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MIT News
Discovery could lead to brighter, more energy-efficient digital displays
Discovery could lead to brighter, more energy-efficient digital displays
Researchers found a simple solution for extending the lifespans of LEDs made from glowing microscopic particles called quantum dots.
Adam Zewe<br>MIT News
Publication Date:
July 10, 2026
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MIT researchers studied the microscopic changes that occur inside LEDs that utilize electrically-excited quantum dots, which are nanoscale particles that emit extremely pure colored light. Their insights could be used to make advanced, more energy-efficient QD-LED displays commercially viable for applications like flat-screen TVs and medical imaging devices.
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Credit: Courtesy of the researchers
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Caption:
MIT researchers studied the microscopic changes that occur inside LEDs that utilize electrically-excited quantum dots, which are nanoscale particles that emit extremely pure colored light. Their insights could be used to make advanced, more energy-efficient QD-LED displays commercially viable for applications like flat-screen TVs and medical imaging devices.
Credits:
Credit: Courtesy of the researchers
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A new study led by MIT researchers could drive the development of more energy-efficient digital displays — such as flat-screen TVs, augmented and virtual reality headsets, smartphone screens, medical imaging devices, and even large-area ambient lighting surfaces — that also generate richer, brighter colors.<br>The MIT scientists, in collaboration with researchers at Samsung, studied the microscopic changes that occur inside LEDs that utilize electrically excited quantum dots, which are precisely shaped nanoscale semiconductor particles that emit extremely pure colored light.<br>Quantum dots are currently used in some of the computer and television displays with the best picture quality available. The efficiency of these displays could be further improved, and their manufacturing process further simplified, if the quantum dots could be electrically excited, as was first demonstrated in the quantum dot LED (QD-LED) structures over 20 years ago.<br>But limitations on the operating lifespans of these QD-LEDs have prevented their widespread use in commercial applications.<br>The new study shows how encapsulating QD-LEDs in an acrylate-based resin can extend their lifespan by minimizing the physical degradation that would otherwise occur during QD-LED operation.<br>The researchers demonstrated that encapsulating QD-LEDs with a resin layer using a simple, scalable process boosts stability and performance. In some devices, resin encapsulation enabled a 5,000-fold lifespan improvement. Importantly, their study reveals the fundamental reasons resin encapsulation is effective.<br>“The insights into how and why quantum dot LEDs get modified during their operation open the possibility of fixing everything that holds back commercialization of QD-LED displays. This technology can provide a light source like never before — pure in color, paper thin, and of large area, transforming how we produce both displays and general lighting,” says Vladimir Bulović, the Fariborz Maseeh (1990) Professor of Emerging Technology, principal investigator in the Research Laboratory of Electronics (RLE), director of MIT.nano, and senior author of this...