Ce3+/Mn2+-coactivated Ca2Gd8(SiO4)6O2 (CGS) oxyapatite phosphors have been prepared via high temperature solid state reaction process. The Ce3+ emission at different lattice sites has identified and discussed. energy transfer from to Mn2+ in CGS : Ce3+/Mn2+ validated demonstrated be a resonant type dipole-quadrupole mechanism, the critical distance (RC) calculated by quenching concentration method spectral overlap are 9.4 Å 9.2 Å, respectively. A color-tunable can realized modulation of...

Ce3+ and/or Eu2+ activated Ca8La2(PO4)6O2 (CLPA) oxyapatite blue phosphors have been prepared via a Pechini-type sol–gel process. X-ray diffraction (XRD), photoluminescence (PL) spectra, absolute quantum yield, as well lifetimes were utilized to characterize samples. The emission of and ions at different lattice sites has identified discussed. CLPA:0.04Ce3+ phosphor exhibits bright with higher yield (67%) excellent CIE coordinates (x = 0.160, y 0.115) under UV excitation, the CLPA:0.05Eu2+...

Abstract Fluorescent type nuclear battery consisting of scintillator and photovoltaic device enables semipermanent power source for devices working under harsh circumstances without instant energy supply. In spite the progress structure design, development scintillators is far behind. Here, a Cs 3 Cu 2 I 5 : Mn showing high light yield ~67000 ph MeV −1 at 564 nm presented. Doping intrinsic features endow with robust thermal stability irradiation hardness that 71% or >95% initial...

Ce3+, Mn2+, and Tb3+-activated Mg2Y8(SiO4)6O2 (MYS) oxyapatite phosphors have been prepared via solid state reaction process. The Ce3+ emission at different lattice sites in MYS host has identified discussed. Under UV excitation, there exist dual energy transfers (ET), that is, → Mn2+ Tb3+ the MYS: Ce3+/Mn2+/Tb3+ system. transfer from to Ce3+/Mn2+ demonstrated be a resonant type dipole–quadrupole mechanism, critical distance (RC) calculated by quenching concentration method spectral overlap...

A series of Ca(4)Y(6)(SiO(4))(6)O (CYS): Ce(3+)/Mn(2+)/Tb(3+) oxyapatite phosphors were prepared via high-temperature solid-state reaction. Under UV excitation, there exist dual energy transfers (ET), i.e., Ce(3+)→Mn(2+) and Ce(3+)→Tb(3+) in the CYS: Ce(3+), Mn(2+), Tb(3+) system their emitting colors can be adjusted from blue to orange-red ET green Ce(3+)→Tb(3+), respectively. Moreover, a wide-range-tunable white light emission with high quantum yields (13%-30%) obtained by precisely...

Sr(3)AlO(4)F:RE(3+) (RE = Tm/Tb, Eu, Ce) phosphors were prepared by the conventional solid-state reaction. X-ray diffraction (XRD), field-emission scanning electron microscopy (FE-SEM), photoluminescence (PL) spectra, as well lifetimes utilized to characterize samples. Under excitation of UV light, Sr(3)AlO(4)F:Tm(3+), Sr(3)AlO(4)F:Tb(3+), and Sr(3)AlO(4)F:Eu(3+) exhibit characteristic emissions Tm(3+) ((1)D(2)→(3)F(4), blue), Tb(3+) ((5)D(4)→(7)F(5), green), Eu(3+) ((5)D(0)→(7)F(2), red),...

Eu3+ and/or Tb3+-doped CaYAlO4 phosphor samples were synthesized by Pechini-type sol–gel method. X-Ray diffraction (XRD), field-emission scanning electron microscopy (FE-SEM), photoluminescence (PL) and cathodoluminescence (CL) spectra used to characterize the samples. For CaYAlO4:Tb3+, it is shown that Tb3+-doping concentration has a significant effect on 5D3/5D4 emission intensity of Tb3+, which attributed cross relaxation from 5D3 5D4. Under 4f8 → 4f75d excitation Tb3+ or low-voltage...

