论文部分内容阅读
以自组装法制备的面心立方结构的聚甲基丙烯酸甲酯(PMMA)蛋白石为模板,采用溶胶凝胶法制备二氧化铈(CeO2)掺杂铕离子(Eu3+)的反蛋白石结构光子晶体.利用XRD,SEM,UV-Vis等测量手段研究了光子禁带特性,样品在低温下的发光特性也被研究.结果表明CeO2:Eu3+反蛋白石的光子禁带是413nm,PMMA蛋白石的光子禁带是612nm,与理论计算结果十分吻合.且随着温度的降低,Eu3+离子所处晶体场的对称性下降.
The anti-opal structured photonic crystals doped with europium ions (Eu3 +) were prepared by sol-gel method using the face-centered cubic polymethylmethacrylate (PMMA) opal prepared by self-assembly method. The photonic band gap properties were investigated by means of XRD, SEM and UV-Vis measurements, and the luminescence properties of the samples at low temperature were also studied. The results show that the photon forbidden band of CeO2: Eu3 + inverse opal is 413 nm, the photon forbidden band of PMMA opal is 612nm, which is in good agreement with the theoretical calculation, and as the temperature decreases, the symmetry of the crystal field in the Eu3 + ion decreases.