Enhancement of long persistent phosphorescence by chemical mixing of two or more phosphorescent phosphors with spectral overlap

摘要

The present invention relates to a photoluminescent material, and more particularly to a photoluminescent material having improved luminance and afterglow time. Photoluminescence is disadvantageous in practical use because it has a weaker luminance on the light emitting mechanism than fluorescence. In order to improve these disadvantages, a photoluminescent material having improved luminance and long afterglow time was prepared by chemically mixing two or more kinds of photoluminescent materials having an increased spectral overlap between the emission spectrum and the absorption spectrum.;Photoluminescence, phosphorescence, emission spectrum, spectral overlap, absorption spectrum, luminance, afterglow, zinc sulfide based photoluminescent material, aluminate based photoluminescent material, silicate based photoluminescent material