Eu2+-, Mn2+-activated Ca9Mg(PO4)6F2 (CMPF) phosphors with blue to yellow color-tunable emission properties have been synthesized via high-temperature solid-state reaction method. The crystal structure of has identified by Rietveld refinement. different crystallographic sites Eu2+ in CMPF:Eu2+ confirmed virtue their fluorescence decay lifetimes. Eu2+-activated CMPF exhibit broad excitation spectra from 200 420 nm (which matches well the UV-based LED chips) and 380 580 centered at 454 nm....

The influence of Mg(2+)-Si(4+)/Ge(4+) incorporation into Ce(3+)-doped Y3Al5O12 garnet phosphors on the crystal structure and luminescence properties is described in this work. X-ray diffraction with Rietveld refinements, photoluminescence spectra, absolute quantum yield, thermal quenching behavior, lifetimes were utilized to characterize samples. introduction leads an obvious red shift emission wavelength under excitation blue light, especially for series Mg(2+)-Si(4+) substitutions, which...

Sr3In(PO4)3 (SIP):Ce3+/Tb3+/Mn2+ phosphors have been prepared via a solid state reaction process. Under UV excitation, there are three energy transfer (ET) pairs in the SIP host, i.e., Ce3+ → Tb3+, Mn2+, and Tb3+ Mn2+. Both of ETs from to Mn2+ host demonstrated be resonant type dipole–quadrupole mechanism, critical distance (RC) calculated by quenching concentration method spectral overlap method, respectively, were investigated. By ET emitting colors studied samples could adjusted blue...

A series of LaOF:Ln3+ (Ln = Eu, Tb, Sm, Dy, Tm, and/or Ho) nanocrystals with good dispersion have been successfully prepared by the hydrothermal method followed a heat-treatment process. Under ultraviolet radiation and low-voltage electron beam excitation, show characteristic f-f emissions Ln3+ or give red, blue-green, orange, yellow, blue, green emission, respectively. Moreover, there exists simultaneous luminescence Tb3+, Eu3+, Sm3+, Dy3+, Tm3+, Ho3+ individually when codoping them in...

Ce(3+)-, Tb(3+)-, and Mn(2+)-activated Ca(3)Gd(7)(PO(4))(SiO(4))(5)O(2) (CGPS) silicate-phosphate oxyapatite phosphors have been prepared via conventional solid-state reaction processes. The Ce(3+) emission at different lattice sites has identified discussed. dual energy transfer of → Tb(3+) Mn(2+) investigated. from to in CGPS demonstrated be a resonant type dipole-quadrupole mechanism, the critical distances (R(C)) for calculated by concentration quenching spectral overlap methods are 9.71...

Eu3+ and/or Tb3+-doped CaGdAlO4 phosphor samples were synthesized via a conventional high temperature solid-state reaction process. X-Ray diffraction (XRD), transmission electron microscopy (TEM), photoluminescence (PL) as well cathodoluminescence (CL) spectra used to characterize the samples. For CaGdAlO4:Tb3+, concentration of doped Tb3+ has significant effect on 5D3/5D4 emission intensity due dipole–dipole cross-relaxation mechanism from 5D3 5D4. Under 4f8 → 4f75d excitation or...

Pure Ca2Ba3(PO4)3Cl and rare earth ion (Eu2+/Ce3+/Dy3+/Tb3+) doped phosphors with the apatite structure have been prepared via a Pechini-type sol–gel process. X-ray diffraction (XRD) refinement, photoluminescence (PL) spectra, cathodoluminescence (CL) absolute quantum yield, as well lifetimes were utilized to characterize samples. Under UV light excitation, undoped sample shows broad band centered near 480 nm after being reduced due defect structure. Eu2+ Ce3+ samples also show 5d → 4f...

ZnGa 2 O 4 and : Mn 2+ /Eu 3+ with uniform nanosphere (diameter about 400 nm) morphology have been synthesized via a facile hydrothermal approach. XRD, Raman spectra, XPS, FT‐IR, SEM, TEM, photoluminescence (PL), cathodoluminescecne (CL) spectra are used to characterize the resulting samples. The controlled experiments indicate dosage of trisodium citrate pH values responsible for shape determination products. possible fast crystallization–dissolution–recrystallization formation mechanism...

