Open AccessCe3+/Mn2+-activated Ca7(PO4)2(SiO4)2: efficient luminescent materials for multifunctional applications
Author(s) -
Jia Zhang,
Lei Zhao,
Xintian Bian,
Guibin Chen
Publication year - 2018
Publication title -
optics express
Language(s) - Uncategorized
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.26.00a904
Subject(s) - phosphor , materials science , luminescence , analytical chemistry (journal) , quantum efficiency , light emitting diode , doping , absorption (acoustics) , emission spectrum , absorption spectroscopy , solid state lighting , ultraviolet , optoelectronics , optics , spectral line , chemistry , physics , chromatography , astronomy , composite material
To develop new efficient phosphors for LEDs based on multifunctional applications, a series of Ce 3+ /Mn 2+ activated Ca 7 (PO 4 ) 2 (SiO 4 ) 2 (CPS) samples were prepared by solid-state reaction method. Upon 365 nm excitation, a broad emission band around 439 nm in the Ce 3+ -single-doped CPS was observed. The optimal Ce 3+ concentration was determined to be 3%, for which the quantum efficiency was obtained to be 90.4%, higher than that of the commercial BAM phosphor. By monitoring 458 nm, an intense and broad excitation band was found from 240 to 400 nm, which can match well with the near-ultraviolet (NUV) LED chip. For Ce 3+ -Mn 2+ codoped CPS, a new red emission band belonging to Mn 2+ appeared and an energy transfer from Ce 3+ to Mn 2+ was confirmed. It was also found that the emission spectra of Ce 3+ /Mn 2+ could well cover the optical absorption bands of plants. The fabrication of the phosphors on NUV LED chip indicates that the present phosphors could be promising in solid lighting and plants growth.