2009-03-11

Oxford Instruments - TDI unites LED maker develop semi-polar GaN

Group III-nitride materials have been widely used for visible and ultraviolet LEDs and blue, violet laser diodes in the past decade. Most of these optoelectronic devices are typically fabricated on the conventional polar (0001) c-plane oriented substrate materials. Devices grown on the polar substrate orientation suffer undesirable spontaneous and piezoelectric polarization resulting in significant band bending in the quantum well. This reduces radiative recombination efficiency and lowers device performance.
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Ennostar today announced a breakthrough in Micro LED optical communications. The company’s R&D team has increased the single-channel -3 dB modulation bandwidth of its blue Micro LED to 2.1 GHz at a current density of 2 kA/cm². The ... READ MORE

Daktronics of Brookings, South Dakota, was asked to refresh the video display and control system at the University of Texas, El Paso’s (UTEP) Sun Bowl Stadium. The display improved resolution 4.5 times the previous screen using the Daktr... READ MORE