A series of single-composition phosphors Ca5(PO4)2SiO4:Ce3+, Tb3+, Mn2+ have been prepared via a high-temperature solid-state reaction process. The Ce3+ emission at different lattice sites has identified and discussed. energy transfer from to Tb3+ ions validated. emissive colors Tb3+/Mn2+ samples can be adjusted blue green red-orange by the → Mn2+, respectively. More importantly, white obtained through adjusting relative concentrations Ce3+, in Ca5(PO4)2SiO4 host under UV low-voltage...

A series of single-phase phosphors based on KNaCa2(PO4)2 (KNCP):A (A = Ce(3+), Eu(2+), Tb(3+), Mn(2+), Sm(3+)) have been prepared via the Pechini-type sol-gel method. Photoluminescence (PL) and cathodoluminescence (CL) properties Ce(3+)-, Eu(2+)-, Tb(3+)-, Mn(2+)-, Sm(3+)-activated KNCP were investigated. For singly doped samples, they exhibit characteristic emissions activator. Na(+) ions best charge compensation result among Li(+), Na(+), K(+) for Sm(3+)-doped samples. The energy transfers...

A series of Ca8Gd2(PO4)6O2, (CGPO):A (A = Ce3+, Eu2+, Tb3+, Dy3+, Mn2+, and their combination), phosphors with the oxyapatite structure have been prepared via a Pechini-type sol–gel process. X-ray diffraction (XRD), photoluminescence (PL) spectra, cathodoluminescence (CL) absolute quantum yield lifetimes were utilized to characterize samples. Under UV low voltage electron beam excitation, Ce3+ ion, as sensitizer, can transfer its energy other activators (Eu2+, Mn2+) in CGPO:Ce3+,...

Tb(3+), Tm(3+), and Dy(3+)-activated SrY2O4 phosphors have been prepared via Pechini-type sol-gel method. X-Ray diffraction (XRD), field-emission scanning electron microscopy (FE-SEM), transmission (TEM), photoluminescence (PL) lifetimes, as well cathodoluminescence (CL) spectra were used to characterize the samples. Under low-voltage beam excitation, Tb(3+)-doped samples show a green luminescence, with better CIE coordinates higher emission intensity than commercial product ZnO: Zn. Blue...

A series of β-Na2Ca4(PO4)2(SiO4) (β-NCPS):A (A = Eu(2+), Dy(3+), Ce(3+)/Tb(3+)) phosphors were prepared via a high-temperature solid-state reaction route. The X-ray diffraction, Fourier transform infrared, photoluminescence (PL), cathodoluminescence (CL) properties, fluorescent lifetimes, and absolute quantum yield exploited to characterize the samples. Under UV radiation, β-NCPS:Eu(2+) present bright green emissions, β-NCPS:Ce(3+) show strong blue which are attributed their 4f(6)5d(1) →...

YOF:Ln3+ (Ln = Tb, Eu, Tm, Dy, Ho, Sm) nano-/microstructures with a variety of novel and well-defined morphologies, including nanospheres, nanorod bundles, microspindles, have been prepared through convenient modified urea-based homogeneous precipitation (UBHP) technique followed by heat treatment. The sizes morphologies the YOF products could be easily modulated changing pH values fluoride sources. XRD, TG-DTA, FT-IR, SEM, TEM, as well photoluminescence (PL) cathodoluminescence (CL)...

Hollow and porous structured GdVO4:Dy3+ spheres were fabricated via a facile self-sacrificing templated method. The large cavity allows them to be used as potential hosts for therapeutic drugs, the feature of shell guest molecules easily pass through void space surrounding environment. samples show strong yellow-green emission Dy3+ (485 nm, 4F9/2 → 6H15/2; 575 6H13/2) under UV excitation. intensity was weakened after encapsulation anticancer drug (doxorubicin hydrochloride, DOX) gradually...

Uniform LaOF and : Eu(3+) nanocrystals of the γ-form have been successfully synthesized under mild conditions via a facile hydrothermal method followed heat treatment their bastnaesite-type precursor (LaCO(3)F). The synthetic details, investigations into phase purity presence oxocarbonate anion CO(3)(2-) proven by IR measurements EDX, as well X-ray powder diffraction data, are given. Photoluminescence (PL) cathodoluminescence (CL) spectra were utilized to characterize luminescence properties...