A multifunctional fluorescent polyurethane (MFP) with solid-state and acid-base responsive fluorescence emission was reported by bonding 1,5-dihydroxy naphthalene(1,5-DN) into polyurethane backbone. The structure of MFP was confirmed by characterization with 1H NMR, FTIR and UV spectra. The fluorescent emission property and acid-base response behavior of MFP samples were studied on fluorescence spectrophotometer

Lanthanides doped optical materials with temperature sensing property are of great interest for optical thermometry. However, most lanthanides doped luminescent materials for ratiometric thermometer are often accompanied by thermal quenching, which leads to a decrease in temperature sensing performance. Here, Nd3+ doped Yb2Mo3O12 phosphor with near-infrared upconversion emissions has been fabricated

Twisted intramolecular charge transfer (TICT) and excited state intramolecular proton transfer (ESIPT) are of fundamental importance during the excited state dynamics of dyes and fluorescent sensors. Co-existence of the two processes usually complicates the whole photophysical process of dyes and leave the fluorescence detection mechanism of sensors uncovered. In this contribution, competition between

In this work, we synthesized the phosphate glass pure and doped with erbium ions (Er3+) and investigated the effect of the controlled atmosphere and fluoride incorporation on the optical properties of Er3+ ions using the Judd-Ofelt theory. The PAN and PANK glass matrices with nominal compositions 60P205 - 10Al2O3 - 30Na2O (mol%) and 40P2O5 - 20Al2O3 - 35Na2O - 5K2O (mol%), pure and doped with Er2O3

The optical properties of the efficient near-infrared long-persistence phosphors Zn2SnO4: 0.2% Cr3+ spinels were investigated by Yang Li et al. (2015) [1]. These spinels are effective materials to fabricate multi-wavelength, low-cost, NIR phosphorescent phosphors with many potential multifunctional bio-imaging applications. The process of persistent phosphorescence occurs through a delicate interplay

Tm3+, Yb3+: CdF2 single crystals with good optical quality are grown by the standard Bridgman method. The crystal structure is checked by means of X-ray diffraction analysis. Under 800 nm excitation of Tm3+ ions, the samples show an intense infrared band around 1800 nm associated with the 3F4→3H6 transition. The sample exhibit also upconverted luminescence under 975 nm laser excitation which is a signature

The novel Ho,Pr:CaGdAlO4 crystal was grown successfully by the Czochralski method. The crystal structure, segregation, absorption and luminescence properties were investigated in detail. The concentration of Pr3+ and Ho3+ ions are 0.76 × 1020 cm−3 and 3.49 × 1020 cm−3, respectively. The effect of Pr3+ co-doping on the ~2.86 μm emission of Ho3+ was analyzed. The fluorescence intensity of Ho,Pr:CaGdAlO4

This work demonstrates the luminescence of Mn4+ activated cubic spinel Li4Ti5O12 (LTO) powders. One-step solid-state method was used to obtain eleven samples with different quantities of Mn4+. The deep red emission centered at around 696 nm originates from 2Eg → 4A2g spin forbidden electronic transitions from 3 d3 electron configuration of Mn4+ ion. The concentration quenching of emission is also observed

A series of LuAG: 5 mol%Yb3+/x mol%Tm3+ (x = 0.1, 0.3, 0.5, 1, 2) poly-crystals have been prepared through floating zone method with CO2 laser. The up-conversion luminescence spectra of the samples were recorded under 980 nm excitation. The results tell us that the optimal concentration of Tm3+ ions is around 0.3 mol%. Moreover, the optical temperature sensing properties of the LuAG: 5 mol%Yb3+/0.3

Luminescent ions doped lead free ferroelectric ceramics are the potential candidates to the widespread application of optoelectronic devices due to the coupling between their unique photoluminescence and inherent ferroelectric performance. In this work, the tunable photoluminescence response is successfully achieved in (1-x)Na0·5Bi0·5TiO3-xCaTiO3: Eu3+ (NBT-xCT: Eu3+, x=0.07, 0.1) via electric field

