Turkey team research and development of high efficiency LED, luminescence efficiency is greatly improved

The University College of Cork (Ko C University) research team in the city of Istanbul, Turkey, developed an efficient LED. The researchers placed the quantum dots in the liquid directly in the LED device, and the luminous efficiency was 50% higher than that at the solid quantum dot.

The researchers covered LED with a transparent polymethylsiloxane (PDMS) lens and injected the liquid with a colloidal quantum dot in the lens to make color conversion luminescence. The injection hole of this lens is automatically repaired after injection of liquid to prevent leakage of liquid.

The researchers point out that when the quantum dots are taken out of the liquid and used in the form of solid state, the emission efficiency will be reduced. The efficiency of the loss is called the matrix effect. Through the liquid, high quantum yield and adjustable quantum dots, the researchers succeeded in inhibiting the production of the matrix effect.

Due to the decrease of the matrix effect, the luminous efficiency is also greatly increased in LED with red, blue and green light as the light source. Each watt can be 64 LM, with green and blue LED as the light source, which can reach 105 LM per watt.

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