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化学学报
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化学学报 ›› 1998, Vol. 56 ›› Issue (6): 589-593. 上一篇    下一篇

研究论文

纳晶稀土复合氧化物Dy1-xSrxCoO3-y I. 荧光特性及其机理研究

魏坤;石燕;贺伦燕   

  1. 南昌大学稀土工程中心
  • 发布日期:1998-06-15

Nanocrystalline rare earth mixed oxides Dy1-xSrxCoO3-y 1: Study on fluorescence characteristics and luminescence mechanism

WEI KUN;SHI YAN;HE LUNYAN   

  • Published:1998-06-15

PDF

625

被引次数

32

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。

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

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.

Key words: COBALT OXIDE, TRANSITION, DOUBLE OXIDE, STRONTIUM OXIDE, DYSPROSIUM OXIDE, NANOPHASE MATERIALS, LUMINESCENCE MECHANISM

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