Oak Ridge Today

Thinner, flexible tablets, TVs possible through UT research, visiting ORNL scientist

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David Mandrus, Stephen Pennycook, and Jiaqing Yen

David Mandrus, Stephen Pennycook, and Jiaqiang Yan, from left, recently helped in a Vanderbilt-led project that could result in paper-thin, flexible tablets and TVs. (Photo courtesy University of Tennessee)

KNOXVILLE—Researchers from the University of Tennessee in Knoxville recently garnered national attention for their part in a study that could lead to the development of tablets, televisions, and mobile devices the width of a piece of paper.

First published in Nature, the article details how researchers have been able to create wires only three atoms wide using an electron beam.

The lead researcher on the project was Vanderbilt Ph.D. student Junhao Lin, who was a visiting scientist at Oak Ridge National Laboratory at the time.

Through the ORNL connection, UT’s Stephen Pennycook, David Mandrus, and Jiaqiang Yan—all of the College of Engineering’s Department of Materials Science and Engineering—got involved. [Read more…]

UT, ORNL part of breakthrough that reduces LED sizes

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2-D LED Light Image

This graphical representation shows the layers of the 2-D LED and how it emits light. (Image courtesy University of Washington)

SEATTLE—University of Washington scientists have built the thinnest-known LED that can be used as a source of light energy in electronics, thanks in part to a breakthrough by researchers at Oak Ridge National Laboratory and University of Tennessee in Knoxville.

The LED is based off of two-dimensional, flexible semiconductors, making it possible to stack or use in much smaller and more diverse applications than current technology allows.

“We are able to make the thinnest-possible LEDs, only three atoms thick yet mechanically strong,” said Xiaodong Xu, a UW assistant professor in materials science and engineering and in physics. “Such thin and foldable LEDs are critical for future portable and integrated electronic devices.”

Most consumer electronics use three-dimensional LEDs, but they are up to 20 times thicker than the LEDs being developed. [Read more…]

Thompson-Boling lights brighter, more efficient; use ORNL foam

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Thompson-Boling LED Lighting

The SuperSport installation at the University of Tennessee’s Thompson-Boling Arena. (Photo credit: LED North America)

KNOXVILLE—With the installation of LED fixtures, the Thompson-Boling Arena at the University of Tennessee in Knoxville is one of the first in the world to feature lights that are smaller, brighter, and up to 85 percent more efficient than conventional arena metal halide lights.

The technology—developed and manufactured by Oak Ridge-based LED North America at the Tech 20/20 incubator facility in Oak Ridge, incorporating an Oak Ridge National Laboratory technology, and installed by Knoxville-based Bandit Lites—is being “premiered” at the state’s research university inside the largest on-campus single-sport arena in the country.

The light-emitting diode fixtures use an ORNL-developed lightweight graphite foam that cools the LED, making them more efficient and reliable. This enables 90 400-watt LED fixtures to bathe the arena’s floor with 200 foot-candles per square foot, compared to the 130 foot-candles produced by the arena’s existing 110 1,100-watt fixtures.

LED North America’s SuperSport luminaires have the potential to revolutionize sports and entertainment venues worldwide. UT officials are looking forward to participating in this effort and to seeing the results—and the savings. [Read more…]