Lanthanide complex-based medicine combining organic ligands and individual lanthanide ions is proving successful in therapeutics, especially in drug delivery, chemotherapy, and photodynamic therapy. In this review, I discuss the coordination chemistry, antenna effect, and chelating ligands of lanthanide complexes and their key features benefiting the therapeutical monitoring and performance, such as

Hydrogen peroxide (H2O2), as a typical reactive oxygen species (ROS), has attracted increasing interest in biochemical field since its homeostasis has recognized implications with diverse health and diseases consequences. The detection of H2O2 is crucial to accurately understand its roles in the physiological and pathological process. Here, we develop a fluorescent probe BOD-H2O2 with its excitation

The output characteristics of orange-yellow-green emission switchable output generated in a compact passively Q-switched YVO4 Raman laser were investigated for the first time. A Cr4+:YAG/YAG composite crystal was adopted as the saturable absorber to realize passively Q-switch operation. The diode-end-pumped Nd:YAP laser operating at 1.08 μm was used to drive an a-cut YVO4 crystal for realizing the

It was shown, that Cu-doped hexagonal phases YGaO3, YInO3 and GdInO3 possess an intense broadband photoluminescence in the near infrared region. This photoluminescence is attributed to the unique crystalline lattice of studied hexagonal phases with trigonal-bipyramidal coordinated Ga3+ and In3+ ions. It was suggested that an emissive center in these phases is formed by heterovalent substitution of

A new type of long persistent green luminescent phosphor Ca2Ga2GeO7: Tb3+ was prepared by high temperature solid-state reaction technique. In this paper, the crystal structure, luminescence properties and decay curves of phosphors were mainly studied. The long persistent luminescence (LPL) properties of these phosphors were characterized by LPL spectra, LPL decay curves and thermoluminescence (TL)

Photoluminescence (PL) and radioluminescence (RL) measurements were made on both nanoparticle and bulk NaMgF3:Ce,Sm, before, during, and after X-ray irradiation. The relative concentrations of Sm3+ and Sm2+ were markedly different for the nanoparticle and bulk samples. Sm3+ dominated the PL in NaMgF3:Ce,Sm nanoparticles while the bulk sample showed Sm3+ and Sm2+ PL. Ce3+ PL and Ce3+ sensitisation of

LiMgPO4(LMP):Tm, LMP:Tb and LMP:Tm, Tb phosphors were synthesized via a high-temperature solid-phase method, and the crystal structures of the samples were studied by X-ray diffraction (XRD). Thermoluminescence (TL) and optically stimulated luminescence (OSL) curves and TL three-dimensional (3D) spectra of the LMP phosphors doped with Tm3+ and Tb3+ were measured. The photoluminescence (PL) of the samples

A novel red phosphor NaRbSnF6:Mn4+ (NRSF:Mn) with narrow band red-emitting peaks and broad absorption band in blue region has been synthesized by an ion-exchange method at room temperature, and the formation mechanism has been investigated by varying the molecular rations of starting materials. The morphology and luminescence properties of NRSF:Mn are strongly dependent on the solvents utilized in

Two Ge1-xSnx/Si0.1Ge0.85Sn0.05 (x = 7.3% and 8.5%) multi-quantum wells (MQWs) based light emitting diodes (LEDs) were designed and fabricated to achieve efficient light emission in the ∼2 μm wavelength band. Electroluminescence (EL) at wavelengths of 1980 nm (0.626 eV) and 2060 nm (0.602 eV) from the MQWs light emitting diodes were observed at room temperature. Super-linear dependence between the injected

In this review manuscript we will gather experimental evidences of the remote coherence between two polariton condensate droplets that have never overlapped in real space, examining their interference in reciprocal space. Additionally, we discuss how these interferences can be used to estimate the critical temperature for the Bose-Einstein condensate-like transition.

