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| H03+:Ba0.8Sr0.2Ti03纳米粉体的光谱性质研究 | |
| 引用本文： | 吴继清,屈少华,章天金.H03+:Ba0.8Sr0.2Ti03纳米粉体的光谱性质研究[J].湖北大学学报(自然科学版),2011,33(4):479-482,489. |
| 作者姓名： | 吴继清 屈少华 章天金 |
| 作者单位： | 1. 襄樊学院物理与电子工程学院,湖北襄樊441053;湖北大学材料科学与工程学院,湖北武汉430062 2. 襄樊学院物理与电子工程学院,湖北襄樊,441053 3. 湖北大学材料科学与工程学院,湖北武汉,430062 |
| 基金项目： | 国家自然科学基金，湖北省自然科学基金 |
| 摘 要： | 采用溶胶-凝胶法制备Ho3+:Ba0.8Sr0.2TiO3 (BST)纳米粉体.根据Judd-Ofelt理论对纳米粉体的吸收光谱进行拟合,得到晶体场强度参数Ω2、Ω4和Ω6分别为0.229×10-20、0.515×10-20和0.761×10-20cm2,并系统计算Ho3+各能级跃迁的振子强度、自发辐射跃迁几率、荧光分... |
| 关 键 词： | BST 纳米粉体 Judd-Ofelt理论 光谱性质 |
Spectroscopic properties of Ho3+: Ba0.8Sr0.2 TiO3 nanopowers |
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| WU Jiqing , QU Shaohua , ZHANG Tianjin.Spectroscopic properties of Ho3+: Ba0.8Sr0.2 TiO3 nanopowers[J].Journal of Hubei University(Natural Science Edition),2011,33(4):479-482,489. | |
| Authors: | WU Jiqing QU Shaohua ZHANG Tianjin |
| Institution: | 1.School of Physics and Electronic Engineering,Xiangfan University,Xiangfan 441053,China;2.School of Materials Science and Engineering,Hubei University,Wuhan 430062,China) |
| Abstract: | Ba0.8Sr0.2TiO3（BST） nanopowers doped with Ho3＋ were prepared by sol-gel method.Using the Judd-Ofelt theory,according to the absorption spectrum the intensity parameters Ωλ of Ho3＋ in BST nanopowers were fitted,Ω2 = 0.229×10-20 cm2,Ω4 =0.515×10-20 cm2 and Ω6=0.761×10-20 cm2,and then the values of the oscillator strength,radiative transition probabilities,branching ratios and radiative lifetime of Ho3＋ were calculated.Under excitation of 514 nm Ar＋ laser,the emission bands centered at about 549 nm,650 nm,706 nm and 753 nm corresponding to（5F4,5S2）→5I8、5F55→I8,5I4→5I8 and（5F4,5S2）→ 5I7 transition were observed.The stimulate emission cross-section of the emission bands centered at about 549、650、706 and 753 nm had been calculated,the values respective were 3.26×10-21、0.19×10-21、0.04×10-21、5.53×10-21 cm2.The results showed that the Ho3＋：BST nanomaterials were prospective candidates for applications in new photoelectric devices. |
| Keywords: | BST nanopowers Judd-Ofelt theory spectroscopic properties |
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