US Patent:
20150069430, Mar 12, 2015
Inventors:
- Durham NC, US
Matthew Donofrio - Raleigh NC, US
Kevin W. Haberern - Cary NC, US
Bennett Langsdorf - Cary NC, US
Anoop Mathew - Raleigh NC, US
Harry A. Seibel - Morrisville NC, US
Iliya Todorov - Durham NC, US
Bradley E. Williams - Cary NC, US
International Classification:
H01L 33/50
H01L 27/15
Abstract:
A phosphor-converted light emitting device includes a light emitting diode (LED) on a substrate, where the LED comprises a stack of epitaxial layers comprising a p-n junction. A wavelength conversion material is in optical communication with the LED. According to one embodiment of the phosphor-converted light emitting device, a selective filter is adjacent to the wavelength conversion material, and the selective filter comprises a plurality of nanoparticles for absorbing light from the LED not down-converted by the wavelength conversion material. According to another embodiment of the phosphor-converted light emitting device, a perpendicular distance between a perimeter of the LED on the substrate and an edge of the substrate is at least about 24 microns. According to another embodiment of the phosphor-converted light emitting device, the LED comprises a mirror layer on one or more sidewalls thereof for reducing light leakage through the sidewalls.