| 等价Ca、Sr离子固溶对CaTiO3:0.002Pr3+发光特性的影响 |
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| 引用本文： | 彭丽霞,洪樟连,周时风,王民权.等价Ca、Sr离子固溶对CaTiO3:0.002Pr3+发光特性的影响[J].无机材料学报,2005,20(5):1049-1053. |
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| 作者姓名： | 彭丽霞 洪樟连 周时风 王民权 |
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| 作者单位： | 1. 浙江大学材料科学与工程系; 2. 硅材料国家重点实验室, 杭州 310027 |
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| 基金项目： | 浙江省教育厅项目（20030265）;教育部留学回国人员科研启动基金（SRF for R0CS,SEM,2003-14）;国家自然科学基金（50272059）. |
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| 摘 要： | 利用高温固相反应法,制备了不同Sr/Ca比的(Ca1-xSrx)TiO3:0.002Pr3+(x=0-0.6)红色发光材料.荧光光谱与XRD测试结果表明:所有样品均发出源于Pr3+的1D2→3H4跃迁的612m红色光;发光强度与晶胞a轴均随固溶取代量x改变而连续变化,并在x=0.15的出现极值:发光强度提高约三倍,a轴则最小.研究揭示除不等价离子取代产生的电荷缺陷外,等价离子取代导致的固溶结构变化也是改变发光强度的有效途径.
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| 关 键 词： | 钙钛矿结构 CaTiO3 固溶 发光 |
| 文章编号： | 1000-324X（2005）05-1049-05 |
| 收稿时间： | 08 2 2004 12:00AM |
| 修稿时间： | 2004-08-022004-09-09 |
Effect of Sr2+ Substitution for Equivalent Ca2+ Ions on Luminescence Intensity of CaTiO3:0.002Pr3+ |
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| PENG Li-Xia,HONG Zhang-Lian,ZHOU Shi-feng,WANG Min-quan.Effect of Sr2+ Substitution for Equivalent Ca2+ Ions on Luminescence Intensity of CaTiO3:0.002Pr3+[J].Journal of Inorganic Materials,2005,20(5):1049-1053. |
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| Authors: | PENG Li-Xia HONG Zhang-Lian ZHOU Shi-feng WANG Min-quan |
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| Affiliation: | 1. Department of materials Science & Engineering; Zhejiang Unviersity; Hangzhou 310027, China; 2. State Key Laboratory of Silicon Materials; Zhejiang University; Hangzhou 310027, China |
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| Abstract: | Red phosphors (Ca1-xSrx)TiO3:0.002Pr3+ (x=0-0.6) were prepared by solid state reaction route and their properties were investigated by photoluminescence (PL) spectra and XRD, respectively. All samples have a red emission peak at 612nm due to the intra-4f transition of Pr3+ from 1D2 to 3H4 state. The results indicate that both emission intensity and a axis parameter show an extremum at x=0.15: the emission intensity is enhanced about 3 times, and the lattice parameter of a axis shows a minimum value. The results show that, besides the charge defects induced by unequilvalent ion substitution, the equilvalent Sr2+ substitution for Ca2+ can also influence the emission intensity through the crystal structure evolution. |
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| Keywords: | perovskite structure calcium titanate solid solution luminescence |
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