Optical Properties of Transparent Wavelength-Conversion Film Prepared from YVO4 : Bi3 + , Eu3 + Nanophosphors

Abstract

The optical properties of the transparent wavelength-conversion film containing 38.8 wt % nanoparticles of in size are compared to that of the film containing 30.0 wt % micron-sized particles of in size. The photoluminescence intensity at 619 nm corresponding to the f–f transition of for the film containing nanoparticles increases with increasing the film thickness up to , whereas that of the film containing micron-sized particles reaches the maximum at the film thickness of . The transmittance at 619 nm for the former is irrespective of the film thickness, whereas that is less than 0.17% for the latter. These results suggest that the transparent film of nanoparticles has markedly low light-scattering loss.