Mei YANG, Duan GAO, Xuezhu SHA, Xin CHEN, Li WANG, Yanqiu ZHANG, Xiangqing ZHANG, Baojiu CHEN. Quantum Cutting Mechanism and Efficiency in Tm3+/Yb3+ -doped NaLu（WO4）2 Phosphors[J]. Acta Photonica Sinica, 2025, 54(2): 0231004
- Acta Photonica Sinica
- Vol. 54, Issue 2, 0231004 (2025)
Fig. 1. XRD patterns of NaLu（WO4）2∶x mol% Tm3+ （x=0.5~50.0）， and NaLu（WO4）2∶1.0 mol% Tm3+， y mol% Yb3+ （y=0.5~20.0） samples and the standard data reported in JCPDS card No. 27-0729
Fig. 2. Excitation spectra for NaLu（WO4）2：x mol% Tm3+ （x=0.5~50.0） samples by monitoring 796 nm emission
Fig. 3. Emission spectra of NaLu（WO4）2：x mol% Tm3+ （x=~50.0） phosphors under 279 nm excitation
Fig. 4. 300~900 nm emission spectra， and 700~1 200 nm emission spectra for NaLu（WO4）2∶1 mol% Tm3+/y mol% Yb3+ （y=0~20.0） phosphors under 279 nm excitation
Fig. 5. Fluorescence decays of 1D2， 1G4， 3F2， 3， and 3H4 levels of Tm3+ in NaLu（WO4）2∶1.0 mol% Tm3+/y mol% Yb3+（y=0~20.0） phosphors
Fig. 6. Energy level diagram and quantum cutting routes of Tm3+ and Yb3+ co-doped NaLu（WO4）2 phosphors
Fig. 7. Dependences of energy transfer ET1 efficiency， energy transfer ET2 efficiency， quantum efficiency of 2F5/2 level of Yb3+ and quantum cutting efficiency on Yb3+ concentration
Fig. 8. Fluorescence decays for 2F5/2→2F7/2 transition of Yb3+ in NaLu（WO4）2∶1 mol% Tm3+/y mol%Yb3+（y=0.5，1.0，5.0，10.0，20.0）phosphors
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