Deep red emitting Mg2La2SnO7:Mn4+ phosphor: Synthesis and luminescence properties

Journal Article · Sat Dec 15 04:00:00 EST 2018 · Materials Research Bulletin

DOI:https://doi.org/10.1016/J.MATERRESBULL.2018.08.037· OSTI ID:22805344

Cao, Renping; Cheng, Xinyu; Su, Lei; Chen, Ting; Guo, Siling; Zheng, Guotai; Ao, Hui; Li, Wensheng ^[1]

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1. College of Mathematics and Physics, Jinggangshan University, Ji’an, 343009 (China)

Highlights: • Novel Mg{sub 2}La{sub 2}SnO{sub 7}:Mn{sup 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: Mg{sub 2}La{sub 2}SnO{sub 7}:Mn{sup 4+} phosphor is synthesized by the solid-state reaction method in air. Monitored at 706 nm, excitation spectrum of Mg{sub 2}La{sub 2}SnO{sub 7}:Mn{sup 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 Mg{sub 2}La{sub 2}SnO{sub 7}:Mn{sup 4+} phosphor is shown in the range of 640–780 nm owing to the {sup 2}E → {sup 4}A{sub 2} transitions of Mn{sup 4+} ion. The optimal Mn{sup 4+} ion concentration is ∼ 0.3 mol% in Mg{sub 2}La{sub 2}SnO{sub 7}:Mn{sup 4+} phosphor. The lifetime decreases from 1.23 to 0.83 ms with the increase of Mn{sup 4+} concentration from 0.1 to 1.2 mol%. There is only one luminescence center (Mn{sup 4+}) in Mg{sub 2}La{sub 2}SnO{sub 7}:Mn{sup 4+} phosphor, which is confirmed by the luminescence properties, decay curves, and time-resolved emission spectra. Mg{sub 2}La{sub 2}SnO{sub 7}:Mn{sup 4+} phosphor has good thermal stability. Luminous mechanism is explained by energy level diagram of Mn{sup 4+} ion and the thermal quenching phenomenon is analyzed by the configuration coordinate diagram of Mn{sup 4+} ion.

• OSTI ID: 22805344
• Journal Information: Materials Research Bulletin, Journal Name: Materials Research Bulletin Vol. 108; ISSN MRBUAC; ISSN 0025-5408
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
AIR
EMISSION SPECTRA
ENERGY LEVELS
EXCITATION
LUMINESCENCE
MAGNESIUM COMPOUNDS
MANGANESE IONS
PHOSPHORS
SOLIDS
SYNTHESIS
TIME RESOLUTION