| 近紫外激发Gd2ZnTiO6∶Eu3+,Li+红色荧光粉的制备及荧光性能 |
| |
| 引用本文： | 张王曦月,周琦,周恒为,蒋小康.近紫外激发Gd2ZnTiO6∶Eu3+,Li+红色荧光粉的制备及荧光性能[J].人工晶体学报,2021,50(12):2269-2275. |
| |
| 作者姓名： | 张王曦月 周琦 周恒为 蒋小康 |
| |
| 作者单位： | 伊犁师范大学物理科学与技术学院,新疆凝聚态相变与微结构实验室,伊宁 835000 |
| |
| 基金项目： | 新疆维吾尔自治区高校科研计划(XJEDU2017S049);伊犁师范大学科研项目(2021YSYB101) |
| |
| 摘 要： | 采用溶胶-凝胶法成功制备出系列Eu3+掺杂和Li+、Eu3+共掺杂Gd2ZnTiO6红色荧光粉,并研究Li+、Eu3+掺杂对样品的晶体结构、微观形貌及发光性能的影响。结果显示,所制备的Gd2ZnTiO6∶Eu3+,Li+(GZT∶Eu3+,Li+) 荧光粉为双钙钛矿结构,属于单斜晶系(空间群:P21/n),大小为10 μm的无规则形状的颗粒。在395 nm近紫外光的激发下,GZT∶Eu3+的发射光谱展示出典型的Eu3+线状特征光谱,发射峰中心位于615 nm处,归属于Eu3+的5D0→7F2跃迁。Eu3+的最佳掺杂浓度为0.07(摩尔分数),样品显示明显的浓度猝灭效应,其机制为电偶极子-电偶极子(d-d)相互作用。此外,研究还发现,Li+掺杂对样品的晶体结构、微观形貌没有影响,但是一定量的Li+掺杂可以显著增强样品的荧光强度。当Li+浓度为0.05时,荧光粉发射主峰强度增强程度最大,提高至原来的4.3倍,说明通过Li+、Eu3+共掺杂可以获得高亮度的GZT红色荧光粉。GZT∶0.14Eu3+,0.05Li+荧光粉的CIE色坐标为(0.631 1,0.375 3)与标准红光色坐标(0.670,0.330)较为接近,是一种潜在的LED用红色荧光粉。
|
| 关 键 词： | Gd2ZnTiO6 溶胶-凝胶法 Li+、Eu3+共掺杂 双钙钛矿 红色荧光粉 |
| 收稿时间： | 2021-08-05 |
Preparation and Photoluminescence Properties of Red-Emitting Phosphor Gd2ZnTiO6∶Eu3+,Li+ under Near-UV Light Excitation |
| |
| ZHANG Wangxiyue,ZHOU Qi,ZHOU Hengwei,JIANG Xiaokang.Preparation and Photoluminescence Properties of Red-Emitting Phosphor Gd2ZnTiO6∶Eu3+,Li+ under Near-UV Light Excitation[J].Journal of Synthetic Crystals,2021,50(12):2269-2275. |
| |
| Authors: | ZHANG Wangxiyue ZHOU Qi ZHOU Hengwei JIANG Xiaokang |
| |
| Affiliation: | Xinjiang Laboratory of Phase Transitions and Microstructures in Condensed Matter Physics, College of Physical Science and Technology, Yili Normal University, Yining 835000, China |
| |
| Abstract: | A series of Eu3+ doped and Li+, Eu3+ co-doped Gd2ZnTiO6 (GZT) red-emitting phosphors were successfully prepared by sol-gel method. The effects of Li+ and Eu3+ ions doping on the crystal structure, microstructure and luminescent properties of the samples were studied. Results show that the obtained double perovskite Gd2ZnTiO 6∶Li+,Eu3+(GZT∶Li+,Eu3+) phosphors crystallized in the monoclinic space group P21/n and are composed of irregular particles with the size of 10 μm. Under the excitation of 395 nm near ultraviolet light, the emission spectrum of GZT∶Eu3+ shows a typical linear characteristic spectrum of Eu3+ ions. The center position of the emission peak is located at 615 nm, which belongs to the 5D0→7F2 transition of Eu3+. The optimum doping concentration of Eu3+ is 0.07 (mole fraction). The obtained samples show obvious concentration quenching effect, and its mechanism can be identified as the electric dipole-dipole interactions(d-d). In addition, it is also found that Li+ doping has no effect on the crystal structure and micro morphology of the samples, but a certain amount of Li+ doping can significantly enhance the fluorescence intensity of the samples. When the concentration of Li+ is 0.05, the intensity of the main emission peak of the phosphor is the largest, which is 4.3 times of the original, indicating that high brightness GZT red-emitting phosphor can be obtained by co-doping Li+ and Eu3+. The CIE color coordinates of GZT∶0.14Eu3+,0.05Li+ phosphor is located at (0.631 1,0.375 3) close to the standard red color coordinates (0.670, 0.330), which is a potential red-emitting phosphor for LED. |
| |
| Keywords: | Gd2ZnTiO6 sol-gel method Li+ Eu3+ co-doping double perovskite red-emitting phosphor |
|
| 点击此处可从《人工晶体学报》浏览原始摘要信息 |
|
点击此处可从《人工晶体学报》下载全文 |
|
