| CaSb2O6:Bi3+,Eu3+荧光粉的制备和发光性质 |
| Synthesis and Luminescence of CaSb2O6:Bi3+, Eu3+ Phosphors |
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| 摘要: 采用共沉淀法及1 200 ℃后续煅烧4 h,成功制备了CaSb2O6:Bi3+,Eu3+荧光粉,并对其结构及发光性能进行了研究。所制备荧光粉颗粒为六边形类圆饼状,平均尺寸在100~600 nm之间。对CaSb2O6:Bi3+,Eu3+发光的机理分析表明,Bi3+对Eu3+的发光存在高效的敏化与能量传递。当Bi3+和Eu3+的掺杂浓度分别为0.5%和8%,Eu3+位于580 nm(5D0→7F0 )处的荧光发射显著增强,Bi3+,Eu3+共掺样品的荧光强度是CaSb2O6:Eu3+的10倍左右。调节Bi3+/Eu3+离子掺杂比,色坐标呈现了从蓝、白光到红光的变化,表明该荧光粉可分别作为蓝或红色荧光粉使用,甚至可实现从蓝、白光到红光的自由调控,这为白光LED荧光粉的发展提供了参考。 |
| 关键词: CaSb2O6:Bi3+,Eu3+ 荧光粉 能量转移 发光增强 |
| 基金项目: 广东省自然科学基金研究团队项目(No.S2013030012842)资助项目。 |
| Abstract: The novel phosphors, Bi3+ and Eu3+ co-doped CaSb2O6 were obtained by co-precipitation technique followed by heat-treatment at 1 200 ℃ for 4 h. Their properties were investigated in detail. The phosphor has an average size of around 100~600 nm with hexagon round pie-like shape. It was found that the luminescence of Eu3+ ions in the CaSb2O6 could be efficiently sensitized by co-doping of Bi3+ ions involving energy transfer from Bi3+ to Eu3+. The 5D0→7F0 transition emission of Eu3+ was enhanced by a factor of ten when the Bi3+ content was 0.5% as compared to that of the sample without Bi3+ doped. Typically, it was observed that the CIE chromaticity coodinates varying from blue to white-light and eventually to red light could be achieved by tuning the relative ratio of Bi3+/Eu3+ in CaSb2O6:Bi3+, Eu3+. Hence, these results indicate that CaSb2O6:Bi3+, Eu3+ phosphors can serve as a potential application material for phosphor-converted white-light UV-LEDs. |
| Keywords: CaSb2O6:Bi3+, Eu3+ phosphors energy transfer enhanced luminescence |
| 投稿时间：2015-05-04 修订日期：2015-09-28 |
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| 陈东菊,汤利,林利添,邓超,曹丽伟,孟建新.CaSb2O6:Bi3+,Eu3+荧光粉的制备和发光性质[J].无机化学学报,2015,31(12):2279-2284. |
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