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2022
ACL
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S.Feng, Y.Guo, M.Allix*, S.Li, R.J.Xie, J.Fu, C.Genevois, E.Véron, H.Wang, Y.Yang, H.Qin*, J.Li*, 'Biphasic Lu3MgAl3SiO12-based transparent ceramics for uniform laser-diode-driven white lighting', Cell Reports Physical Science 3 101044 (2022) doi:10.1016/j.xcrp.2022.101044
Lu3Al5O12:Ce3+ is a promising color converter for laser diode (LD)-
driven solid-state lighting due to the improved thermal stability of its
luminescence compared with widely used Y3Al5O12:Ce3+ materials.
However, LuAG:Ce3+ emits green light, which is a severe drawback
for white lighting. Here, we report biphasic Lu3MgAl3SiO12:Ce3+ (BPLMAS:
Ce3+) transparent ceramics designed with a multiple-component
strategy that exhibit red-shifted emission via the inclusion of a secondary
phase (Lu/Mg)4(Al/Si)2O9. This phase, dispersed homogeneously in
the BP-LMAS:Ce3+ matrix, provides scattering centers, which improve
the uniformity of the emitted light. The material demonstrates a broad
orange-yellow emission centered at 564 nm (450-nm excitation), with
an internal quantum efficiency of 76.1% and transmittance of 76%
and enhanced thermal stability. Under the excitation of 14.5 W
mm2 blue LDs, it generates white light with a high luminous flux of
5,655 lumen (lm). This demonstrates that BP-LMAS:Ce3+ transparent
ceramics are promising candidates as color converters for LD-driven
white lighting applications.
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