Improved ultraviolet -visible optically transmittance and luminescent properties in Yb, Lu: Sr5(PO4)3F transparent ceramics via Lu3+ co-doping
Improved ultraviolet -visible optically transmittance and luminescent properties in Yb, Lu: Sr5(PO4)3F transparent ceramics via Lu3+ co-doping
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DOI：
10.1016/j.jeurceramsoc.2023.02.060
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发表时间：
2023-02
影响因子：
5.7
通讯作者：
Xinwen Liu;G. Tan;Zhiwei Zhou;B. Mei
中科院分区：
文献类型：
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作者：
Xinwen Liu;G. Tan;Zhiwei Zhou;B. Mei
非对称六方晶系Sr 5（PO 4）3F（S-FAP）晶体材料由于其大的吸收、发射界面和长的荧光寿命，被认为是未来最适合小型激光二极管泵浦的固体激光增益介质。然而，S-FAP透明陶瓷的透光率不高，Yb激活离子的掺杂使其发光性能下降，严重阻碍了其应用前景。鉴于此，采用热压烧结法制备了一系列光学性能优良的0.02Yb，xLu：S-FAP（x = 0-0.02）透明陶瓷。粉末的SEM结果表明，Lu掺杂对粉末的形貌、晶粒尺寸和分散性没有明显影响。线性透过率曲线表明，与未掺杂的陶瓷样品相比，Lu掺杂的陶瓷样品的紫外（200 nm）和可见（500 nm）透过率分别增加了54%和17%。陶瓷表面SEM显示，Lu 3+显著促进了陶瓷晶粒尺寸的增大。室温下的发射光谱和荧光衰减曲线也表明，Lu共掺杂显著提高了陶瓷样品的发射强度和荧光寿命。
The asymmetric hexagonal Sr5(PO4)3F (S-FAP) crystal material is considered to be the most suitable solid state laser gain medium for small laser diode pumping in the future due to its large absorption, emission interface, and long fluorescence lifetime. However, the mediocre optical transmittance of S-FAP transparent ceramics and the degradation of luminescence properties due to the doping of Yb activated ions seriously hinder its application prospects. In view of this, a series of 0.02Yb, xLu: S-FAP (x = 0–0.02) transparent ceramics with excellent optical properties were synthesized by hot pressing sintering. The powder SEM results show that Lu doping has no obvious effect on the morphology, grain size, and dispersion of powder. The linear transmissivity curves show that the ultraviolet (200 nm) and visible (500 nm) transmissivity increase by 54 % and 17 %, respectively, with Lu doping compared with the undoped ceramic samples. The surface SEM of ceramics revealed that Lu3+promoted the increase of ceramic grain size significantly. The emission spectrum and fluorescence decay curves at room temperature also show that the emission intensity and fluorescence lifetime of ceramic samples increase significantly with Lu co-doping.