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Rare-Earth Activated Nitride Phosphors: Synthesis, Luminescence and Applications

Nitride Particle Group, Nano Ceramics Center, National Institute for Materials Science, Namiki 1–1, Tsukuba, Ibaraki 305–0044, Japan
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Materials 2010, 3(6), 3777-3793; https://doi.org/10.3390/ma3063777
Received: 17 May 2010 / Accepted: 17 June 2010 / Published: 21 June 2010
(This article belongs to the Special Issue Luminescent Materials)
Nitridosilicates are structurally built up on three-dimensional SiN4 tetrahedral networks, forming a very interesting class of materials with high thermomechanical properties, hardness, and wide band gap. Traditionally, nitridosilicates are often used as structural materials such as abrasive particles, cutting tools, turbine blade, etc. Recently, the luminescence of rare earth doped nitridosilicates has been extensively studied, and a novel family of luminescent materials has been developed. This paper reviews the synthesis, luminescence and applications of nitridosilicate phosphors, with emphasis on rare earth nitrides in the system of M-Si-Al-O-N (M = Li, Ca, Sr, Ba, La) and their applications in white LEDs. These phosphors exhibit interesting luminescent properties, such as red-shifted excitation and emission, small Stokes shift, small thermal quenching, and high conversion efficiency, enabling them to use as down-conversion luminescent materials in white LEDs with tunable color temperature and high color rendering index. View Full-Text
Keywords: nitride; luminescence; LED nitride; luminescence; LED
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Xie, R.-J.; Hirosaki, N.; Li, Y.; Takeda, T. Rare-Earth Activated Nitride Phosphors: Synthesis, Luminescence and Applications. Materials 2010, 3, 3777-3793.

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