Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:


New UT Dallas Technology May Lead to Prolonged Power in Mobile Devices


Team Taps the Power of Single Electron

Researchers from The University of Texas at Dallas have created technology that could be the first step toward wearable computers with self-contained power sources or, more immediately, a smartphone that doesn’t die after a few hours of heavy use.

This technology, published online in Nature Communications, taps into the power of a single electron to control energy consumption inside transistors, which are at the core of most modern electronic systems.

Researchers from the Erik Jonsson School of Engineering and Computer Science found that by adding a specific atomic thin film layer to a transistor, the layer acted as a filter for the energy that passed through it at room temperature. The signal that resulted from the device was six to seven times steeper than that of traditional devices. Steep devices use less voltage but still have a strong signal.

“The whole semiconductor industry is looking for steep devices because they are key to having small, powerful, mobile devices with many functions that operate quickly without spending a lot of battery power,” said Dr. Jiyoung Kim, professor of materials science and engineering in the Jonsson School and an author of the paper. “Our device is one solution to make this happen.”

Tapping into the unique and subtle behavior of a single electron is the most energy-efficient way to transmit signals in electronic devices. Since the signal is so small, it can be easily diluted by thermal noises at room temperature. To see this quantum signal, engineers and scientists who build electronic devices typically use external cooling techniques to compensate for the thermal energy in the electron environment. The filter created by the UT Dallas researchers is one route to effectively filter out the thermal noise.

Dr. Kyeongjae “K.J.” Cho, professor of materials science and engineering and physics and an author of the paper, agreed that transistors made from this filtering technique could revolutionize the semiconductor industry.

“Having to cool the thermal spread in modern transistors limits how small consumer electronics can be made,” said Cho, who used advanced modeling techniques to explain the lab phenomena. “We devised a technique to cool the electrons internally — allowing reduction in operating voltage — so that we can create even smaller, more power efficient devices.”

Each time a device such as a smartphone or a tablet computes it requires electrical power for operation. Reducing operating voltage would mean longer shelf lives for these products and others. Lower power devices could mean computers worn with or on top of clothing that would not require an outside power source, among other things.

To create this technology, researchers added a chromium oxide thin film onto the device. That layer, at room temperature of about 80 degrees Fahrenheit, filtered the cooler, stable electrons and provided stability to the device. Normally, that stability is achieved by cooling the entire electronic semiconductor device to cryogenic temperatures — about minus 321 degrees Fahrenheit.

Another innovation used to create this technology was a vertical layering system, which would be more practical as devices get smaller.

“One way to shrink the size of the device is by making it vertical, so the current flows from top to bottom instead of the traditional left to right,” said Kim, who added the thin layer to the device.

Lab test results showed that the device at room temperature had a signal strength of electrons similar to conventional devices at minus 378 degrees Fahrenheit. The signal maintained all other properties. Researchers will also try this technique on electrons that are manipulated through optoelectronic and spintronic — light and magnetic — means.
The next step is to extend this filtering system to semiconductors manufactured in Complementary Metal-Oxide Semiconductor (CMOS) technology.

“Electronics of the past were based on vacuum tubes,” Cho said. “Those devices were big and required a lot of power. Then the field went to bipolar transistors manufactured in CMOS technology. We are now again facing an energy crisis, and this is one solution to reduce energy as devices get smaller and smaller.”

Researchers from the Lam Research Corporation in California, Nankai University in China, the University of Michigan and the University of Texas at Arlington contributed to this work.

The work was funded by the Office of Naval Research and the National Science Foundation.

