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- W2104332395 abstract "New nitride compound phosphors of MIIMIIISi4N7:Eu2+ (MII = Ca, Sr, Ba / MIII = Sc, La) with the same composition as SrYSi4N7:Eu2+ were successfully synthesized from MIICO3, MIII2O3, Eu2O3, and Si3N4 raw materials using carbon powder as a reductant by optimizing the synthesis conditions such as carbon amount and heating temperature as follows: amount of carbon; 66–90 at% to stoichiometric ratio, heating condition; 1000°C for 2 h followed by 1550°C for 6 h in flowing N2 atmosphere. From the structural analysis including Rietveld refinement, the crystal structure of MIIScSi4N7 host lattices were the same as SrYSi4N7 and crystallized in a hexagonal symmetry (P63mc), whereas SrLaSi4N7:Eu2+ crystallized in an orthorhombic one (Pmmm). The resultant MIIScSi4N7:Eu2+ and SrYSi4N7:Eu2+ phosphors were effectively excited by near-UV light (390 nm) and showed green and yellow emission, respectively, suggesting that these compounds are noted as one of the light components to fabricate white LED by combining with near-UV LEDs. The optimal Eu2+ concentration for SrScSi4N7:Eu2+ was 4 at% and the thermal stability of this sample was comparable to commercially available Y3Al5O12:Ce3+ yellow phosphor." @default.
- W2104332395 created "2016-06-24" @default.
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- W2104332395 date "2012-01-01" @default.
- W2104332395 modified "2023-10-16" @default.
- W2104332395 title "Structure and Photoluminescence Properties of M<sup>II</sup>M<sup>III</sup>Si<sub>4</sub>N<sub>7</sub>:Eu<sup>2+</sup>(M<sup>II</sup>= Ca, Sr, Ba / M<sup>III</sup>= Sc, Y, La) Phosphors Prepared by Carbothermal Reduction and Nitridation" @default.
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- W2104332395 doi "https://doi.org/10.1149/2.005204jss" @default.
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