Preparation, characterization and VUV luminescence property of YPO4:Tb phosphor for a PDP

Abstract

Abstract Green-emitting phosphor YPO 4 :Tb used in a PDP was prepared by two different methods, i.e., conventional solid-state reaction route and solution-based co-precipitation route. Results indicated that in solution-based co-precipitation route, a lower temperature was required, no grinding and milling processes were introduced, and the starting materials were mixed at molecular level, compared with conventional solid-state reaction route. Therefore, the phosphor particles obtained from solution-based co-precipitation route had several advantages in the morphology, such as excellent surface quality, almost spherical shape, narrow size distribution, and homogeneous composition. The excitation spectrum measurement showed that YPO 4 hosts had high energy absorption in VUV range, which makes it possible that YPO 4 :Tb phosphors are used in a PDP. The emission spectrum of YPO 4 :Tb under 147 nm excitation indicated that the phosphor powders obtained from solution-based co-precipitation route had high luminance since they have excellent morphologies and homogeneous composition, compared with those obtained from conventional solid-state reaction route.