Abstract All‐inorganic perovskite CsPbI 3 quantum dots (QDs) offer much better stability for photovoltaic applications. Unfortunately, their cell efficiencies are hindered by the low carrier transport efficiency of QD‐assembled films. In addition, agglomeration‐induced phase change QDs poses another problem material and device degradation. Herein, use µ‐graphene (µGR) to crosslink form µGR/CsPbI film is demonstrated. It found that resultant provides not only an effective channel transport,...

A series of novel red emission Mg3Ga2GeO8 (MGG):Mn4+ phosphors under near-UV (NUV) excitation are synthesized successfully by traditional high-temperature solid-state reaction. The structure is investigated high-resolution transmission electron microscopy, scanning and powder X-ray diffraction (XRD) Rietveld refinement. It has one octahedral site tetrahedral in the crystal structure. According to XRD photoluminescence (PL) property analysis, Mn4+ can occupy an (Mg2+/Ga3+) site. PL properties...

Abstract The second near-infrared (NIR II) response photon up-conversion (UC) materials show great application prospects in the fields of biology and optical communication. However, it is still an enormous challenge to obtain efficient NIR II materials. Herein, we develop a series Er 3+ doped ternary sulfides phosphors with highly UC emissions under 1532 nm irradiation. β-NaYS 2 :Er achieves visible efficiency as high 2.6%, along brightness, spectral stability lights illumination...

Abstract Fe 3+ is a promising dopant for designing near‐infrared (NIR) phosphors due to its broadband emitting, non‐toxic, and inexpensive properties. However, the 4 E ( D) + A 1 G) levels of ions are independent crystal‐field parameter, spectral regulation has become huge challenge. Herein, NIR‐emitting phosphor Ca 2.5 Hf (Ga, Al) 3 O 12 : successfully developed toward long‐wave ultraviolet (LWUV) light‐pumped NIR phosphor‐converted LED (pc‐LED). Significantly, excited transition reverse Ga...

In order to explore a new family of phosphate phosphors, the synthesis and crystal structure novel family, Ca19M2(PO4)14 (M = Mg, Zn, Mn), were investigated. Eu3+ doped Ca19Mg2(PO4)14 red phosphor was also successfully synthesized with objective application in ultraviolet-based light-emitting diodes (LEDs) field emission displays (FEDs). The characteristic photoluminescence properties studied detail by excitation (PLE), (PL) spectra decay times. Ca19Mg2(PO4)14:0.06Eu3+ offers higher...

A series of composites nanocrystalline TiO2 with exposed {001} facets and high quality graphene sheets (GS) were synthesized via a one-step hydrothermal reaction in an ethanol–water solvent. The obtained facets-exposed TiO2/GS photocatalysts characterized by Raman spectroscopy (RS), X-ray photoelectron (XPS), diffraction pattern (XRD), field emission scanning electron microscopy (SEM), transmission (TEM), ultraviolet visible (UV-vis) diffuse reflectance (DRS) Electrical Impedance...

To research and develop potential phosphors for ultraviolet-based white light emitting diodes, a novel red emission phosphate phosphor Ca18Li3Bi1-xEux(PO4)14 was synthesized investigated in the full range of 0 ≤x≤ 1. The phase purity crystal structure solid solution were detail by employing X-ray diffractometer refinement, scanning electron microscopy energy dispersive spectrometry. information confirmed as well doping concentration dependent characteristic photoluminescence properties...

Abstract The burgeoning phosphor‐converted near‐infrared light‐emitting diodes (pc‐NIR LEDs) have important applications in special illumination and spectroscopy analysis. However, the development of efficient NIR‐emitting phosphors with high performance is still a challenge. In this work, chemical unit co‐substitution strategy proposed to realize excitation transition regulation successfully achieve high‐performance NIR luminescence Ca 3‐ y Na Mg 1‐ Sb 2‐ x Al 2+ O 12 : Cr 3+ (0 ≤ 0.05, 0...

