Journal
CERAMICS INTERNATIONAL
Volume 47, Issue 13, Pages 18814-18823Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.ceramint.2021.03.217
Keywords
Antimonate; Luminescence; Mg2InSbO6; Phosphors; Plant-cultivation
Categories
Funding
- Undergraduate Innovation Fund of Northwest A&F University, China [S202010712006, 2010712314]
- Natural Science Foundation of Shaanxi Province, China [2018JM5055]
- Fundamental Research Funds for the Central Universities, China [2452019076]
- Hunan Provincial Key Laboratory of Xiangnan Rare-Precious Metals Compounds and Applications, China [2019XGJSKFJJ01]
- Construction Program of the key discipline in Hunan Province
- Projects of the Education Department of Hunan Province, China [18A465]
- Science and Technology Plan Project of Chenzhou city, China [jsyf2017014]
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Novel deep-red-emitting Mg2InSbO6:Mn4+ phosphors were successfully prepared via high-temperature solid-state reaction, exhibiting excellent emission properties and stability. The optimum concentration of Mg2InSbO6:0.3%Mn4+ was confirmed to be 0.3% mol and showed high color purity. These phosphors have potential for application in plant-cultivation LEDs.
In this study, novel deep-red-emitting Mg2InSbO6:Mn4+ phosphors were prepared through a high-temperature solid-state reaction. The as-prepared phosphors belong to the perovskite structure with the space group of R (3) over bar (No.148). The calculated energy gap value of Mg2InSbO6 is similar to 1.788 eV. Emission spectrum of the Mg2InSbO6:0.3%Mn4+ was obtained under 301 nm excitation, which centered 665 nm due to the E-2(g) ->(4)A(2g) transition. The optimum concentration of Mg2InSbO6:xMn(4+) is confirmed to 0.3% mol, and the concentration quenching effect is ascribed to the dipole-dipole interaction. The relative temperature-dependent PL spectra demonstrate that phosphors possess commendable repeatability and high activation energy. The chromaticity shift diagram shows the phosphors have good resistance of color drifting. The Mg2InSbO6:0.3%Mn4+ phosphor has a high color purity of 99.8%. Furthermore, a red light-emitting diode is fabricated with Mg2InSbO6:0.3%Mn4+ phosphor and a 365 nm near-ultraviolet chip. The emission spectrum of the red LED is perfectly overlapped with plant pigments (chlorophyll a and chlorophyll b) absorption spectrum. Thus, Mn4+-activated Mg2InSbO6:Mn4+ phosphors have the potential to apply in plant-cultivation LEDs.
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