| 纳晶稀土复合氧化物Dy1-xSrxCoO3-y I. 荧光特性及其机理研究 |
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| 引用本文： | 魏坤,石燕,贺伦燕.纳晶稀土复合氧化物Dy1-xSrxCoO3-y I. 荧光特性及其机理研究[J].化学学报,1998,56(6):589-593. |
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| 作者姓名： | 魏坤 石燕 贺伦燕 |
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| 作者单位： | 南昌大学稀土工程中心 |
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| 摘 要： | 研究了在紫外(UV)激发下纳晶Dy1-xSrxCoO3-y(0.0≤x≤1.0)的荧光特性及其发光机理。结果表明, 纳晶Dy1-xSrxCoO3-y的荧光为量子限域型光致发光, 这源于纳晶的尺寸量子化效应, 其发光机理为量子限域模型。Dy^3^+的自身浓度猝灭机理为电隅极-电四极相互作用。纳晶电偶极跃迁的振子强度为3.256×10^-^6～41.00×10^-^6, 摩尔消光系数为0.8581-10.82。
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| 关 键 词： | 氧化钴 跃迁 复氧化物 氧化锶 氧化镝 纳米相材料 发光机理 |
| 修稿时间： | 1997年2月12日 |
Nanocrystalline rare earth mixed oxides Dy1-xSrxCoO3-y 1: Study on fluorescence characteristics and luminescence mechanism |
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| WEI Kun,SHI Yan,HE Lun-Yan.Nanocrystalline rare earth mixed oxides Dy1-xSrxCoO3-y 1: Study on fluorescence characteristics and luminescence mechanism[J].Acta Chimica Sinica,1998,56(6):589-593. |
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| Authors: | WEI Kun SHI Yan HE Lun-Yan |
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| Abstract: | The fluorescence characteristics and luminescence mechanism of nanocrystallines Dy1-xSrxCoO3-y (0.0≤x≤1.0) samples were studied. The results show that the fluorescence of nanocrystallines Dy1-xSrxCoO3-y are quantum confinement photoluminescence. Because of the optical band gap variation, the quantum confinement effect is yielded. Its luminescence mechanism quenching of Dy^3^+ is an electric dipole-quadrupole interaction. The oscillator strength of dipole transfition of nanocrystallines Dy1-xSrxCoO3-y are 3.256×10^-^6～41.00×10^-^6. The molar extinction coefficients are 0.8581-10.82. |
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| Keywords: | nanocrystallines photoluminescence mechanism concentration self-quenching mechanism f-f transfition |
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