LiGaTiO4:Mn4+ red phosphor: Synthesis, luminescence properties and emission enhancement by Mg2+ and Al3+ ions. Issue 11 (15th August 2016)

• Record Type: Journal Article
• Authors: Cao, Renping; Huang, Jijun; Ceng, Xiangfeng; Luo, Zhiyang; Ruan, Wen; Hu, Qianglin
• Is Part Of: Ceramics international. Volume 42:Issue 11(2016)
• Page Start: 13296
• Page End: 13300
• Publication Date: 2016-08-15
• Subjects: Powders: Solid state reaction -- Optical properties -- Functional applications; Ceramics -- Periodicals; Céramique industrielle -- Périodiques; Ceramics; Periodicals; Electronic journals; 666
• DOI: 10.1016/j.ceramint.2016.05.138
• Languages: English
• ISSNs: 0272-8842

Abstract

Abstract: Novel LiGaTiO4 :Mn 4+ and LiGaTiO4 :Mn 4+, R (R=Mg 2+ and Al 3+ ) phosphors are synthesized by solid-state reaction method in air. Emission spectra of LiGaTiO4 :Mn 4+ phosphor with excitation 330, 395, and 470 nm contain three emission bands peaking at ~668, 680, and 696 nm in the range of 610–800 nm, and excitation spectrum monitored at 668 nm contains broad excitation band with three excitation peaks located at ~330, 395, and 480 nm within the range 250–600 nm, which indicate that LiGaTiO4 :Mn 4+ phosphors can be effectively excited by ultraviolet, near ultraviolet, and blue light-emitting diode chips. The optimal Mn 4+ doping concentration is ~0.6 mol% in LiGaTiO4 :Mn 4+ phosphor. Time resolved luminescence spectra and these lifetime data indicate that it is only a single type of Mn 4+ ion luminescent center in LiGaTiO4 :Mn 4+ phosphor. Emission intensity of LiGaTiO4 :Mn 4+ phosphor may be enhanced 1.3–2.2 times by co-doping Mg 2+ and Al 3+ ions. The luminous mechanism of Mn 4+ ion is analyzed by Tanabe-Sugano energy diagram and configurational coordinate diagram.