A novel blue-emitting phosphor Na₃Sc₂(PO₄)₃:Eu²⁺was successfully synthesized by solid-state reaction.

A series of Ca2YZr2Al3O12:Eu3+ (CYZA) phosphors were successfully synthesized through conventional solid-state method. The electronic structure and their photoluminescence or cathodoluminescence properties investigated in detail. Under n-UV excitation, the CYZA:Eu3+ exhibits more intense red emission than commercial Y2O3:Eu3+ phosphor. WLED lamp with good color render index was obtained by fabricating phosphor BAM:Eu2+ LuAG:Ce3+ phosphors. also high current saturation resistance under low...

This review investigates the thermal behaviors of phosphors and summarizes with excellent stabilities.

Y₃Al₅O₁₂:0.06Ce³⁺, xMn²⁺ (YAG:0.06Ce,xMn) phosphors have been synthesized and the effect of different charge compensators on color adjustment has investigated for first time. The luminescence properties Mn2+ singly doped co-doped with Ce3+ into YAG host discussed. It is observed that in sample, ions not only occupy two kinds Al3+ sites to generate a yellow deep red emission bands, but also Y3+ obtain green band host. Considering substitution Al3+, quadrivalence including Zr4+, Ge4+ Si4+ are...

A novel red-emitting oxonitridosilicate phosphors, Sr2SiNzO4−1.5z:Eu2+ (0.7 < z 1.2), was prepared by solid state reaction in NH3–N2 atmosphere. The crystal structure determined Rietveld analysis on powder X-ray data. Sr2SiNzO4−1.5z 1.2) crystallizes an orthorhombic with the space group of Pmnb: ba−c (no. 62), and cell parameter a = 5.67366(5) Å, b 7.09777(4) c 9.75112(1) Å. exhibited broad-band red emission centred at ∼620 nm (FWHM ≈ 95 nm) under blue light irradiation high QE value 78.0%...

A novel garnet phosphor, Ca₂LuHf₂(AlO₄)₃:Ce³⁺(CLHA:Ce³⁺), was successfully designed and synthesized using a solid-state method.

A series of SrSiAl2O3N2:Eu(2+) (0.005 ≤x≤ 0.05) phosphors were successfully synthesized through a pressureless, facile, and efficient solid state route. The crystal structure, band their photoluminescence cathodoluminescence properties investigated in detail. exhibit rod shape morphology with uniform Eu(2+) distribution. Under n-UV excitation the emission spectra shift from 477 to 497 nm an increase concentration. concentration quenching mechanism was dominated by dipole-dipole interaction....

An excellent persistent luminescence (PersL) phosphor NaCa2GeO4F:Mn2+,Yb3+ has been synthesized by traditional solid-state reaction. By controlling the occupation sites of Mn2+ emitters, PersL color this can be optionally tuned in red to green-yellow region, and maximum spectral shift is more than 50 nm. Significantly, measured for approximately 13 3 h (0.32 mcd/m2) observed 20 5 with dark-adapted vision after exposure ultraviolet irradiation artificial sunlight, respectively. The...

Large quantities of hexagonal boron nitride ( h‐BN ) nanoplates with morphologies have been successfully synthesized by a simple two‐step route without using any template or catalyst, including combustion synthesis and then annealing processes. The phase content, morphology, optical properties the products characterized. It reveals that obtained are pure high crystallinity. UV –vis absorption spectrum indicates an band gap ~6.07 eV. Strong violet–blue photoluminescence PL emission broad...

A series of quaternary nitride solid solutions with a general formula Sr1−xCaxYSi4N7:Eu2+ (1 atom%) were synthesized by the carbothermal reduction and nitridation (CRN) method. The XRD patterns confirm formation solution (0 ≤ x 0.5). With an increase in x, emission spectra shift from 540 nm to 564 under n-UV excitation. In addition, temperature dependence PL intensity was investigated. thermal stability is comparable that commercial (Ba,Sr)2SiO4:Eu2+ phosphor. All results indicate can be...

We studied the crystal structure of Y₄Si₂O₇N₂ and relationship between luminescence properties.

The fairness of long-term self-renewal and robust cell proliferation limits the applications human mesenchymal stem cells (hMSCs) in regenerative medicine. Inducing hMSCs from human-induced pluripotent (hiPSCs), which have advantages autogenous no number issues, is highly valuable. However, current induction methods using FBS-containing culture medium problems, including immunogenicity, microbial contamination, low efficiency. To solve these we propose a chemically defined protocol...

