NIR-to-blue, green, orange and white up-conversion luminescence in Yb3+/Tm3+/Er3+/Ho3+-doped Na0.5Gd0.5WO4 nanocrystals

作者：Xia, Zhiguo^*; Due, Haiyan; Sun, Jiayue

来源：Journal of Optoelectronics and Advanced Materials, 2010, 12(5): 975-979.

• Optical materials
• Phosphors
• Upconversion luminescence
• Optical properties

Yb3+/Tm3+/Er3+/Ho3+-doped Na0.5Gd0.5WO4 nanocrystals have been fabricated by a facile hydrothermal method. The blue, green and orange upconversion (UC) emissions coming from Yb3+/Tm3+, Yb3+/Er3+, Yb3+/Ho3+ dopant ions are observed in this, study. Bright white luminescence upon 980 nm excitation can be produced via the UC process by tuning the dopant ions Yb3+/Tm3+/Ho3+, which consists of the blue, green and red UC emissions, and they correspond to the transitions (1)G(4) -> H-3(6) of Tm3+, F-5(4)(S-5(2)) -> (5)/(8), and F-5(5) -> (5)/(8) of Ho3+ ions, respectively. The UC mechanisms and temperature dependent UC luminescence were also discussed.

• 出版日期2010-5
• 单位中国地质大学（北京）; 北京工商大学