Novel RGB Phosphors for Solid State Lighting
Develop a novel set of red, green and blue phosphors specifically designed to work with near-ultraviolet light-emitting diodes to enable high-efficiency LED lamps that rival incandescent bulbs for color quality and light intensity while using about a tenth the power.
Sponsor: Lightscape Materials, Inc. (formerly Sarnoff Corporation)201 Washington Road
Princeton, NJ 08540
About 20 percent of U.S. energy consumption is used for lighting. By some estimates, solid-state lighting (lamps based on light-emitting diodes) could reduce national energy consumption by about seven percent or $20 billion a year if incandescent lamps were replaced by high-quality LED illuminators with an efficiency of 150 lumens per Watt. Unfortunately, the phosphors currently used in white LED lamps are not optimized for near-ultraviolet LEDs and do not produce the high-quality white light associated with incandescent bulbs. Sarnoff Corporation recently discovered a group of novel red, green and blue phosphor materials that the company believes can be developed into high efficiency phosphors (quantum efficiencies greater than 90 percent) specifically tailored to work with near-ultraviolet LEDs. Technical challenges include: achieving very high efficiency, process control, desired particle shape and uniformity, and long-term stability. If successful, Sarnoff believes these high performance phosphors will enable lamp makers to design high-performance LED lamps that rival incandescent bulbs for color quality and light intensity while using about a tenth the power.