Aluminum oxynitride (AlON) was commonly used in functional ceramic materials, including phosphors for white light-emitting diodes (LEDs). In the current work, a new polymorph of AlON structure, single phase [Mg1.25Si1.25Al2.5]O3N3, has been devised and synthesized through solid-state reaction at rather low temperature 1550 °C. Its structure calculated by Rietveld refinement. The [Mg1.25Si1.25Al2.5]O3N3 crystallizes trigonal with lattice parameters = b 3.0312 Å, c 41.5758 V 330.83 Å3,...

A series of nitride solid solutions (Ca1–xSrx)16Si17N34:0.03Eu2+ were successfully synthesized through the conventional solid-state method. The electronic crystal structure and photoluminescence characteristics studied in detail. excitation near-ultraviolet blue regions samples shows a broad band 250–550 nm range, which can match well with n-UV lighting-emitting diode chips. Partial substitution Ca2+ by Sr2+ results redshift emission, impacts Sr content on luminescence researched Under 410...

Abstract Red phosphor is indispensable to achieve warm white light in the diode (WLED) application. However, current red phosphors suffer from high cost and harsh synthesis conditions. In this study, an oxide‐based rare‐earth‐free red‐emitting Li 3 Mg 2 NbO 6 :Mn 4+ (LMN:Mn ) has been successfully synthesized by a simple solid‐state reaction method. The relationship between crystal structure luminescence was investigated detail. site occupancy of doping Mn ion LMN host discussed point bond...

A green-emitting nitride phosphor Ca1.4Al2.8Si9.2N16:Ce3+, Li+ (CASN:Ce) has been successfully synthesized which is applicable to near-ultraviolet based light-emitting diodes (LEDs) and field emission displays (FEDs). The characteristic photoluminescence (PL) properties were studied in detail by PL excitation, spectra time-resolved spectroscopy. CASN:0.10Ce exhibits broad-band green centered at ∼525 nm (FWHM ≈ 135 nm) under 395 excitation with excellent thermal stability. effect of host...

A series of BaSr2Sc4O9 and Ce3+-doped phosphors were synthesized via the high temperature solid state reaction. Crystal structure information on is first refined using Rietveld method based XRD data, it assigned to trigonal system with R3 space-group. The photoluminescence properties investigated in detail, including emission excitation spectra, site occupation, decay lifetime, thermal quenching, quantum efficiency. There are three Ba2+/Sr2+ sites four Sc3+ this structure. Ce3+ ions 6-fold...

Abstract A novel apatite‐based UV‐excited dual‐emitting Ca 2 Na La 6 (SiO 4 ) (PO O: Eu 2+ /Eu 3+ phosphor (CNL: was designed and successfully synthesized by a solid‐state reaction. Compared with previous reports on this family of materials, structural study based DFT calculation exhibited new consequence that the monovalent ions in system are more inclined to occupy seven‐coordinate cationic sites rather than nine‐coordinate sites. This result confirmed refinement high‐resolution...

The promising green oxynitride phosphor, Ba3−xCaxSi6O12N2:Eu2+, was synthesized at 1350 °C for 5 hours under a reducing N2/H2 (5%) atmosphere via the solid-state reaction method. XRD patterns confirm formation of pure phase Ba3−xCaxSi6O12N2:Eu2+. With an increase in x, emission spectra shift from 525 nm to 536 near-UV (n-UV) excitation. Accordingly, we propose underlying mechanisms red-shift by adjusting cation composition host. influence size mismatch on thermal quenching is also observed....

The promising green oxynitride phosphor, Ba3-xMgxSi6O12N2:Eu(2+) was synthesized by the solid-state reaction method. effect of Mg(2+) doping on structure and photoluminescence (PL) properties Ba3Si6O12N2:Eu(2+) investigated systematically. results reveal that phosphor retains single phase Ba3Si6O12N2, with lattice expanding upon increasing concentration, in an appropriate range. This suggests a large portion enters into interstitial sites crystal lattice. At certain can greatly enhance...

We exhibit a vivid example of turning waste into treasure for the development persistent luminescence (PersL) phosphor.

Eu2+ doped and Eu2+, Ce3+ co-doped LiSi2N3 phosphors were successfully prepared by gas-pressed sintering in this study. The dominant excitation band of LiSi2N3:Eu2+ was found at about 355 nm exhibited a broad-band yellow emission centered 592 instead the early reports 310 580 nm, respectively. shifting behavior dominantly contributed to different oxygen content host. second luminescent center formed introduction into nitride discussed detail. detailed energy transfer mechanism from host is...