Si/Al order and texture orientation optimization of red-emitting Mg2Al4Si5O18:Eu2+ ceramics for laser phosphor display
Weibin Chen, Yuzhen Wang, Gaochao Liu, Yongsheng Sun, Zhiguo Xia
Abstract
Laser phosphor display technology plays an important role in advanced display projection; however, it is a challenge in maintaining excellent color accuracy under high brightness due to the lack of red spectrum. Here, red-emitting Mg2Al4Si5O18:Eu2+ ceramics as the phosphor wheel have been optimized in chemical compositions and texture orientation. The textured Mg2Al4Si5O18:Eu2+ ceramics have high transparency and spot limiting ability, accordingly, the ceramic wheel outputs 1184 l m of ultra-bright red light under 50W·mm−2 laser power density. Moreover, the red spectral utilization (＞600 nm) of textured Mg2Al4Si5O18:Eu2+ ceramics is 2.17 times that of traditional Y3Al5O12:Ce3+ phosphor wheel. The red-emitting textured Mg2Al4Si5O18:Eu2+ cordierite ceramic herein enables an improved light-color saturation experience, and it is potential in the next-generation laser phosphor display applications.