RPI ID: 2013-050-403
Innovation Summary: This invention introduces phosphor-functionalized nanoparticles consisting of an inorganic nanoparticle core with long- and short-chain surface polymers and organic phosphors. The controlled grafting densities of polymers enable uniform phosphor dispersion, improving optical transparency and efficiency. The nanoparticles can be incorporated into polymer matrices, LEDs, and lighting devices, overcoming limitations of rare-earth phosphors such as resource depletion, poor dispersion, and limited color tuning. The design enhances light extraction efficiency and color rendering while reducing scattering losses in encapsulation materials. The system can also carry multifunctional properties like conductivity and color conversion, offering flexibility across optical applications.
Challenges / Opportunities: Challenges include scaling up the nanoparticle functionalization process with consistent quality, ensuring cost-effective manufacturing, and optimizing polymer-phosphor compatibility. Opportunities exist in replacing rare-earth phosphors, reducing environmental and supply-chain risks. There is also significant potential in consumer electronics, solid-state lighting, and displays where high efficiency and color quality are critical. Further opportunities include integration into smart lighting systems and advanced optical sensors.
Key Benefits / Advantages: ✔ Improved light extraction efficiency ✔ Superior color rendering ✔ Uniform dispersion of phosphors ✔ Reduced reliance on rare-earth materials ✔ High optical transparency
Applications: • LEDs and backlighting • Solid-state lighting • Optical sensors • Displays and projectors • Smart lighting systems
Keywords: nanoparticles, phosphor, LEDs, optical materials, rare-earth alternatives
Intellectual Property: Issued US Patent No. 9,773,953