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Miami miniaturises LED lighting

Using indium gallium nitride on a silicon substrate, novel etching, layout and thermal management strategies, researchers have produced much smaller and lower temperature LEDs than current LEDs using the same electrical power.

University of Miami professor at the College of Engineering, Jizhou Song, has helped design an LED light that uses an array of LEDs 100 times smaller than conventional LEDs.

The institute says that the new device has flexibility, maintains lower temperature and has an increased life-span over existing LEDs. The findings are published online by the “Proceedings of the National Academy of Science.”

In this study, the scientists focused on improving certain features of LED lights, like size, flexibility and temperature. Song’s role in the project was to analyse the thermal management and establish an analytical model that reduces the temperature of the device.

“The new model uses a silicon substrate, novel etching strategies, a unique layout and innovative thermal management method,” says Song, co-author of the study. “The combination of these manufacturing techniques allows the new design to be much smaller and keep lower temperatures than current LEDs using the same electrical power.”

In the future, the researchers intend to make the device stretchable, allowing them to be used on any surface, such as deformable display monitors and biomedical devices that adapt to the curvilinear surfaces of the human body.

More details of this work are published in the paper “Unusual Strategies for Using InGaN Grown on Silicon (111) for Solid State Lighting” by J. Rogers, R. Nuzzo, G. L. Clark, Y Huang and J Cummings.
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