Synthesis, energy transfer, charge compensation and luminescence properties of CaZrO3:Eu3+, Bi3+, Li+ phosphor

Abstract

phosphors are synthesized by high-temperature solid-state reaction method in air. Their luminescence properties are researched, compared, and analyzed. CaZrO 3 :Bi 3+ phosphor under excitation at 310 nm emits deep-blue light with chromaticity coordinate (0.1612, 0.0254). CaZrO 3 :Eu 3+ phosphor under excitation at 310 and 395 nm shows red-emitting with chromaticity coordinate (0.6386, 0.3611). CaZrO 3 :Eu 3+ , Bi 3+ phosphor under excitation at 310 nm exhibits a systematically varied hue from deep-blue to red light by changing Eu 3+ ion concentration, and that with excitation at 395 nm only emits red light with chromaticity coordinate (0.6386, 0.3611). The energy transfer process from Bi 3+ to Eu 3+ ions may be indicated by their spectral properties. The optimal Eu 3+ and Bi 3+ ions concentrations are 5 mol% and 0.9 mol%, respectively. The emission intensity CaZrO 3 :Eu 3+ , Bi 3+ phosphor may be enhanced about 1.6 times due to the co-doping Li + ion as charge compensator role. The luminous mechanism of CaZrO 3 :Eu 3+ , Bi 3+ phosphor is explained by the simplified energy level diagrams of Bi 3+ and Eu 3+ ions.

Tailored Luminescence Output of Bi3+-Doped BaGa2O4 Phosphors with the Assistance of the Introduction of Sr2+ Ions as Secondary Cations

“…Regulation of luminescence performance of corresponding optical materials truly matters for their applications in a broad range of fields, such as highly efficient phosphor-converted white light-emitting diodes (WLEDs), − high-density optical data storage devices, , and optical sensing . The establishment of an energy transfer process, − modulation of the host matrix, development of new, efficient, and stable phosphors, − along with the exploration of WLED structures, , are continuously devoted to achieve improved luminescence performance of corresponding phosphors and advanced lighting and display devices. Moreover, persistent energy transfer, , controlled traps associated with tailoring of the trap density, and tuning of trap depth distributions , enable versatile application of optical storage materials for multicolor anti-counterfeiting, optical information storage, and autofluorescence-free optical imaging technology .…”

Giant Photoluminescence Improvement and Controllable Emission Adjustment in Bi3+-Activated Ca4ZrGe3O12 Phosphors for High-Quality White Light-Emitting Diodes

“…One peak position located in 437 nm is attributed to 1 S 0 – 1 P 1 / 3 P 1 electron transition of Bi 3+ . The other peaks are attributed to 5 D 0 – 7 F j ( j = 0–6) electron transition of Eu 3+ with the maximum value at 610 nm . It is known that the relative intensity between 5 D 0 – 7 F 1 (590 nm) and 5 D 0 – 7 F 2 (610 nm) can judge the symmetry of Eu 3+ emission center.…”

“…The other peaks are attributed to 5 D 0 − 7 F j (j = 0−6) electron transition of Eu 3+ with the maximum value at 610 nm. 54 It is known that the relative intensity between 5 D 0 − 7 F 1 (590 nm) and 5 D 0 − 7 F 2 (610 nm) can judge the symmetry of Eu 3+ emission center. Eu 3+ is located in an environment with low symmetry due to the maximum intensity of Eu 3+ at 610 nm.…”

Tailored efficient energy transfer Tb3+, Eu3+activated/co-activated LiAl(PO3)4phosphor by substitution of alkali metals: the effect of charge compensation

“…The inclusion of Eu 3+ ions at the Ca2 site was indicated by a red shift in the C-T band when the co-dopant level increased. Cao et al 49 disclosed that the solid-state chemical technique was used to create the CaZrO 3 :Eu 3+ , Bi 3+ , and Li + phosphors. The CaZrO 3 :Eu 3+ , Bi 3+ phosphor's clearly luminescent qualities can be improved by 1.6 times by co-doping Li + ions in their fluxing and charge-compensating roles.…”