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Scientists have developed several types of LED including OLEDs, quantum-dot-based LEDs (QLED), perovskite-based LEDs and Micro LEDs for the purpose of enhancing the brightness, contrast and resolution of displays as well as to reduce the production cost and energy use. A new research published on Nature has illustrated a development of OLEDs using free radicals which generate doublet emission with higher efficiency.
In the research, scientists from China and the UK have demonstrated radical-based OLEDs that could reach an external quantum efficiency of 27 percent at a wavelength of 710 nanometers, which is the highest record reported for deep-red and infrared LEDs.
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