利用溶胶-凝胶法结合高温热处理在硅衬底上制备了掺Mn硅酸锌薄膜, 用XRD、SEM、UV-Vis吸收谱和PL谱测试了样品的结晶性能与光学性能, 并分析了热处理温度对掺Mn硅酸锌薄膜的结晶性能和光学性能的影响. 实验结果发现, ZnO的适量存在对掺Mn薄膜的发光有增强作用. 进一步的分析认为, 这一现象的机理可由G.G. Qin提出的量子约束-发光中心 (QCLC) 模型进行解释, ZnO中受激发的电子和空穴通过隧穿效应到达硅酸锌基体中复合发光, 从而增强发光强度.
Magnesium-doped zinc silicate (Zn2SiO4:Mn) was prepared on oxidized silicon wafer by a simple sol-gel process. The crystallinity of films was characterized by X-ray diffraction and optical properties were measured by UV-Vis and photoluminescence spectra. The influence of annealing temperature on films properties was also studied systematically. It’S found that proper ZnO can enhance the photoluminescence intensity of Zn2SiO4:Mn films. And the mechanism was explained by using the model of quantum confinement-luminescence center proposed by G.G. Qin.
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