Effect of optical basicity on Er3+ up-conversion luminescence in GeO2–R2O glasses

Electron Energy Loss Spectroscopy Analysis on the Preferential Incorporation of Er3+ Ions into Fluoride Nanocrystals in Oxyfluoride Glass‐Ceramics

“…They were almost identical indicating that Er 3+ ions in the glass‐ceramics have fluorine environment similar to that in PbF 2 crystals. On the other hand, the same spectrum recorded from oxide glass was completely different . In addition to the lifetimes and absorption spectra measurements, several other spectroscopic methods were also used to investigate the local environment of rare‐earth ions.…”

SrY2S4 – a novel host lattice for up-conversion luminescence and high-sensitive optical thermometry

“…Additionally, the green-emitting states of 2 H 11/2 and 4 S 3/2 are populated through non-radiative relaxation from the 4 F 7/2 state. 25 Subsequently, green emissions occur through the transitions of 2 H 11/2 / 4 S 3/2 → 4 I 15/2. Regarding the red emission, there is a non-radiative relaxation process from the 4 I 11/2 to 4 I 13/2 level, followed by the population of 4 F 9/2 state after absorbing the second 980 nm photon.…”

Transient submicron temperature imaging based on the fluorescence emission in an Er/Yb co-doped glass–ceramic

“…3a and b), like the other compositionally similar materials [34,35]. The relative intensities of the two associated emission peaks directly depend on the occupancies of the two excited electron energy levels in thermal equilibrium, following the Boltzmann relation:…”