Journal of Inorganic Materials ›› 2017, Vol. 32 ›› Issue (9): 936-942.doi: 10.15541/jim20160623

• Orginal Article • Previous Articles     Next Articles

Synthesis and Photoluminescence Properties of Double Perovskite NaLaMgWO6: Eu3+ Red Phosphor

Gui-Fang LI(), Qian YANG, Yun-Ge WEI   

  1. School of Advanced Materials and Nano Technology, Xidian University, Xi’an 710071, China
  • Received:2016-11-15 Revised:2017-02-10 Online:2017-09-30 Published:2017-08-29

Abstract:

Series of NaLa1-xEuxMgWO6 (0≤x≤1) novel red phosphors were successfully synthesized by the conventional solid state method. The crystal structure, morphology, and luminescence properties of NaLa1-xEuxMgWO6 phosphors were characterized by X-ray powder diffraction (XRD), scanning electron microscopy (SEM) and fluorescence spectra (PL), respectively. XRD results show that NaLaMgWO6 phosphor has monoclinic double perovskite structure with space group C2/m. The excitation and emission spectra show that NaLaMgWO6: Eu3+ phosphor can be effectively excited by near-UV (397 nm) and blue light (465 nm), and exhibits the strongest red emission peak located at 617 nm, which is ascribed to 5D07F2 transition of Eu3+ ion. The optimal doping concentration of Eu3+ is determined to be x=0.5. It can be confirmed that the dipole-dipole interaction plays an important role in the energy transfer in NaLaMgWO6: Eu3+ phosphors through the concentration quenching curve. In addition, Judd-Ofelt theory is employed to evaluate various radiative parameters, such as the refractive index, the J-O parameters (Ωλ) and the branching ration (β).

Key words: NaLaMgWO6: Eu3+ red phosphors, photoluminescence, concentration quenching, Judd-Ofelt theory

CLC Number: 

  • TQ174