Increased 1D2 Red Emission of Pr3+ in NaGdTiO4:Pr3+ Due to Temperature-Assisted Host Sensitization and Its Color Variation
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- 作者：Su Zhang ; Hongbin Liang ; Chunmeng Liu
- 刊名：The Journal of Physical Chemistry C
- 出版年：2013
- 出版时间：February 7, 2013
- 年：2013
- 卷：117
- 期：5
- 页码：2216-2221
- 全文大小：425K
- 年卷期：v.117,no.5(February 7, 2013)
- ISSN：1932-7455
文摘
Temperature-dependent luminescent property of Pr3+-doped NaGdTiO4 is investigated systematically. Because of the intensive quenching of 3P0 emission, a red emission of 1D2鈥?sup>3H4 transition is observed in NaGdTiO4:Pr3+ at room temperature (RT). At 77 K, a broad band emission of host at about 475 nm (blue) is observed. Interestingly, the intensity of the red emission is increased with increasing temperature from 77 to 350 K and keeps nearly stable to 400 K under the host excitation, whereas a decrease of the blue host emission is presented. The results show that the increased red emission of 1D2 is associated with temperature-assisted energy transfer from host to Pr3+. Because the relative intensity of the 1D2 and host emission is sensitive to temperature, a large variation of color is also observed from 77 K to RT.