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采用化学自发燃烧法制备了立方相不同粒径的纳米晶Y2O3:Eu(1 mol%),并通过退火处理得到了体相材料,测量了它们的发射谱和处在C2格位上Eu3+的5D0能级室温和10 K下的荧光衰减曲线。利用发射光谱数据计算了Eu3+在不同粒径纳米晶体Y2O3中的光学跃迁强度参数Ωλ(λ=2,4),通过对室温和低温下5D0能级荧光衰减的测量,用两种不同方法估计了处在C2格位上Eu3+的5D0能级的量子效率,对所获得的结果进行了讨论,并对两种获得量子效率不同方法进行了评价。
Nanocrystalline Y2O3: Eu (1 mol%) with different particle sizes was prepared by chemical spontaneous combustion. The bulk materials were obtained by annealing. Their emission spectra and the emission spectra of Eu3 + at 5D0 Fluorescence decay curves at room temperature and 10 K. The optical transition intensity parameter Ωλ (λ = 2,4) of Eu3 + in nanocrystalline Y2O3 with different particle sizes was calculated by using the emission spectrum data. The fluorescence decay of 5D0 at room temperature and low temperature was measured by two different methods The quantum efficiency of the 5D0 level of Eu3 + at the C2 position is discussed, and the results obtained are discussed. Two different methods of obtaining quantum efficiency are evaluated.