Deep red emitting Mg2La2SnO7:Mn4+ phosphor: Synthesis and luminescence properties. (December 2018)

• Record Type: Journal Article
• Authors: Cao, Renping; Cheng, Xinyu; Su, Lei; Chen, Ting; Guo, Siling; Zheng, Guotai; Ao, Hui; Li, Wensheng
• Is Part Of: Materials research bulletin. Volume 108(2018)
• Page Start: 32
• Page End: 37
• Publication Date: 2018-12
• Subjects: Phosphors -- Mg2La2SnO7:Mn4+ -- Luminescence properties -- Deep red emission; Materials -- Periodicals; Crystal growth -- Periodicals; Matériaux -- Périodiques; Cristaux -- Croissance -- Périodiques; Crystal growth; Materials; Periodicals; 620.11
• DOI: 10.1016/j.materresbull.2018.08.037
• Languages: English
• ISSNs: 0025-5408

Abstract

Graphical abstract: Highlights: Novel Mg2 La2 SnO7 :Mn 4+ deep-red-emitting phosphor is synthesized in air. Emission band peaking at ∼ 706 nm is observed in the range of 640–780 nm. The thermal stability and luminous mechanism is explained. Abstract: Mg2 La2 SnO7 :Mn 4+ phosphor is synthesized by the solid-state reaction method in air. Monitored at 706 nm, excitation spectrum of Mg2 La2 SnO7 :Mn 4+ phosphor including peaks at ∼ 300, 333, 395, and 516 nm can be observed in the range of 220–600 nm. With excitation at 333 nm, emission band of Mg2 La2 SnO7 :Mn 4+ phosphor is shown in the range of 640–780 nm owing to the 2 E → 4 A2 transitions of Mn 4+ ion. The optimal Mn 4+ ion concentration is ∼ 0.3 mol% in Mg2 La2 SnO7 :Mn 4+ phosphor. The lifetime decreases from 1.23 to 0.83 ms with the increase of Mn 4+ concentration from 0.1 to 1.2 mol%. There is only one luminescence center (Mn 4+ ) in Mg2 La2 SnO7 :Mn 4+ phosphor, which is confirmed by the luminescence properties, decay curves, and time-resolved emission spectra. Mg2 La2 SnO7 :Mn 4+ phosphor has good thermal stability. Luminous mechanism is explained by energy level diagram of Mn 4+ ion and the thermal quenching phenomenon is analyzed by the configuration coordinate diagram of Mn 4+ ion.