Showing papers in "Journal of Luminescence in 2006"

TL;DR: In this article, a spectroscopic investigation of NaYF4 powders doped with several different concentrations of Er 3 +, Tm 3 + and/or Yb 3 + is described.

TL;DR: In this paper, the optical properties of SrSi2AlO2N3 doped with Eu2+ and Yb2+ are investigated towards their applicability in LEDs, and it is shown that Eu 2+-doped material shows emission in the green, peaking around 500 nm.

TL;DR: In this article, the aqueous synthesis conditions of CdTe nanocrystals (QDs) were systematically investigated, and it was found that the pH value and the concentrations of precursors significantly affected the photoluminescence quantum yield (QY) of cdTe QDs.

TL;DR: In this article, the Na9[EuW10O36]·14H2O polyoxometalate studied here has shown a peculiar 4f-4f emission spectrum that has two main differences in comparison to data reported previously in the literature: a 5D0→7F0 line with much smaller intensity and an abnormally high intensity of the 5D 0→ 7F4 transition.

TL;DR: In this article, the binding of trazodone hydrochloride (TZH) to bovine serum albumin (BSA) was investigated by spectroscopic (fluorescence, spectrophotometry and circular dichroism) techniques under simulative physiological conditions.

TL;DR: In this paper, the migration rate of Er2O3-doped TeO2-ZnO-La 2O3 modified tellurite glasses was calculated based on the electric dipole-dipole interaction theory.

TL;DR: In this paper, the luminescence properties of Ce3+, Li+ or Na+ co-doped alkaline-earth silicon nitride M2Si5N8 (M=Ca, Sr, Ba) are reported.

TL;DR: The influence of fluoride on the luminescence of LiEu M 2 O 8 (M =Mo, W) was studied in this article, where the authors showed that when doped with fluoride, the materials also formed solid solutions and the luminecence intensity was remarkably enhanced, which is a promising red component for solid-state lighting devices based on GaN light-emitting diodes.

TL;DR: In this article, Li et al. showed that 3 P 0 luminescence under UV excitation is completely quenched to 1 D 2 through a strong coupling with the charge transfer state at room temperature.

TL;DR: In this article, a fluorescence lifetime-based approach was proposed to determine the core-shell nanostructure of FITC-doped fluorescent silica nanoparticles (FSNPs).

TL;DR: In this paper, the gas phase synthesis of silicon quantum dots in a nonthermal plasma, and the subsequent organic surface passivation in the liquid phase are described, where various organic ligands such as octadecene, dodecence, and styrene are grafted onto the nanocrystal surfaces in a reaction known as hydrosilylation.

TL;DR: In this paper, the changes of spectra and energy level were studied in bulk and nanoscale powders of YAG:Re (Re = Ce, Pr, Tb) were synthesized by solid-state and sol-gel method.

TL;DR: In this article, surface plasmons on metallic nanoparticles can be used to enhance the electroluminescence of a silicon-on-insulator light-emitting diode at 900 nm using silver nanoparticles.

TL;DR: The nanocrystal samples of titanium dioxide doped with europium ion (Eu3+/TiO2 nanocrystals) are synthesized by the sol-gel method with hydrothermal treatment as discussed by the authors.

TL;DR: In this paper, the luminescence enhancement of Bi 3+ and RE 3+ -co-doped (Y,Gd)BO 3 phosphors was investigated and their luminescent properties under vacuum ultraviolet (VUV)/UV excitation were investigated.

TL;DR: In this article, the luminescence of two newly developed blue-emitting long afterglow phosphors, Sr2−xCax MgSi2O7:Eu2+, Dy3+ ( x = 0, 1), has been studied.

TL;DR: In this article, the authors used existing literature data to determine the location of the lowest 4f and lowest 5d states for each trivalent lanthanide ion in LaBr 3.

TL;DR: In this article, a facile hydrothermal method was used to synthesize cubic Y 2 O 3 nanostructures doped with Yb 3+ and Er 3+ ions, which exhibited strong visible upconversion luminescence under the excitation of a 978nm diode laser.

TL;DR: In this paper, a novel long-lasting phosphorescence phosphor, Mn2+-activated Mg2SnO4, has been synthesized and its optical properties have been investigated.

TL;DR: In this article, the authors observed that the dominant intrinsic defect, oxygen vacancies, creates a donor energy level at 0.38 eV below the bottom of the conduction band, which acts as a center for both PL emissions and to produce n-type conductivity in the electrodeposited Cu 2 O films.

TL;DR: In this article, photoluminescence experiments on colloidal, Co2+-doped ZnO nanocrystals were performed to study the electronic properties of Co2 in a znO host.

TL;DR: In this paper, the fluorescence quenching of 5-methyl-3-phenyl-2-[4′-amino-s-triazolo-3′-yl] indole-5′-hydrazide (MPIH) by aniline quencher in cyclohexane, benzene, toluene and dioxane solvents has been carried out at room temperature with a view to understand the quench mechanisms.

TL;DR: In this article, an increase of about 1% of the delivered power by a mono-crystalline commercial silicon solar cell has been obtained by coating the cell with an active polyvinylacetate film doped with a light harvesting phenanthroline-Eu 3 + complex.

TL;DR: In this article, photoluminescence, absorption and optical excitation spectra of undoped and Eu 3+ -doped binary zinc borate glasses of varied composition prepared by the melt quenching technique in air atmosphere were investigated.

TL;DR: In this article, the photoluminescence of anodic alumina membranes with ordered nanopore arrays fabricated in oxalic acid has been investigated under different annealing temperatures.

TL;DR: In this article, the position of the lowest 5d levels E(Ln,A) and charge transfer band E(ct) were calculated and compared with their excitation spectra.

TL;DR: In this article, the intensity of violet and blue fluorescence from the 5D3 level is highly dependent on terbium concentration, on the presence of Al3+ co-dopant, and on annealing conditions.

TL;DR: In this article, the emission bands from intra-ion transitions of Mn2+ and Eu3+ samples were studied as a function of pressure, and the pressure coefficient of Mn 2+ emission was found to be -25.3 +/- 0.5 and -28.5 +/- 0.9 meV/GPa for Zn2SiO4:Mn2+

TL;DR: In this article, the influence of surface effects on the self-activated (SA) luminescence in ZnS nanoparticles prepared by the wet-chemical method is presented.

TL;DR: In this article, the authors synthesize n-doped Zn2SiO4 phosphors with different morphology and crystal structure, which show different luminescence and photoluminescence intensity, without further calcining treatment.