Achieving efficient Tb3+ dual-mode luminescence via Gd-sublattice-mediated energy migration in a NaGdF4 core-shell nanoarchitecture

作者：Ding, Mingye; Chen, Daqin^*; Wan, Zhongyi; Zhou, Yang; Zhong, Jiasong; Xi, Junhua; Ji, Zhenguo

来源：Journal of Materials Chemistry C, 2015, 3(21): 5372-5376.

DOI：10.1039/c5tc00881f

• DOPED NAYF4 NANOCRYSTALS
• UP-CONVERSION NANOPARTICLES
• CORE/SHELL NANOCRYSTALS
• FLUORIDE NANOCRYSTALS
• ENHANCED LUMINESCENCE
• ROOM-TEMPERATURE
• IN-VIVO
• EMISSION
• STRATEGY
• DESIGN

A strategy to realize dual-mode luminescence from identical Tb3+ is provided via Gd-sublattice-mediated energymigration and core-shell engineering techniques. By optimizing the structure of a NaGdF4:Yb/Tm@NaGdF4:Ce/Tb nanoarchitecture, both upconversion and downshifting emissions, originating from D-5(4) -> F-7(6,5,4,3) transitions of Tb3+, are achieved through Yb3+ -> Tm3+ -> [Gd3+](n) -> Tb3+ and Ce3+ -> [Gd3+](n) -> Tb3+ energy transfer processes, respectively.

• 出版日期2015
• 单位杭州电子科技大学