Site-selective occupation of Eu2+ activators toward full-visible-spectrum emission in well-designed borophosphate phosphors

Single Bi3+ Ultrabroadband White Luminescence in Double Perovskite via Crystal Lattice Engineering toward Light‐Emitting Diode Applications

“…[ 44 ] Figure 7c,d depicts three heating–cooling cycle tests carried out at 300 to 480 K. It is noteworthy that when cooled to room temperature, the PL intensity shows almost no decrease compared to the beginning, with good thermal recovery performance, which has potential applications in LED devices. In order to better understand the heat quenching process, the activation energy (Δ E ) was calculated using the Arrhenius formula [ 45 ] …”

Controllable crystal form transformation and luminescence properties of up-conversion luminescent material K3Sc0.5Lu0.5F6: Er3+, Yb3+ with cryolite structure

“…43,44 Based on the site occupation fraction in Rietveld renement, the Er 3+ ions sites, the Er2 3+ ions take up $3.6% Sc2/Lu2 sites and Yb2 3+ ions take up $20.3% Sc2/Lu2 sites. 45,46 Fig. 5(a) shows the SEM image of monoclinic KSLF: 0.04Er 3+ , 0.2Yb 3+ , the prepared sample is irregularly granular, with a particle size of about tens of microns.…”

“…In cubic KSLF, the Er1 3+ ions take up ∼2.7% Sc1/Lu1 sites and Yb1 3+ ions take up ∼20.2% Sc1/Lu1 sites, the Er2 3+ ions take up ∼3.6% Sc2/Lu2 sites and Yb2 3+ ions take up ∼20.3% Sc2/Lu2 sites. 45,46 …”

Tuning crystal structure and luminescence of Eu2+-activated LiSr1–xBaxPO4 solid solution for white light-emitting diodes

“…Therefore, a large number of Eu 2+ -or Ce 3+ -activated phosphors with tunable emission color have been reported on the basis of different crystal structures. [7][8][9][10][11][12][13][14][15][16][17] The modification of crystal structures through solid solution is an efficient way to adjust the luminescent properties of Eu 2+ -or Ce 3+ -activated phosphors, which contains cationic replacement, (partial) anionic replacement, both cationic and anion group replacement, and etc. 6 These types of modification usually result in continuous shift of the emission band, due to continuous variation of coordination polyhedron.…”