Silicon nanoparticle white light emitting diode device
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United States of America Patent
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Aug 2, 2011
Grant Date -
Jan 28, 2010
app pub date -
Jan 15, 2009
filing date -
Jan 15, 2008
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Abstract
Multiple films of red-green-blue (RGB) luminescent silicon nanoparticles are integrated in a cascade configuration as a top coating in an ultraviolet/blue light emitting diode (LED) to convert it to a white LED. The configuration of RGB luminescent silicon nanoparticle films harnesses the short wavelength portion of the light emitted from the UV/blue LED while transmitting efficiently the longer wavelength portion. The configuration also reduces damaging heat and/or ultraviolet effects to both the device and to humans.
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