Tunable Upconversion Luminescence and Optical Thermometry in (Yb,Er)2SiO5/SiO2 Composite Phosphors
Upconversion luminescent materials have broad application prospects in lighting, display, and laser technology. However, single‐phase systems are constrained by performance bottlenecks, making it difficult to simultaneously achieve high temperature sensitivity and tunable luminescence. To address this challenge, (YbxEr...