UCSB researchers warn that trace amounts of transition metal impurities act as recombination centers in gallium nitride semiconductors
College of Engineering News
Schematic illustration of Shockley-Read-Hall (SRH) recombination due to iron in GaN. Iron is a deep acceptor with a defect level (black line) close to the GaN conduction band (green). The charge density corresponding to this localized level is illustrated in the middle of the figure. Conventional SRH recombination (left) would proceed via electron capture from the conduction band into the defect level, but the overall rate would be limited by slow capture of holes because the defect level is far from the valence band (blue). The presence of excited states enhances the hole capture rate (right) such that the overall SRH recombination process becomes very efficient.
Nov 04, 2016
Nov 02, 2016
$550K NSF grant helps Computer Science Professor Elizabeth Belding bring wireless technology to rural inland native communities
Researchers: Dr. Gina Adam (left) and Professor Dmitri Strukov
Oct 31, 2016
Key to this development is the use of a logic system called material implication logic combined with memristors
The International Space Station, image courtesty of NASA.
Oct 03, 2016
Professors Meiburg and Luzzatto-Fegiz awareded NSF grant to design sediment fluid mechanics study to be conducted in zero gravity
Concept art of the crystal structure (top view) of AB-stacked bilayer graphene. Credit: Peter Allen, UCSB
Sep 20, 2016
Physics Today article co-written by Professor Kaustav Banerjee dives into the physics, technology, and device applications of 2D materials such as graphene
Sep 08, 2016
Mechanical Engineering Professor Carl Meinhart reflects on how growing up on a farm inspired him to pursue mechanical engineering and groundbreaking microfluidics research.
Aug 18, 2016
Materials researchers at UCSB have observed a rare single-element infinite iodide polymer chain
Aug 10, 2016
Professor Yon Visell's haptics research group maps the hand's touch sensation by mapping vibration on the skin at a fast resolution
Aug 01, 2016
Pokémon Go presents little risk of information leaks, according to Professor Ben Zhao, but a social component could make it vulnerable to hackers
Jul 12, 2016
MaterialsViews spotlights research in the Schuller Lab which proposes a new route for electrically reconfigurable metasurfaces, an important step towards on-chip programmable optics.
Jul 07, 2016
Chemical engineer Michelle O'Malley's award-winning bioengineering research is inspired by "nature's engineers," the gut fungi of large herbivores.
Jun 29, 2016
UCSB Sustainability Champion Professor Chandra Krintz enables smarter, more sustainble farming through technology
- ‹ previous
- 28 of 29
- next ›