ZrO_2上转换反蛋白石光子晶体的制备及发光调控研究

Preparation and Upconversion Luminescence Properties of ZrO_2 Inverse Opal Photonic Crystals

采用自组装方法和溶胶凝胶法制备了光子带隙位于489和543nm的2种Yb^(3+),Tb^(3+)共掺杂的ZrO_2反蛋白石光子晶体,并研究了光子带隙对Tb^(3+)离子490和545nm的上转换发光的调控。研究发现:Yb^(3+),Tb^(3+)共掺杂的ZrO_2反蛋白石光子晶体的光子带隙对Tb^(3+)的490nm(~5D4→~7F6)和545nm(~5D4→~7F5)的上转换发光有显著的影响。当Tb^(3+)离子的发射光谱带与光子禁带重合时,在光子带隙调制作用下,Tb^(3+)的上转换发光受到明显的抑制。通过调节光子晶体的周期结构可以实现对稀土Tb^(3+)的蓝光和绿光的上转换发射的调控。

We synthesized the ZrO_2: Yb^(3+), Tb^(3+) upconversion inverse opal photonic crystals based on a self-assembly technique and a sol-gel method, and investigated its upconversion emission properties. The obvious effects of the photonic stopband on the upconversion luminescence of the 5D4→7F6and 5D4→7F5 transitions of Tb^(3+) has been observed in the inverse opals of the Yb^(3+), Tb^(3+) co-doped Zr O_2.Significant suppression of the upconversion emission was observed when the Tb^(3+) ions emission band overlapped with the photonic stop band. The modification of the upconversion luminescence properties of blue and green upconversion emission of Tb^(3+)ions is achieved by controlling the structure of the photonic crystal.