Synthesis of Nanosized Ce3+,Eu3+-Codoped YAG Phosphor in a Continuous Supercritical Water System
Synthesis of Nanosized Ce3+,Eu3+-Codoped YAG Phosphor in a Continuous Supercritical Water System
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DOI：
10.1021/ie800421w
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发表时间：
2008-07
影响因子：
4.2
通讯作者：
Jaewook Lee;Jae Hyuk Lee;E. Woo;H. Ahn;Joon-Soo Kim;Chang-Ha Lee
中科院分区：
文献类型：
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作者：
Jaewook Lee;Jae Hyuk Lee;E. Woo;H. Ahn;Joon-Soo Kim;Chang-Ha Lee
通过直接将氢氧化钾溶液和金属盐溶液加入超临界水（SCW）中，连续合成了 Ce3+ 和 Eu3+ 共掺杂的发光钇铝石榴石（Y3Al5O12）纳米颗粒（YAG:Ce3+,Eu3+）。使用连续SCW管式反应器研究了Ce3+与Eu3+浓度比对合成纳米粒子光致发光的影响。在SCW反应器中反应时间为20秒、pH值为9.10时，制备的荧光粉纳米颗粒的平均尺寸为60~150 nm，并且立方体或六角形颗粒与球形颗粒共存。由于Ce3+，荧光粉纳米颗粒在绿黄色光谱区呈现出宽的发射带，并且由于Eu3+，在红色光谱区中在610 nm附近呈现尖锐的发射峰。无需进一步热处理，在SCW条件下连续反应器中合成的YAG:Ce3+,Eu3+荧光粉表现出很强的发光性能。同时，红色光谱发射的增强...
Luminescent yttrium aluminum garnet (Y3Al5O12) nanoparticles codoped with Ce3+ and Eu3+ (YAG:Ce3+,Eu3+) were continuously synthesized by directly feeding potassium hydroxide solution and a metal salt solution to supercritical water (SCW). The effects of the Ce3+-to-Eu3+ concentration ratio on the photoluminescence of the synthesized nanoparticles were studied using a continuous SCW tubular reactor. At 20-s reaction time and a pH of 9.10 in the SCW reactor, the average size of the prepared phosphor nanoparticles was 60−150 nm and cubic or hexagonal particles coexisted with the spherical particles. The phosphor nanoparticles presented a broad emission band in the green-yellow spectral region due to Ce3+, as well as a sharp emission peak at around 610 nm in the red spectral region due to Eu3+. Without further thermal treatment, the YAG:Ce3+,Eu3+ phosphor synthesized in the continuous reactor under SCW conditions showed strong luminescence properties. Simultaneously, enhancement of the red spectral emission i...