Ultraviolet to near-infrared energy transfer in NaYF4:Nd3+,Yb3+ crystals

作者：Dong Xiaobin; You Fangtian^*; Peng Hongshang; Huang Shihua

来源：Journal of Rare Earths, 2016, 34(9): 863-867.

DOI：10.1016/S1002-0721(16)60107-2

• energy transfer
• rare earth ions
• NIR
• NaYF4

To convert ultraviolet (UV) light into near-infrared (NIR) light in phosphors is demanded for the development of solar cells. A series of NaYF4:Nd3+, Yb3+ white powder samples were prepared via the hydrothermal method. The crystal structure and photoluminescence properties of the samples were carefully studied using X-ray diffractometry (XRD) and photoluminescence spectra. The excitation and emission spectra of NaYF4:Nd3+, Yb3+ samples and the luminescence decay curves of Nd3+ and Yb3+ revealed an efficient energy transfer process from Nd3+ to Yb3+. This process resulted in the Yb3+ NIR fluorescent emission at 980 nm. Moreover, the lifetime of the Nd3+ F-4(3/2) level decreased with the increase of Yb3+ doping concentration. The build-up time of the decay curves of the Yb3+ F-2(5/2) level further verified the energy transfer process. Meanwhile, energy transfer efficiency based on different Yb3+ doping concentrations was achieved.

• 出版日期2016-9
• 单位北京交通大学