Enhanced Optical Efficiency Package Incorporating Nanotechnology Based Downconverter and High Refractive Index Encapsulant for AIInGaN High-Flux White Led Lamp with High Luminous Efficiency

72552S03-I Current white solid state lamps that exceed 100 lumens have a luminous efficacy 2.5 times lower than the threshold required for insertion in illumination applications, and a cost that is ten times too high. Performance-enhancing nanomaterials could increase efficiency if packaged with enhanced light extraction efficiency from an LED-chip. This project will enhance both the Package Optical Efficiency and Light Extraction Efficiency of the LED die by developing and using optically non-scattering, highly efficient, nanophosphor-based downconverters and high refractive index nanocomposite LED die/chip encapsulants. The resultant light output of the high-flux lamp would exceed 450 lumens, corresponding to a luminous efficacy of 95 lumens/Watt using current die technology. With future improved LED materials, the luminous efficacy would be expected to reach 150 lumens/Watt. Phase I will develop nanophosphors for downconverters and high refractive nanocomposites for encapsulants, that can be integrated into high flux, high power, white LED lamp packages operating at temperatures greater than 80¿C and having optical intensities exceeding several kilowatts/cm2. Commercial Applications and Other Benefits as described by awardee: Successful application of solid state lighting devices in general illumination applications (including commercial and industrial buildings, residences, and other outdoor applications) should provide significant economic and environmental benefits.