SSL Technologies

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Nanoscale Effects on Heterojunction Electron Gases in GaN/AlGaN Core/Shell Nanowires

June 22, 2011 [singlepic id=978 w=320 h=240 float=right] In a paper titled “Nanoscale Effects on Heterojunction Electron Gases in GaN/AlGaN Core/Shell Nanowires” published in Nano Letters, Sandia scientist Bryan M. Wong, and EFRC scientists François Léonard, Qiming Li, and George T. Wang, present a theoretical  and computational study of the electronic properties of core/shell nanowires.  They [...]

By |August 15th, 2011|News, Solid-State Lighting|Comments Off on Nanoscale Effects on Heterojunction Electron Gases in GaN/AlGaN Core/Shell Nanowires

Jeff Tsao participates in “Energy Efficiency and the Rebound Effect” Workshop

June 27-28, 2011 [singlepic id=979 w=320 h=240 float=right] The rebound (or take-back) effect) is the term in energy economics used to describe the effectin which increases in energy efficiency do not necessarily lead to simple 1:1 decreases in energy consumption, but instead are “taken back” in the form of higher consumption of the goods and [...]

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Four-color laser white illuminant demonstrating high color-rendering quality

July 4, 2011 [singlepic id=980 w=320 h=240 float=right]Solid-state lighting is currently based on light-emitting diodes (LEDs) and phosphors.  Solid-state lighting based on lasers would offer significant advantages including high potential efficiencies at high current densities. Light emitted from lasers, however, has a much narrower spectral linewidth than light emitted from LEDs or phosphors.  Therefore it [...]

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Light Creation Materials

Light Creation Materials Different families of inorganic semiconductor materials can contribute to solid-state white lighting. The primary chemical systems used for LEDs are Group-III nitrides and Group-III phosphides. It is, however, possible that breakthroughs in a different material system, for example ZnO, will be important. AlGaInN Materials LEDs based on gallium nitride (GaN) and ternary [...]

By |July 14th, 2011|Comments Off on Light Creation Materials

Wavelength Conversion Materials

Rare-Earth Phosphors Inorganic phosphors doped with rare-earth metals are used for a variety of applications. A wide array of these phosphors has been developed for use with fluorescent lamps. The first SSL white LEDs have used an yttrium aluminum garnet doped with trivalent cerium (YAG:Ce+3) to convert output from a blue LED into very [...]

By |July 14th, 2011|Comments Off on Wavelength Conversion Materials