Thermal loading induced near-infrared broadband upconversion emission of Sm3+-doped β-NaYbF4 nano-phosphors

被引：20
|
作者：
Wang, Xiangfu [1 ]
Yan, Xiaohong [1 ,2 ]
Kan, Caixia [1 ]
机构：
[1] Nanjing Univ Aeronaut & Astronaut, Coll Sci, Nanjing 211106, Peoples R China
[2] Nanjing Univ Aeronaut & Astronaut, Sch Optoelect Engn, Nanjing 210046, Peoples R China
来源：
JOURNAL OF LUMINESCENCE | 2011年 / 131卷 / 11期
基金：
中国国家自然科学基金;
关键词：
Sm3+; Cooperative sensitization; Thermal loading; Up-conversion; NAYF4; NANOCRYSTALS; COMBUSTION SYNTHESIS; ENERGY-TRANSFER; GLASS-CERAMICS; SM3+ IONS; LUMINESCENCE; YB3+; NANOPARTICLES; SPECTROSCOPY; ENHANCEMENT;
D O I：
10.1016/j.jlumin.2011.05.028
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
A non-closed hydrothermal synthetic processing is improved to synthesize Sm3+ doped beta-NaYbF4 nano-phosphors at 98 degrees C without any high-temperature and high-pressure treatments as a final step. Novel green, red, and near-infrared broadband (799-873 nm) upconversion emissions of Sm3+-doped beta-NaYbF4 nano-phosphors under 980 nm excitation are observed. These UC emissions can be assigned to the Sm3+ transitions of (4)G(j), F-4(3/2) and F-6(11/2)-> H-6(j). The half-width of 873 nm emission band is broadened nearly two-fold through the annealing treatment for nano-phosphors. The upconversion process in Yb3+-Sm3+ system is discussed based on energy transfer mechanisms. (C) 2011 Elsevier B.V. All rights reserved.
引用
收藏
页码：2325 / 2329
页数：5
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