Upconversion luminescence of Yb3+/Tb3+/Er3+-doped fluorosilicate glass ceramics containing SrF2 nanocrystals

Preparation and up-conversion luminescence properties of Er³⁺–Yb³⁺ co-doped CaO–WO₃–SiO₂–B₂O₃–NaF glass ceramics

“…6, two spectra bands appeared under light excitation at 980 nm, which correspond to green light spectra at 517557 nm and red light spectra at 648 670 nm, respectively. Two strong green light bands at 525 and 545 nm correspond to 2 Journal of the Ceramic Society of Japan 124 [3] 20) With the increase of heat treatment time, the intensity of emission peaks increased and then decreased. The glass ceramics which were heated at 750°C for 70 min had homogeneous crystal distribution and highest fluorescence intensity.…”

Spectroscopic and upconversion properties of Er3+/Yb3+-codoped KLTN single crystal

“…Pump dependence of green and red UC fluorescence in KLTN crystal are investigated. For an unsaturated UC process, it is well known that the number of photons that are required to populate the upper emission state can be obtained by the following relation [9]:…”

“…In these materials, Er 3+ has been considered as an ideal blue, green, and red luminescence center due to its unique level structure. On the other hand, Yb 3+ is widely used as the most effective sensitizing ion due to its large absorption cross section around 980 nm and effective energy transfer to luminescence center [9]. Meanwhile, Yb 3+ is also used as an energy transfer bridging ion among multiple rare earth (RE) ions codoped system to optimize the UC emissions [10].…”

Thermal, mechanical, and upconversion properties of Er3+/Yb3+ co-doped titanate glass prepared by levitation method

“…Among the glassy materials, halide (fluoride, etc.) glasses are notable due to their lower phonon energy, which can reduce the nonradiative loss caused by multiphonon relaxation and thus realize strong upconversion luminescence [5][6][7].…”