Science Daily April 14, 2022 Graphene-hBN structures can power LEDs that generate deep-UV light, which is impossible in today’s LEDs. Previous efforts to get ordered rows of hBN atoms that align with the graphene underneath were not successful. A team of researchers in the US (University of Michigan, Ohio State University, Yale University) discovered that neat rows of hBN atoms are more stable at high temperature than the undesirable jagged formations. They used a terraced graphene substrate and heated it to around 1600 degrees Celsius before spraying on individual boron and active nitrogen atoms resulting in neatly ordered seams of […]
Tag Archives: LEDs
An LED that can be integrated directly into computer chips
MIT News December 14, 2020 LEDs can be used as proximity sensors in smartphones, distance measurement in autofocus cameras, and gesture recognizers. As they are difficult to make from silicon, the LED sensors must be manufactured separately from their device’s silicon-based processing chip making them prohibitively expensive. Researchers at MIT have designed a silicon-based LED with specially engineered junctions to enhance brightness. The LED operates at low voltage, but it still produces enough light to transmit a signal through 5 meters of fiber optic cable. They envision a day when LED technology can be built right onto a device’s silicon […]