High-Quality White Light Generation using Dually Hybridized Nanocrystals and Conjugated Polymers

Hybridizing different sizes of CdSe/ZnS core-shell nanocrystal emitters layer by layer with highly fluorescent polyfluorene as conjugated polymer on n-UV InGaN/GaN LEDs, we achieved high-quality white light with color rendering index > 80, fulfilling the future solid state lighting requirement. Here we also demonstrated the ability to tune the white light properties as desired by carefully designing and realizing the hybrid device parameters including the type and film thickness of closely-packed NC emitters, the concentration and film thickness of polymer emitters, and the order of NC and polymer films. Given their high light quality and tunable optical properties, these hybrid organic-inorganic white light sources provide a high potential for future lighting and display applications.