| New record for light-emitting silicon |
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White LEDs on silicon substrates cut costs by 75 percent. It argues that American BRIDGELUX hits new record light.
The development company BRIDGELUX in California have shown up LEDs that
provide 160 lumens per watt, a new record for the diodes produced on
silicon substrates. Record diodes is said to give a cool white light
with a color temperature of 4350 Kelvin. The company also shows up
diodes that provide a warmer light, with color temperature of 2940
Kelvin. But then the light output lower, 125 lumens per watt.
What is interesting is the production technology in which
light-emitting gallium nitride grows on silicon wafers. This allows you
as the company cut costs by 75 percent compared with today's LEDs
produced on expensive substrates of silicon carbide or sapphire.
Another advantage is that you can use larger substrates, thereby
attracting more LEDs. For the new diodes have BRIDGELUX used 8-inch
substrates. In addition, there are plenty of manufacturers of silicon
substrates in the semiconductor industry.
A challenge for technology is that gallium nitride and silicon have
different thermal characteristics, which can cause cracks or bends in
the material. The problem goes BRIDGELUX have solved with their process.
So far, these are prototypes in the laboratory. Within two years they
shall be on the market, according to the company. If the company
succeeds, it may mean a major breakthrough for lowering the cost of LED
lamps.
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| Last Updated ( Saturday, 13 August 2011 ) |
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