Open AccessPreparation and luminescent properties of Ca3Si3O9：Dy3+ phosphors for white LED
Author(s) -
Qi Zhi-Jian,
Weigang Huang
Publication year - 2013
Publication title -
wuli xuebao
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.199
H-Index - 47
ISSN - 1000-3290
DOI - 10.7498/aps.62.197801
Subject(s) - phosphor , luminescence , photoluminescence , materials science , emission intensity , analytical chemistry (journal) , emission spectrum , intensity (physics) , diffraction , photoluminescence excitation , spectral line , optics , optoelectronics , chemistry , physics , chromatography , astronomy
A novel Ca3Si3O9:Dy3+ phosphor for white LED was prepared by sol-gel method. The structure and luminescent properties of Ca3Si3O9:Dy3+ phosphors with different concentration of Dy3+ and charge compensator Li+ were characterized by X-ray diffraction (XRD) and photoluminescence (PL) spectra. Results show that the emission spectrum consists of two main band peaks locatied at 483 nm and 577 nm, while the peaks of excitation spectrum are located in the rang of 290–480 nm. Both of luminescent intensity and the ratio of yellow to blue emission (Y/B) increase first and then decrease with increasing Dy3+ concentration; and the luminescent intensity reaches a maximum when Dy3+ concentration is of 1 mol%. The luminescent intensity of Ca3Si3O9:Dy3+can be enhanced by Li+, and the blue emission increases greatly when Li+ concentration is within the range of 2 to 4 mol%.