Photoluminescence study in Ce3+ activated M6B5AlO15 (M = Sr, Ca, Ba) and mixed host aluminoborate phosphors

Kharabe, V. R.; Oza, Abha H.; Dhoble, S.J.

doi:10.1016/j.ijleo.2013.11.021

Cited by 3 publications

(1 citation statement)

References 21 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…For general lighting applications such as in UV light-emitting diodes (LEDs), various photoluminescent materials including different classes such as oxides, silicates, aluminates, aluminoborates, aluminosilicates, borates, borophosphate play vital roles [1]. Among all these hosts, borophosphate phosphors are proved to be good candidates due to their advantages such as easy preparation and high luminescent brightness [2]. UV-LEDs are LEDs that emit UV-rays with a wavelength of approximately 400 nm or shorter.…”

Section: Introductionmentioning

confidence: 99%

Spectroscopic studies of undoped and Mn2+-doped calcium borophosphate phosphor (CaBP) nanopowders

et al. 2015

View full text Add to dashboard Cite

Undoped and Mn 2? -doped Ca 6 BP 5 O 20 nanopowders (CaBP) have been prepared by modified solid-state synthesis and characterized by spectroscopic investigations like X-ray diffraction (XRD), field emission scanning electron microscope with EDX, optical absorption, electron paramagnetic resonance, photoluminescence and Fourier transform infrared spectroscopy. From powder XRD patterns, the crystal structure is confirmed to be triclinic. Unit cell parameters, average crystal size, strain and dislocation densities have been calculated by using powder XRD data. Field emission scanning electron micrograph with EDX images, taken at different magnifications, shows that the prepared samples contain Ca, B, P, O, Mn species and micrographs exhibit irregular shaped spheres with agglomeration. By using optical absorption and electron paramagnetic resonance data, crystal field, inter-electronic repulsion and spin-Hamiltonian parameters have been evaluated. The site symmetry of Mn 2? ions is ascribed as octahedral sites with ligands. Fourier transform infrared spectra show the specific vibrations of phosphate and inorganic molecules. Photoluminescence spectra of undoped and Mn 2? -doped CaBP nanopowders exhibit pale yellow to white emission under the excitation wavelength of 325 nm. The CIE chromaticity coordinates have been also calculated from emission spectrum for undoped and Mn 2? -doped CaBP nanopowders.

show abstract

Section: Introductionmentioning

confidence: 99%