Contact Information

LaKisha Ladson
Communications Manager
Phone: 972-883-4183
Mobile: 469-363-0231

LaKisha Ladson | newswise

More articles from Power and Electrical Engineering:

nachricht Neutrons pave the way to accelerated production of lithium-ion cells
20.03.2018 | Technische Universität München

nachricht Monocrystalline silicon thin film for cost-cutting solar cells with 10-times faster growth rate fabricated
16.03.2018 | Tokyo Institute of Technology

All articles from Power and Electrical Engineering >>>

The most recent press releases about innovation >>>

Die letzten 5 Focus-News des innovations-reports im Überblick:

Im Focus: Space observation with radar to secure Germany's space infrastructure

Satellites in near-Earth orbit are at risk due to the steady increase in space debris. But their mission in the areas of telecommunications, navigation or weather forecasts is essential for society. Fraunhofer FHR therefore develops radar-based systems which allow the detection, tracking and cataloging of even the smallest particles of debris. Satellite operators who have access to our data are in a better position to plan evasive maneuvers and prevent destructive collisions. From April, 25-29 2018, Fraunhofer FHR and its partners will exhibit the complementary radar systems TIRA and GESTRA as well as the latest radar techniques for space observation across three stands at the ILA Berlin.

The "traffic situation" in space is very tense: the Earth is currently being orbited not only by countless satellites but also by a large volume of space...

Im Focus: Researchers Discover New Anti-Cancer Protein

An international team of researchers has discovered a new anti-cancer protein. The protein, called LHPP, prevents the uncontrolled proliferation of cancer cells in the liver. The researchers led by Prof. Michael N. Hall from the Biozentrum, University of Basel, report in “Nature” that LHPP can also serve as a biomarker for the diagnosis and prognosis of liver cancer.

The incidence of liver cancer, also known as hepatocellular carcinoma, is steadily increasing. In the last twenty years, the number of cases has almost doubled...

Im Focus: Researchers at Fraunhofer monitor re-entry of Chinese space station Tiangong-1

In just a few weeks from now, the Chinese space station Tiangong-1 will re-enter the Earth's atmosphere where it will to a large extent burn up. It is possible that some debris will reach the Earth's surface. Tiangong-1 is orbiting the Earth uncontrolled at a speed of approx. 29,000 km/h.Currently the prognosis relating to the time of impact currently lies within a window of several days. The scientists at Fraunhofer FHR have already been monitoring Tiangong-1 for a number of weeks with their TIRA system, one of the most powerful space observation radars in the world, with a view to supporting the German Space Situational Awareness Center and the ESA with their re-entry forecasts.

Following the loss of radio contact with Tiangong-1 in 2016 and due to the low orbital height, it is now inevitable that the Chinese space station will...

Im Focus: Alliance „OLED Licht Forum“ – Key partner for OLED lighting solutions

Fraunhofer Institute for Organic Electronics, Electron Beam and Plasma Technology FEP, provider of research and development services for OLED lighting solutions, announces the founding of the “OLED Licht Forum” and presents latest OLED design and lighting solutions during light+building, from March 18th – 23rd, 2018 in Frankfurt a.M./Germany, at booth no. F91 in Hall 4.0.

They are united in their passion for OLED (organic light emitting diodes) lighting with all of its unique facets and application possibilities. Thus experts in...

Im Focus: Mars' oceans formed early, possibly aided by massive volcanic eruptions

Oceans formed before Tharsis and evolved together, shaping climate history of Mars

A new scenario seeking to explain how Mars' putative oceans came and went over the last 4 billion years implies that the oceans formed several hundred million...

All Focus news of the innovation-report >>>



Industry & Economy
Event News

New solar solutions for sustainable buildings and cities

23.03.2018 | Event News

Virtual reality conference comes to Reutlingen

19.03.2018 | Event News

Ultrafast Wireless and Chip Design at the DATE Conference in Dresden

16.03.2018 | Event News

Latest News

For graphite pellets, just add elbow grease

23.03.2018 | Materials Sciences

Unique communication strategy discovered in stem cell pathway controlling plant growth

23.03.2018 | Agricultural and Forestry Science

Sharpening the X-ray view of the nanocosm

23.03.2018 | Physics and Astronomy

Science & Research
Overview of more VideoLinks >>>