Investigation of Temperature Dependence on Emission Properties of Sr-Al-O:Eu2+ Phosphor Synthesized Using Elemental Diffusion from Substrate
Investigation of Temperature Dependence on Emission Properties of Sr-Al-O:Eu2+ Phosphor Synthesized Using Elemental Diffusion from Substrate
复制标题
利用基底元素扩散合成的 Sr-Al-O:Eu2 荧光粉发射特性的温度依赖性研究
DOI：
10.1088/1757-899x/18/10/102017
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发表时间：
2011
期刊：
影响因子：
--
通讯作者：
H. Saitoh
中科院分区：
文献类型：
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作者：
K. Komatsu;A. Nakamura;A. Kato;S. Ohshio;H. Akasaka;H. Saitoh
通过Mg的元素扩散得到Sr-Al-O：Eu ~（2+）蓝色荧光粉。以金属-乙二胺四乙酸（EDTA）络合物氧化法制备Sr-Al-O：Eu粉体，在1500 °C还原条件下烧结，得到Sr-Al-O：Eu 2+荧光粉。研究了Mg的元素分布、晶体结构和发光性能的温度依赖性。Mg通过烧结从MgO基体扩散到Sr-Al-O：Eu粉体中，改变了粉体的晶体结构和发光性能。Mg的加入使SrAl_2 O_4的晶相数由单相增加到七相。由于Mg的加入，在300 K时，520 nm处的发射峰向460和510 nm处的发射峰移动。在低于250 K的温度下从粉末观察到的蓝色发射在添加Mg后观察到高达300 K。这些结果表明Mg在Sr-Al-O晶体中的扩散影响了由于热原子振动引起的发射能量损失的限制。
A blue Sr-Al-O:Eu2+ phosphor was obtained by the elemental diffusion of Mg. The Sr-Al-O:Eu2+ phosphor was synthesized by the sintering at 1500 °C under a reduction condition with and without a MgO substrate from Sr-Al-O:Eu powder, which was fabricated by the oxidation of metal-ethylenediaminetetraacetic(EDTA) complexes. The elemental distribution of Mg, the crystal structure and the temperature dependence of photo-emission properties were investigated for these phosphors. Mg diffused into Sr-Al-O:Eu powders from the MgO substrate by sintering, and brought changes to the crystalline structure and its emission properties. The number of crystalline phases was increased from one phase of SrAl2O4 to seven phases of Sr-Al-O by Mg addition. The emission peak at 520 nm shifted to peaks at 460 and 510 nm at 300 K owing to the addition of Mg. The blue emission observed from the powder at temperatures lower than 250 K was observed up to 300 K upon the addition of Mg. These results suggested that the diffusion of Mg into Sr-Al-O crystal affected the limitation of emission energy loss due to thermal atomic vibration.