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Pressure-Controlled Synthesis of High-Performance SrLiAl3N4:Eu2+ Narrow-Band Red Phosphors

Abstract

SrLiAl3N4:Eu2+ (SLA) phosphor has gained increasing attention worldwide due to its narrow emission bandwidth and excellent thermal stability. In this study, a series of SLA phosphor is synthesized at gas pressure ranging from 1 atm to 1,000 atm using gas pressure sintering and hot isostatic press systems. Upon elevating the gas pressure in synthesis, the volume of unit cell slightly decreases while both the quantum efficiency and the particle size of SLA increase. The Eu2+/Eu3+ ratio also increases with applied pressure, thereby enhancing the luminescence intensity of the phosphor materials. The presence of Li defects in the host material is evidenced by inductively coupled plasma with atomic emission spectroscopy. The mechanism of controlling the oxidation state of Eu and defect formation is proposed to elucidate the behavior of phosphor under different applied pressure levels in synthesis. Finally, the LED package shows that SLA could be a potential candidate for backlighting.

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Publication details

The article was received on 20 Jun 2018, accepted on 25 Jul 2018 and first published on 27 Jul 2018


Article type: Communication
DOI: 10.1039/C8TC03025A
Citation: J. Mater. Chem. C, 2018, Accepted Manuscript
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    Pressure-Controlled Synthesis of High-Performance SrLiAl3N4:Eu2+ Narrow-Band Red Phosphors

    M. Fang, Y. Tsai, H. Sheu, J. Lee and R. Liu, J. Mater. Chem. C, 2018, Accepted Manuscript , DOI: 10.1039/C8TC03025A

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