Fluorescence properties in the visible of highly Pr3+ doped YAG planar waveguides

Synthesis and spectral property of Pr3+-doped tungstate deep red phosphors

“…In these crystals, Pr 3+ ions can be excited by blue light through the transitions from ground state to the 3 P J (J = 0, 1, 2) and 1 I 6 multiplets. Then the 3 P 0 → 3 F 2 transition provides remarkable deep red emission around 650 nm, which is hardly observed in other Pr 3+ -doped materials, such as the titanate, orthovanadate, niobate, and YAG [7][8][9][10][11][12][13][14]. This phenomenon has been discussed partly in Refs.…”

Up-conversion and fluorescence quenching processes studies in highly Pr3+-doped YAG waveguides

“…The behavior of these emissions was discussed in more detail elsewhere [11], hence the spectra are not presented in this work. Also relatively weak, upconverted UV broadband emission, ranging from 300 to 450 nm, which is typical for inter-configurational transitions from 4f5d bands, was observed in all samples.…”

“…At the fundaments of the presented model is the assumption that nonexponential behavior of 3 P 0 and 1 D 2 fluorescence dynamics may be related rather to up-conversion energy transfer (ET) processes starting from these levels than to donor-acceptor interaction between ions lying at different distances, which was assumed in our earlier work [11].…”

“…3 and 4 for three highly doped samples. Cross-relaxation and energy transfer rates were carefully tuned within the range reported in [4,5,11] to obtain satisfactory fit simultaneously for 3 P 0 and 1 D 2 dynamics wave- forms. It can be seen that numerically obtained curves (solid lines) reflect the measured dynamics profiles (square symbols) in an acceptable manner, which confirms correctness of the model.…”

Mn-ion-enhanced red spectral emission from yttrium aluminum garnet doped cerium phosphor

“…In contrast to single Ce doped YAG phosphor, which can convert blue light to yellowish-green light [2], some co-doped YAG:Ce phosphors have been studied that increase the emission efficiency and broaden luminosity spectra. The materials use rare earth elements, such as Pr 3+ , Sm 3+ , or Tb 3+ ions [6][7][8][9]. However, few studies examine YAG:Ce phosphors co-doped with transition elements.…”