Research on optical performance of LnOS:Er/Yb (Ln = La/Gd/Y) phosphors based on different phonon energies.

It is crucial to explore the intrinsic mechanisms that influence thermometric sensitivity. This study investigates the optical performance of materials with the same crystal structure but different phonon energies. LnOS:Er/Yb (Ln = La/Gd/Y) phosphors with similar morphology and particle sizes were prepared to systematically study the influence of different phonon energy matrices on optical properties.