溶胶-凝胶法制备Ca3Al2O6:Eu3+红色荧光粉及其发光性能 |
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引用本文: | 肖宗梁,黄昕,游维雄,赖凤琴,叶信宇,段龙飞. 溶胶-凝胶法制备Ca3Al2O6:Eu3+红色荧光粉及其发光性能[J]. 有色金属科学与工程, 2016, 0(2): 43-47. DOI: 10.13264/j.cnki.ysjskx.2016.02.008 |
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作者姓名: | 肖宗梁 黄昕 游维雄 赖凤琴 叶信宇 段龙飞 |
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作者单位: | 1. 江西理工大学材料科学与工程学院,江西 赣州,341000;2. 江西理工大学冶金与化学工程学院,江西 赣州,341000;3. 江西理工大学冶金与化学工程学院,江西 赣州 341000; 江西理工大学高端稀土发光材料及器件研究所,江西 赣州 341000 |
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基金项目: | 国家自然科学基金资助项目(51304086);江西理工大学重点学科立项科研项目 |
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摘 要: | 采用溶胶-凝胶法合成Ca3Al2O6:Eu3+红色荧光粉,通过XRD、SEM、荧光光谱分别对样品的结构、形貌以及发光性能进行表征,讨论煅烧温度、Eu3+掺杂浓度以及电荷补偿剂对样品发光性能的影响.结果表明:实验所得样品的结构与Ca3Al2O6相同,Eu3+掺杂并没有改变其晶体结构.合成的荧光粉在394 nm近紫外光激发下发出615 nm明亮的红光.样品的红光强度随着煅烧温度的升高先增加后减弱,最佳烧结温度为1200℃.同样红光强度也随着Eu3+掺杂浓度的增加先增加后减弱,最佳Eu3+掺杂浓度为4%(摩尔分数).加入电荷补偿剂后样品的发光强度均增强,其中加入K+后发光增强的效果最显著.该铝酸盐红色荧光粉性质稳定,在白光LED近紫外芯片激发中具有潜在的应用.
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关 键 词: | 溶胶-凝胶法 Ca3Al2O6:Eu3%2B 红色荧光粉 LED |
Preparation of Ca3Al2O6:Eu3+red phosphor by sol-gel method and its photoluminescence properties |
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Abstract: | The Ca3Al2O6:Eu3+red phosphor was synthesized by sol-gel method. The structure, shape and luminous property of the sample were characterized by the XRD, SEM, and fluorescence spectrum to investigate the in-fluence of sintering temperature, Eu3+ion doping concentration, and charge compensations doping on the sam-ple. The results show that the sample′s crystal phase is the same with Ca3Al2O6 crystal structure and their crys-tal structure does not change with the invasion of Eu3+ion. The synthesized phosphor, excited by 394 nm NUV-light, emits 615 nm bright red light. The emission intensity rises first with the increasing of the sintering tem-perature and then decreases and reaches at peak when sintering temperature is 1 200 ℃. At the same time, the emission intensity of the sample increases first and then decreases with the increasing of the concentration of Eu3+ion and the optimal doping concentration of Eu3+ion is 4 mol%. Besides, the emission intensity rises with doping charge compensations which doped with K+ion has the best luminescent properties. This red phosphor of aluminates is stable, which has potential application prospect in the stimulating of White-LED′s NUV-chip. |
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Keywords: | sol-gel method Ca3Al2O6:Eu3+ red phosphor LED |
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