Abstract Cr 3+ ‐activated near‐infrared (NIR) emitting phosphors are considered as one of the most potential light‐conversion materials for NIR phosphor converted light‐emitting diodes (NIR pc‐LEDs). However, it is still a challenge single ion to achieve flat ultra‐broadband emission toward multi‐functional spectroscopy applications. Herein, chemical unit co‐substituting strategy utilized regulate crystallographic occupancy ions, and successfully realized with record wavelength 915 nm in...

Abstract Cerium oxide has emerged as a crucial promoter for regulating the electrocatalytic oxygen evolution reaction (OER) performance of other active components; however, mechanism underlying its intrinsic activity remains poorly understood. Herein, novel self‐supported coral‐like Ce 2 W O 9 array is synthesized on carbon cloth using simple ion‐exchange method. The in situ electrochemical surface reconstruction facilitated formation defects, which effectively altered local bonding...

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%...

In this Study, Mg2+ and Ba2+ act to enhance the maximum emission of Sr2.97SiO5:0.03Eu2+ significantly redshift band orange-red region in Sr2.97–x–yMgxBaySiO5:0.03Eu2+. Size mismatch between host doped cations tunes photoluminescence spectra shift systematically. A slight blue when increasing amount occurs Sr2.97–xEu0.03MgxSiO5 lattices, a rapid red is codoped Sr2.57–yEu0.03Mg0.4BaySiO5 lattices. The were tuned from 585 601 nm by changing concentration Ba2+. Accordingly, we propose underlying...

A series of single-component Ce3+, Li+, Mn2+ ions codoped color-tunable CaSr2Al2O6 phosphors were synthesized by a high-temperature solid-state reaction, and the photoluminescence properties as well energy transfer mechanism from Ce3+ to have been investigated in detail. The activated strong absorption range 250–420 nm can give blue emission centered at about 460 nm. When are codoped, CaSr2Al2O6:Ce3+, be tuned red through adjusting doping concentration ions, under irradiation 358 is...

Abstract Technological progress has promoted the development of ultra‐wide near‐infrared (NIR) luminescent materials as a new NIR light source. The emission in Na(Al,Ga) 11 O 17 :xCr 3+ (NAGO:xCr ) phosphors is achieved by constructing unique Cr ‐Cr ion pair confined structure. pairs can be observed at low concentration ions(x = 0.04), increase Ga would promote formation pairs, thereby effectively enhancing energy migration process from high‐energy ions to low‐energy ones. Herein, full width...

In this work, we have successfully synthesized a long-term stable and highly efficient blue-emitting SMAO:Eu 2+ phosphor with double luminescence center, which does not significantly disrupt melatonin production in human-centric WLED lighting.

Europium-doped apatite Ca10(SiO4)3(SO4)3F2 (CSSF) has been successfully synthesized by solid state reaction. The crystal structure of CSSF:0.006Eu2+ is refined the Maud refinement method. Optical properties prepared samples are found to depend on rare-earth metal–oxygen distances and lattice iconicity. excitation spectra CSSF:Eu2+ phosphors centered at 350 nm covered range from 250 450 nm. Under excitation, emission show a blue (centered 420 nm) green 525 band, respectively. Meanwhile,...

A novel Ce(3+) activated Lu3MgAl3SiO12:Ce phosphor was synthesized and found to crystallize in the garnet structure. The crystal structure of has been characterised by X-ray diffraction Rietveld refinement. Both room high temperature photoluminescence spectra are utilized investigate luminescence properties field splitting. quenching these phosphors their quantum efficiency (QE) also studied using both prepared YAG:Ce commercial named P46-y3 as reference. Upon excitation with blue light,...

A novel single phased white light emitting phosphor Sr10[(PO4)5.5(BO4)0.5](BO2):Eu2+, Mn2+, Tb3+ was synthesized by solid-state reaction for the first time. The crystal structure, photoluminescence properties and efficient energy transfer from different Eu2+ sites to Mn2+ in Sr10[(PO4)5.5(BO4)0.5](BO2) is studied detail X-ray diffractometry Rietveld method, luminescence spectra, energy-transfer efficiency lifetimes. Through effective transfer, wavelength-tunable warm can be realized with...

Novel blue and green phosphors obtained from K₂ZrSi₃O₉:Eu²⁺ compound by co-doping Al³⁺ Sc³⁺ for LEDs under NUV excitation.