Tunable multicolor and enhanced red emission of monodisperse CaF2:Yb3+/Ho3+ microspheres via Mn2+ doping
Tunable multicolor and enhanced red emission of monodisperse CaF2:Yb3+/Ho3+ microspheres via Mn2+ doping
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通过 Mn2 掺杂实现单分散 CaF2:Yb3 /Ho3 微球的可调多色和增强红光发射
DOI:
10.1016/j.optmat.2018.03.048
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发表时间:
2018-05
影响因子:
3.9
通讯作者:
Xu Xiaojun
中科院分区:
文献类型:
--
作者:
Wang Rui;Yuan Maohui;Zhang Chaofan;Wang Hongyan;Xu Xiaojun
Transition metal ions (e.g. Mn2+) and lanthanide co-doped upconversion (UC) materials have attracted wide attention in recent years due to their promising application in multicolor display. Here, we report the hydrothermal synthesis and characterization of Mn2+doped monodisperse CaF2:Yb3+/Ho3+microspheres. The results of X-ray diffraction (XRD) revealed that Mn2+doping does not change the cubic phase of CaF2material but will lead to diffraction peaks shifting slightly towards higher angle due to the substitution of larger Ca2+by the relatively smaller Mn2+. Under the excitation of 980 nm continuous wave (CW) laser, these microspheres exhibit green-yellow-red tuning colors and remarkable enhancement of both red to green ratio (R/G) and red to blue ratio (R/B) when increasing Mn2+concentration from 0 to 30 mol%. The energy migration process between Ho3+and Mn2+was proposed and supported by time-decay and power dependence measurements of Ho3+UC emission. These upconversion materials may have potential applications in optical devices, color display, nanoscale lasers and biomedical imaging.
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