Tunable luminescence and energy transfer in Y₂BaAl₄SiO₁₂:Tb³⁺,Eu³⁺phosphors for solid-state lighting

Jie Wang¹，Xiusha Peng²，Danzhao Cheng²，Zhigang Zheng²，Hai Guo²

1. Department of Physics,Zhejiang Normal Untversity,Jinhua 321004,China2. Department of Physics,Zhejiang Normal Untversity

摘 要：Single-phase Y₂ BaAl₄ SiO₁₂:Tb³⁺,Eu³⁺phosphors with adjustable luminescence were successfully prepared by high-temperature solid-state reaction method.The structural,luminescent properties and ene rgy transfer（ET） process of Y₂ BaAl₄ SiO₁₂:Tb³⁺,Eu³⁺phosphors were syste matically analyzed with the help of X-ray diffraction（XRD）,scanning electron microscopy（SEM）,excitation spectra,emission spectra and photoluminescence decay curves.Tunable luminescence ranging from green through yellow and definitively to red can be achieved by elevating amounts of Eu³⁺ions in Tb³⁺,Eu³⁺co-doped samples.Besides,the ET mechanism and efficiency were also analyzed and the maximum ET efficiency is 67%.All the results show that Y₂ BaAl₄ SiO₁₂:Tb³⁺,Eu³⁺phosphors can be used in solid-state lighting.

关键词：