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Synthesis and characterization of novel Li3Ba2Gd3 (MoO4)8:RE3+ (RE3+ = Pr3+, Sm3+) phosphors

ANTHUVAN JOHN PETER1,* , I. B. SHAMEEM BANU2

Affiliation

  1. Department of Physics, St. Anne’s College of Engineering and Technology, Panruti, Tamilnadu, India
  2. Department of Physics, B. S. Abdur Rahman University, Vandalur, Chennai, Tamilnadu, India

Abstract

A series of Li3Ba2Gd3–xPrx (MoO4)8 and Li3Ba2Gd3–xSmx (MoO4)8 red phosphors were synthesized by conventional solid state reaction method. For 7 mol % of Pr3+ and for 8 mol% of Sm3+ concentration, the phosphors exhibit a strong excitation peak at 450 nm (blue light) and 401 nm (near UV) indicating an intense absorption. The PL emission spectra of Li3Ba2Gd3 (MoO4)8:Pr3+ and Li3Ba2Gd3 (MoO4)8:Sm3+ phosphors showed an intense peak at 645 nm (red) which corresponds to 3P0→3F2 transition of Pr3+ and at 604 nm (red) which corresponds to4G5/2→ 6H7/2 transition of Sm3+. Our results indicate that Li3Ba2Gd3 (MoO4)8 is a potential host material for Pr3+ and Sm3+ and Li3Ba2Gd3 (MoO4):RE3+ (RE3+= Pr3+, Sm3+) is capable of converting the blue /near UV emission of a light-emitting diode into red light..

Keywords

Phosphors, Photoluminescence, Solid state reaction method, Red light.

Citation

ANTHUVAN JOHN PETER, I. B. SHAMEEM BANU, Synthesis and characterization of novel Li3Ba2Gd3 (MoO4)8:RE3+ (RE3+ = Pr3+, Sm3+) phosphors, Optoelectronics and Advanced Materials - Rapid Communications, 10, 7-8, July-August 2016, pp.472-478 (2016).

Submitted at: May 10, 2015

Accepted at: Aug. 3, 2016