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1. 发光学及应用国家重点实验室 中国科学院长春光学精密机械与物理研究所,吉林 长春,130033
2. 中国科学院大学 北京,100049
收稿日期:2013-04-26,
修回日期:2013-05-20,
纸质出版日期:2013-08-10
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赵承周, 孔祥贵, 宋曙光, 李晓坤. Yb<sup>3+</sup>,Tm<sup>3+</sup>离子掺杂浓度对NaYF<sub>4</sub>:Yb<sup>3+</sup>,Tm<sup>3+</sup>发光光谱的影响[J]. 发光学报, 2013,34(8): 959-964
ZHAO Cheng-zhou, KONG Xiang-gui, SONG Shu-guang, LI Xiao-kun. Effect of Doping Rare-earth Concentrations on The Luminescence Spectrum of NaYF<sub>4</sub>:Yb<sup>3+</sup>,Tm<sup>3+</sup> Nanocrystals[J]. Chinese Journal of Luminescence, 2013,34(8): 959-964
赵承周, 孔祥贵, 宋曙光, 李晓坤. Yb<sup>3+</sup>,Tm<sup>3+</sup>离子掺杂浓度对NaYF<sub>4</sub>:Yb<sup>3+</sup>,Tm<sup>3+</sup>发光光谱的影响[J]. 发光学报, 2013,34(8): 959-964 DOI: 10.3788/fgxb20133408.0959.
ZHAO Cheng-zhou, KONG Xiang-gui, SONG Shu-guang, LI Xiao-kun. Effect of Doping Rare-earth Concentrations on The Luminescence Spectrum of NaYF<sub>4</sub>:Yb<sup>3+</sup>,Tm<sup>3+</sup> Nanocrystals[J]. Chinese Journal of Luminescence, 2013,34(8): 959-964 DOI: 10.3788/fgxb20133408.0959.
利用高温热溶剂法合成了不同Yb
3+
和Tm
3+
掺杂浓度的NaYF
4
:Yb
3+
Tm
3+
上转换发光纳米粒子。利用扫描电子显微镜、X射线衍射分析、荧光光谱对样品进行形貌和发光性质的表征。结果表明
不同Yb
3+
和Tm
3+
离子掺杂浓度对纳米粒子的上转换发光性质有很大影响。随着Tm
3+
离子浓度的提高
Tm
3+
离子之间的浓度猝灭和交叉弛豫效应对发光强度的影响愈来愈显著
导致纳米粒子的发光猝灭;同样
随着Yb
3+
浓度的提高
纳米粒子的发光强度也是先增大后减小
这是因为Yb
3+
离子浓度掺杂过高导致发光猝灭。
The NaYF
4
:Yb
3+
Tm
3+
nanocrystals were synthetized with different doping concentrations of Yb
3+
Tm
3+
ions by a thermal decomposition method. The morphology
crystalline phase and optical properties were characterized by scanning electron microscopy (SEM)
X-ray diffraction (XRD) and luminescent spectra.With the concentrations of Tm
3+
increasing
the emission intensity of Tm
3+
firstly increased and then decreased because of the effects of ion concentration quenching and cross relaxation between the neighboring Tm
3+
. The decrease of the luminescent intensity with the increase of Yb
3+
ions is due to the concentration quenching effect.
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