Graphitic carbon nitride (g-C3N4) modified with electron rich P ions was synthesized by directly heating a mixture of melamine and diammonium hydrogenphosphate with various doping concentration. The effect of the doping ion and its concentration on the morphology, structural and optical properties of the samples were investigated in detail. With the doping concentration increasing, a relative red shift

Undoped and Ce-doped hexagonal BiPO4 were synthesized by a precipitation method and characterized on their structure, Ce spatial distribution and chemical state, together with detailed luminescence spectroscopy investigation through systematic variation of the excitation wavelength (λexc) over the broad range 250–460 nm combined with radioluminescence measurements and extensive literature review. Up

Terbium doped magnesium orthosilicate (Mg2SiO4: Tb) has been reported as the most efficient thermoluminescence dosimeter material. Further sensitivity improvements of Mg2SiO4: Tb may be achieved by co-doping with other metal ions. Performance is strongly influenced by the sintering conditions, as shown here for Mg2SiO4: Tb samples which were synthesized with microwave thermal processing. A series of

Zinc gallate (ZnGa2O4) phosphor was fabricated by the direct precipitation method (DPM) and solid state reaction method (SSRM). The physicochemical and electrochemical properties of ZnGa2O4 phosphor were investigated using X-ray diffractometer (XRD), scanning electron microscopy (SEM), energy dispersive X-ray spectroscopy (EDX), and cyclic voltammetry (CV). Finally, the prepared ZnGa2O4 electrode was

We experimentally demonstrate a controlled-not (CNOT) gate with vortex beams carrying orbital angular momentum (OAM) via light storage in a solid driven by electromagnetically induced transparency (EIT). We use vortex beams with different topological charges to perform EIT storage in the double lambda atomic system, the stored information is transferred into a new information channel. The topological

A novel two-photon fluorescent probe (ZC-F2) for selective recognizing Zn2+ and Cd2+ was designed and synthesized. By tuning the intramolecular charge transfer (ICT), ZC-F2 can recognize Zn2+ and Cd2+ through different emission colors in acetonitrile, the detection limit of Zn2+ and Cd2+ are 11.25 nM and 1.80 nM respectively. Moreover, ZC-F2 exhibits strong two-photon fluorescence emission when being

Photoluminescent (PL) layers and electroluminescent (EL) systems prepared by different methods have been systematically studied for the fabrication of flat panel displays, monitoring screens, and lighting systems. In this work we report about a new procedure of preparing Tb doped ZnGa2O4 green luminescent thin films at low temperature that consists of the simultaneous reactive magnetron sputtering

Eu2+ luminescence in the host of Na3Sc2(PO4)3 have attracted increasing attention due to its zero-thermal quenching phenomenon. In this paper, we have investigated a site modification strategy, in which Zn2+ is substituted for partial Sc3+ of the host lattice, and find such a strategy benefits great deal to Eu2+ luminescence. Through the solid-state reaction, a series of modified Na3Sc2-xZnx(PO4)3:0

Thermal quenching is one of the most key challenges of ultraviolet converted white light-emitting diodes (UV converted WLEDs) when they operate at high driving current, in which the phosphors are subjected to the luminescence losses resulting from non-radiative transitions with augmenting temperature. Herein, novel single-phased Bi3+,Sm3+-doped SrY2O4 (SYO) phosphors with abnormal thermal quenching

CdWO4:Sm single crystals were studied by optical, electron-paramagnetic and thermoluminescence spectroscopy in the temperature range of 4–750 K. A hopping diffusion of self-trapped excitons and energy transfer to Sm3+ centres is demonstrated. The mechanism of energy transfer includes the formation of a Sm3+ bound exciton either by direct excitation or in the result of a thermally stimulated hopping

The rare earth ions doped glassy materials have become crucial capstone in solid state lighting due to their top-notch optical properties. In this work, Eu3+ doped zinc-tungsten-antimonite glasses with compositions of (60 - x)Sb2O3 − 15WO3 – 25ZnO – xEu2O3 (where x is 0.5, 1.0, 1.5, 2.0, 2.5 and 3.0) were prepared by melt quenching technique. The glasses were prepared with the variation of concentration

