Thursday, 31 October 2013 12:15

Materials Day: Colloidal quantum dots

    Research into using colloidal quantum dots is about a decade away from where OLEDs are today, Professor Vladimir Bulovic, Director of the Microsystems Technology Lab at MIT, said. “By changing the size of the dot, you can change the color of the dot,” he said.


    Lighting applications are expected. A piece of glass coated with quantum dots can add the red color missing from lighting systems with only blue and yellow phosphors. One advantage quantum dots have over phosphors is that quantum dots produce three times as many perceived photons as phosphors. Bulovic spoke at the Materials Day Symposium, hosted by the Materials Processing Center Oct. 23, 2013. The daylong symposium was held in Little Kresge Auditorium on the MIT campus.

    “We may as well come up with a light bulb that changes the way we think about what LED lighting can give us. There is an up and coming market with the drop in the price of gallium nitride. There is significant opportunity to more broadly dispense LED technology. It’s going to last you 10 years once you install it, it’s going to give you more efficient energy use. The only issue with LED technology as we know it today is that the color is not quite right and quantum dots really are a solution for that,” Bulovic said. After a year’s use, QD performance is slightly better than at the beginning.

    QD Vision, a start up out of MIT, which is commercializing these technologies, has grown to 150 people in Massachusetts and more than 200 in Taiwan. Sony introduced QD Vision’s “Color IQ” technology in some high-end Bravia TV’s this year. The tighter the connection is between industry and research labs, “the more quickly technology will be deployed in industry,” Bulovic said.

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    Last modified on Thursday, 31 October 2013 16:31