A 15-centimetre silicon wafer costs just $15 and can accommodate 150,000 LEDs making the cost per unit tiny. That levels the playing field with CFLs, which many people only ever saw as a stopgap solution to the lighting problem.
Humphreys reckons that the UK government encouraged consumers to drop tungsten bulbs too soon. "We should have stayed with tungsten for another five years and then switched to LEDs," he says.
Humphreys's team was funded by the UK Engineering and Physical Sciences Research Council. The UK government's Technology Strategy Board will now provide the funding to turn the new technology into a commercial process.
Thursday, January 29, 2009
Super-cheap LEDs! I like this bit: