Growth, spectroscopic properties and up-conversion of Yb, Pr co-doped CaF2 crystals

Near-infrared rechargeable glass-based composites for green persistent luminescence

“…7b). This is in agreement with a recent study in which 1.5 mol% of Yb 2 O 3 was reported to yield the largest upconversion improvement in glass-ceramics containing Yb 3+ , Pr 3+ codoped CaF 2 crystals [37].…”

Highly controllable and reproducible one-step synthesis of β-NaYF4:Er3+@NaYbF4@NaYF4 upconversion nanoparticles for Sb2(S,Se)3 solar cells with enhanced efficiency

“…It should be noted here that the observed broadening of the emission peaks is a consequence of the overlap of the closed sub-energy levels caused by the Stark splitting of the corresponding energy levels, which is common in rare-earth ion-doped upconversion materials. 31,32…”

“…It should be noted here that the observed broadening of the emission peaks is a consequence of the overlap of the closed sub-energy levels caused by the Stark splitting of the corresponding energy levels, which is common in rare-earth ion-doped upconversion materials. 31,32 Fig. 3d plots the double logarithmic curve of the emission intensity versus excitation power for calculating the number of photons involved in the UCL process.…”

Luminescent Materials Based on Aluminates: A Review

“…Yb 3+ –Er 3+ pair is most frequently used, [ 365 ] for the reason that Yb 3+ can absorb radiation from LEDs emitting around 980 nm. Other pairs are Yb 3+ –Tm 3+ , [ 366 ] Yb 3+ –Tb 3+ , [ 367 ] Yb 3+ –Pr 3+ , [ 368 ] and Yb 3+ –Ho 3+ . [ 369 ] Apart from lanthanide pairs, organic and organometallic chromophores also exhibit efficient UC.…”