Synthesis and photoluminescence characterization of Ce3+ and Dy3+ activated ALa(WO4)2(A = Na and Li) novel phosphors

Bulletin of materials science

S J Dhoble¹  Parag Nimishe¹ 

[1] Department of Physics, RTM Nagpur University, Nagpur 440 033, India$$Department of Physics, RTM Nagpur University, Nagpur 440 033, IndiaDepartment of Physics, RTM Nagpur University, Nagpur 440 033, India$$

关键词: XRD;    photoluminescence;    NUV excitation;    novel phosphor;    solid state lighting.;   

DOI  :  

学科分类：材料工程

来源: Indian Academy of Sciences

【 摘 要 】

In this paper, we report the synthesis of Ce³⁺ and Dy³⁺ activated alkali lanthanide tungstates, ALa(WO₄)₂(where A = Na and Li), prepared by solid state reaction method. The prepared phosphors were characterized by X-ray diffraction and photoluminescence techniques. The NaLa(WO₄)₂:Dy³⁺ and LiLa(WO₄)₂:Dy³⁺ phosphors show two emission peaks at around 574 and 486 nm (ðœ�?_exc = 354 nm). NaLa(WO₄)₂:Ce³⁺ and LiLa(WO₄)₂:Ce³⁺ show two emission peaks at around 378 and 425 nm (ðœ�?_exc = 350 nm). Excitation wavelengths of Ce³⁺ and Dy³⁺ activated alkali lanthanide tungstates are in near UV region i.e. Hg free excitation. These characterizations of phosphors are applicable for solid state lighting. Accordingly, Ce³⁺ and Dy³⁺ activated NaLa(WO₄)₂ and LiLa(WO₄)₂ may be the promising materials for solid state lighting applications.

【 授权许可】

Unknown