Synthesis and Photoluminescence Properties of Sr2Si5N8 : Eu2 + Red Phosphor by a Gas-Reduction and Nitridation Method
Synthesis and Photoluminescence Properties of Sr2Si5N8 : Eu2 + Red Phosphor by a Gas-Reduction and Nitridation Method
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DOI：
10.1149/1.2999278
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发表时间：
2008-12
影响因子：
3.9
通讯作者：
Huili Li;R. Xie;N. Hirosaki;Y. Yajima
中科院分区：
文献类型：
--
作者：
Huili Li;R. Xie;N. Hirosaki;Y. Yajima
以SrO-SiO2-Eu 2 O3系均相氧化物前驱体为原料，在流动的NH3和CH 4混合气体中，采用一种新颖、简单、高效的合成工艺--直接气相还原氮化法，成功地合成了Eu 2+激活的白色发光二极管用Sr 2Si 5 N8红色荧光粉。研究了样品的相纯度、形貌和发光性能。合成的粉末具有纯的Sr 2Si 5 N8相，并由细，亚微米尺寸的颗粒组成。在蓝光激发下，Sr 2Si 5 N8：Eu 2+荧光粉具有高的发光强度、高的量子效率和很低的热猝灭，与固相反应法制备的荧光粉相当。
Eu 2+ -activated Sr 2 Si 5 N 8 red phosphor for white light-emitting diodes was successfully synthesized by an innovative, simple and efficient synthetic process, direct gas-reduction and nitridation of the homogeneous oxide precursor of the SrO-SiO 2 -Eu 2 O 3 system in the flowing NH 3 and CH 4 mixture gas. The phase purity, morphology, and luminescence properties were investigated. The synthesized powders have a pure Sr 2 Si 5 N 8 phase and consist of fine, sub-micrometer-sized particles. Under the blue light excitation, Sr 2 Si 5 N 8 :Eu 2+ phosphor shows excellent luminescence properties, such as high emission intensity, high quantum efficiency, and very low thermal quenching, which is comparable to those of phosphors fabricated by the solid-state reaction method.