Silica nanowires as new coating material for high-efficiency light reflection in LED system

Randomly distributed silica nanowires show highly reflectivity in the whole visible wavelength, which can be used as white light coating for high-efficiency optoelectronic packaging as affirmed by our previous work. In this work, an improved process has been developed to recombine the silica nanowires as optical coating of LED reflector cup to form diffusive reflecting surface in LED packaging. This recombination was realized through two-step process: the synthesized silica nanowires were first dispersed in distilled water via artful magnetic stirring and then absorbed on specular surface by Van der Waals' force. This work provides an alternative and low-cost method for the improvement of lighting systems.