Phenanthroimidazole-based cage-ligands 1 and 2 and their Eu(III), La(III) lanthanide complexes were synthesized and characterized. Schiff base condensation is the main step to obtain cage-shaped ligand design. Connection between clicked-phenanthroimidazole dipodal aldehyde and a fluorescent amine resulted great numbers of possible bindings that make the cage-shaped ligands suitable for lanthanide bindings

Nowadays, the fluorescent materials applying to the temperature sensing field are mostly based on the rare-earth ions, scarcely non-rare-earth co-doped optical thermometers have been invested, let alone the phosphors with dual transition metal ions. Herein, we advocate a novel rare-earth free activated fluorescent material co-doped with dual transition metal ions and adopt the fluorescence intensity

Improving the production cost and yield in next-generation infrared focal plane arrays have drawn attention towards the growth of absorbing material on large-area low-cost substrates while maintaining high material quality. In this paper, we study the structural and optical properties of InAsSb bulk layers grown on lattice-mismatched semi-insulating GaAs and Ge-on-Si (Ge/Si) substrates using molecular

The Yb3+: CaLaGa3O7 crystal with high-quality was grown successfully by the Czochralski method. The structure parameters of Yb3+: CaLaGa3O7 crystal are determined by the X-ray Rietveld refinement method. The absorption and fluorescence spectra, fluorescence lifetime and laser performance parameters were investigated in detail. The large absorption cross-section (1.14 × 10−20 cm2 for π-polarization

Tellurite-zinc glasses doped with Er3+, Yb3+ and Tm3+ were fabricated by conventional melt-quenching technique and characterised by absorption spectroscopy, refractive index, lifetime measurements, excitation, luminescence and up-conversion spectroscopy. Tunable blue to cold white light emission based on the colour mixing of red, green and blue light was obtained via up-conversion under 980 nm and

A series of Tm-doped GdAlO3 crystals with different concentration of Tm were synthesized by the Floating Zone method, and then scintillation properties particularly in the near-infrared range were studied. It was confirmed that all the materials showed several emission peaks due to the 4f-4f transitions of Tm3+ peaking around 800, 1450, and 1610 nm. Both photoluminescence and scintillation decay curves

Temperature-dependant photoluminescence (PL) properties of CdSe/CdTe quasi-Type-II QDs are studied using steady-state PL spectroscopy. It is observed that the PL intensity decreased as the temperature increased due to non-radiative thermal escapes and surface trap relaxations. The inverse relationship between PL peak energy and the temperature is ascribed to the exciton-phonon coupling and lattice

Broad tunable solid-state lasers in the near-infrared region are urgently demanded due to their critical applications in optical communications, eye-safe imaging, medicine and spectroscopy, and Cr4+-based lasers exhibit good application prospect in this area. Herein, we reported a new near-infrared tunable laser crystal of Cr-doped Ca3NbGa3Si2O14 (Cr:CNGS). By employing the Czochralski method, single

In this paper, with the modified Bridgeman method, 1 mol% Ho, x mol% Pr: BaY2F8 (x = 0, 0.2, 0.5, 0.8, 1.2) crystals were successfully prepared and their emission properties were studied. The X-ray diffraction data of the crystals showed that the crystals still maintained the monoclinic structure of the host. The infrared emission spectra showed that the doping of Pr3+ ions weakened the intensity of

As a kind of rare earth luminescent material, the development of white light-emitting glass cannot be ignored. Here, we successfully prepared series of Tm3+-Dy3+ co-doped P2O5-SrO-BaO-ZnO glasses. Structural analysis showed that the glass network is mainly composed of orthophosphate, pyrophosphate, and metaphosphate units. In the case of a certain content of Tm3+ or Dy3+, the densities of PSBZ glasses

We report on the growth of a co-doped divalent-metal monotungstate crystal, Yb3+,Li+:ZnWO4, its structure refinement, thermo-mechanical properties and polarized Raman spectra. Yb3+,Li+:ZnWO4 crystals are grown by the Czochralski method using Pt/Rh and Pt crucibles. The nature of crystal coloration is discussed and assigned to color centers based on oxygen vacancies as well as Fe2+(Fe3+) species and