Showing papers in "Journal of Luminescence in 2007"

TL;DR: In this paper, a blue light emitting diode (LED) pumped white LED with yellow emitting (YAG:Ce) phosphor using addition of Pr and Tb as a co-activator and host lattice element, respectively.

TL;DR: In this paper, the interaction between the flavonoid hesperidin and bovine serum albumin (BSA) was investigated by fluorescence and UV/Vis absorption spectroscopy.

TL;DR: In this paper, the photoluminescence (PL) and exciton absorption in the absorption (UV) spectra are closely related to the post-annealing treatment of ZnO films.

TL;DR: A reduction phenomenon of Eu3+→Eu2+ was observed for the first time when Eu 3+ ions were doped into an AlO4-tetrahedron-containing compound BaAl2O4 in an oxidizing atmosphere of air by high-temperature solid-state reaction as discussed by the authors.

TL;DR: In this paper, the second and fourth rank crystal field (CF) parameters have been calculated together with the CF strength parameter by assuming the C2v symmetry for the Eu3+ ions in both the phosphate and fluorophosphate glasses.

TL;DR: In this paper, the authors used various techniques to study optical and scintillation properties of Ce-doped yttrium aluminum garnet, Y 3 Al 5 O 12 (YAG:Ce), in the form of a high-quality industrial single crystal.

TL;DR: In this article, nanocrystalline LiF:Mg, Cu, P of rod shape (about 30-40nm in diameter and 0.3-0.5μm in length) has been prepared by the chemical co-precipitation method.

TL;DR: In this paper, the electron-phonon and vibronic couplings governing the spectral properties have been studied in the Fenna-Matthews-Olson (FMO) bacteriochlorophyll a (BChl a )-protein complex at 4.5 K using a spectrally selective difference fluorescence line-narrowing technique.

TL;DR: In this paper, a novel gel-network precipitation method using gelatin as a template at lower temperature condition was used to synthesize nanopowders with a range from 20 to 40 nm.

TL;DR: In this article, the excited-state intramolecular proton transfer (ESIPT) mechanism in six amino 2-(2′-hydroxyphenyl)benzazole derivatives were investigated in different solvents by means of UV-vis absorption and steady-state fluorescence.

TL;DR: In this article, the optical properties of divalent europium activated Ca-α-SiAlON were investigated and the excitation and emission processes were discussed and it was revealed that the red-shift of emission would be caused by the construction of the package of optical device.

TL;DR: In this article, a combination of blue, green and red bands is shown for both silicate and phosphate glasses that allow the observation of white light when the glass is excited by UV light.

TL;DR: In this paper, a core/shell quantum dot was synthesized in an aqueous phase using thioacetamide as a sulfur source and the quantum yield was greatly enhanced by the epitaxial growth of a CdS shell, which was confirmed by X-ray photoelectron spectroscopy (XPS) results.

TL;DR: In this article, the blue, green and orange light emissions from such composite solution were tuned and stabilized by simply varying the concentration of CdS, cadmium and sulphur in the final product.

TL;DR: In this article, the afterglow spectra of a Sr 2 MgSi 2 O 7 :Dy 3+ phosphor emitting long-lasting white light was investigated.

TL;DR: In this paper, the excited state dynamics of the Pr 3+ in oxide lattices is revisited in the light of the virtual recharge model and the connection between the quenching of the blue-green emission from the 3 P 0 level and the formation of a metal intervalence charge-transfer state (IVCTS) is discussed on the basis of new experimental evidences.

TL;DR: In this article, a novel oxyfluoride glasses SiO 2 -Al 2 O 3 O 3 -Na 2 O -ZnF 2 doped with Ho 3+ and Ho 3 + /Yb 3+ were fabricated and the optical properties of the synthesized glasses were experimentally and theoretically investigated in detail.

TL;DR: In this article, the authors report on the UV laser-induced fluorescence of hexagonal boron nitride (h-BN) following nanosecond laser irradiation under vacuum and in different environments of nitrogen gas and ambient air.

TL;DR: In this paper, the VUV excitation spectra and visible emission spectra of Sr 3 Gd 0.94 (PO 4 ) 3 :0.01Dy with chromaticity coordinates in the white-light region are described.

TL;DR: In this article, the photoluminescent and cathodolumininescent spectra are described by the well-known 5 D 0 → 7 F J transition (J = 0, 1, 2, etc.).

TL;DR: In this article, the effects of the annealing temperature on the crystallization and luminescence properties of nanocrystalline Gd 2 O 3 :Eu 3+ powders with cubic phase were studied.

TL;DR: In this article, a powder phosphor yttrium aluminum garnet (YAG), activated with trivalent cerium (Ce 3+ ) is synthesized by combustion from mixed metal nitrate reactants and urea with ignition temperature of 500-550°C.

TL;DR: In this article, the Eu3+-doped SnO2:Eu nanoparticles were dispersed in silica matrix at a relatively low temperature of 185°C in ethylene glycol medium, and 119Sn and 29Si MAS NMR studies on this sample confirmed that there is no interaction between the tin and silicon structural units even after heating the samples at 900°C.

TL;DR: In this article, the crystalline structure and photoluminescence properties of europium-doped cerium dioxide synthesized by the solid-state reaction method were analyzed.

TL;DR: In this article, the X 3 MgSi 2 O 8 :Eu 2+, Mn 2+ (X = Ba, Sr, Ca) phosphors showed three emission peaks: the blue and green bands of Eu 2+, and the red band of Mn 2+, which are shifted toward longer-wavelength side with substituting X cations with smaller cations in the order of Ba, S, and Ca cations.

TL;DR: In this paper, a broad band of Ce 3+ activator was incorporated into the line peaks of Tb 3+ in YAG host without the reduction of emission intensity, which showed that more lattice defects involving in the energy absorption and transfer to Tb3+, are formed by the Ce 3+, codoping.

TL;DR: In this paper, the ultraviolet and visible upconversion properties of Er3+ in YAlO3 were investigated following 652.2-nm excitation of the multiples 4F9/2.

TL;DR: In this article, the spectral properties of Y 2 O 3 :Eu 3+ fibers were studied, in contrast with those of bulk powders, and the results indicated that the excited charge transfer band had slightly blue shift in comparison with that in the bulk due to weaker covalence of Eu-O bonds.

TL;DR: In this article, the luminescence properties of samarium ions-doped titanium dioxide prepared by the sol-gel process were studied and the energy transfer from TiO2 to Sm3+ was verified and the relevant mechanism was discussed.

TL;DR: In this paper, the absolute position of the energy levels of divalent and trivalent lanthanides with respect to the valence band and conduction band of a host compound are available and can be applied to many different compounds.