Development of phosphor
Phosphorescent materials have attracted considerable attention with respect to a wide range of applications in organic light emitting devices (OLEDs) and glow-in-the-dark materials, which are charged with bright light such as room light. Unlike a fluorescent material, a phosphorescent material releases generally weak light, very slowly in the dark, due to forbidden energy state transitions, instead of re-emitting the light immediately. Therefore, the development of phosphorescent emitters with a high phosphorescence quantum yield at room temperature has been considered important.
Our lab develops persistent phosphors with afterglow characteristics superior to those of conventional phosphors and this investigation are expected to act as a guideline for the synthesis of bright and long persistent phosphors, and open up an unexpectedly large field of applications, for example, in the areas of safety and energy saving.