEDs. The emission process of the radical-based OLEDs originates from a spin doublet, rather than a singlet or triplet exciton. Stabilized radicals...Read full article

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