Enhanced 1G4 emission in NaLaF4: Pr3+, Yb3+ and charge transfer in NaLaF4: Ce3+, Yb3+ studied by fourier transform luminescence spectroscopy
Enhanced 1G4 emission in NaLaF4: Pr3+, Yb3+ and charge transfer in NaLaF4: Ce3+, Yb3+ studied by fourier transform luminescence spectroscopy
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DOI：
10.1016/j.optmat.2010.08.010
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发表时间：
2011-05
影响因子：
3.9
通讯作者：
E. V. D. Kolk;O. M. T. Kate;J.W.E. Wiegman;D. Biner;K. Krämer
中科院分区：
文献类型：
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作者：
E. V. D. Kolk;O. M. T. Kate;J.W.E. Wiegman;D. Biner;K. Krämer
本文报道了用InGaAs探测器和傅里叶变换干涉仪研究NaLaF_4：1%Pr ~（3+），5%Yb ~（3+）和NaLaF_4：1%Ce ~（3+），5%Yb ~（3+）在紫外到近红外光谱范围内的高分辨发光。虽然发生了Pr 3+（3 P0 → 1G 4），Yb 3+（2F 7/2→ 2F 5/2）的能量转移步骤，但在993，1330和1850 nm处观察到了明显的Pr 3 + 1G 4发射。在Pr 3+和Yb 3+之间的下转换过程中的第二能量转移步骤没有实验证据可以给出。NaLaF4：Ce 3+，Yb 3+的荧光光谱表明，在Ce 3 +5d激发下观察到的Yb 3+的发光是电荷转移过程而不是下转换的结果。
A high resolution luminescence study of NaLaF4: 1%Pr3+, 5%Yb3+and NaLaF4: 1%Ce3+, 5%Yb3+in the UV to NIR spectral range using a InGaAs detector and a fourier transform interferometer is reported. Although the Pr3+(3P0→1G4), Yb3+(2F7/2→2F5/2) energy transfer step takes place, significant Pr3+1G4emission around 993, 1330 and 1850nm is observed. No experimental proof for the second energy transfer step in the down-conversion process between Pr3+and Yb3+can be given. In the case of NaLaF4: Ce3+, Yb3+it is concluded that the observed Yb3+emission upon Ce3+5d excitation is the result of a charge transfer process instead of down-conversion.