Optical tuning of phosphors by plasmonic gold nanoparticles for phosphor-converted white light emitting diodes

Abstract

We report a localized surface plasmonic enhanced phosphor using Au nanoparticles. The method is simple and widely used for various phosphor materials. When the localized surface plasmon resonance of Au nanoparticles matches the emission wavelength of the phosphor materials, the efficiency of the phosphor is enhanced. The phosphor luminance intensity is enhanced with the application of an optimum concentration of Au nanoparticles. In order to check the wavelength-dependent effect of localized surface plasmon resonance, we experimented with different phosphor materials, having emission wavelength peaks at 520nm, 560nm, and 620nm. We found the differences in plasmonic enhancement by the wavelength dependency.