Up-conversion luminescence properties and energy transfer of Tm3+/Yb3+ co-doped BaLa2ZnO5

作者：Xie Jing; Mei Lefu^*; Deng Junru; Liu Haikun; Ma Bin; Guan Ming; Liao Libing; Lv Guocheng

来源：Journal of Solid State Chemistry, 2015, 231: 212-216.

DOI：10.1016/j.jssc.2015.07.046

• Tm3+/Yb3+
• BaLa2ZnO5
• Luminescence
• Energy transfer

Tm3+ /Yb3+ co-doped BaLa2ZnO5 up-conversion (UC) phosphors were successfully synthesized by high temperature solid-state reaction method. The X-ray diffraction (XRD) results show that synthesized phosphor co-doped with 0.75% Tm/10% Yb has the optimum pure phase of BaLa2ZnO5 among different co-doping concentrations. The structure of BaLa2ZnO5:0.75% Tm/10% Yb phosphor was refined by the Rietveld method and results show the decreased unit cell parameters and cell volume after doping Tm3+ /Yb3+, indicating that Tm3+ /Yb3+ have successfully replaced La3+. Under excitation at 980 nm, Tm3+ /Yb3+ co-doped BaLa2ZnO5 phosphors present bright blue emission near 478 nm generated by the (1)G(4) -> H-3(6) transition and weak red emissions around 653 nm and 692 nm generated by the (1)G(4) -> F-3(4) and F-3(3) -> H-3(6) transitions of Tm3+, respectively. The UC luminescence properties of BaLa2ZnO5 phosphors codoped with different Tm3+ /Yb3+ concentrations were investigated, and the related UC mechanisms of Tm3+/Yb3+ co-doped BaLa2ZnO5 depending on pump power were studied in detail.

• 出版日期2015-11
• 单位中国地质大学（北京）