Luminescent properties of Ba2ZnSi2O7:Eu3+ phosphors prepared by sol-gel process
State Key Laboratory of Materials Processing and Die & Mould Technology, College of Materials Science and Engineering, Huazhong University of Science & Technology, Wuhan 43007, P.R. China
Corresponding author: firstname.lastname@example.org
Accepted: 27 July 2009
Published online: 2 October 2009
A novel red phosphor Ba2ZnSi2O7:Eu3+ has been synthesized by sol-gel method. The crystallinity, particle size, morphology, chemical composition and luminescent properties were characterized by X-ray diffraction (XRD), transmission electron microscope (TEM), energy-dispersion spectrum (EDS) and spectrofluorometer, respectively. The results of thermogravimetric (TG) and XRD indicated that the Ba2ZnSi2O7:Eu3+ phosphors crystallized completely at 900 °C. The luminescent properties of phosphor showed red emission is obtained by exciting at 394 and 465 nm which are owing to the sharp 7F0 5L6 and 7F0 5D2 lines of Eu3+. Two strongest lines at 394 and 465 nm in excitation spectra of the phosphor match well with the two popular emissions from near-ultraviolet (UV) and blue GaN-based light emitting diodes (LEDs), so it could be used as red components for white LEDs.
PACS: 42.70.-a – Optical materials / 78.67.Bf – Nanocrystals and nanoparticles / 87.15.mq – Luminescence
© EDP Sciences, 2009