以Zn(NO3)2水溶液为电解液,用阴极电沉积法分别在透明导电玻璃ITO和FTO衬底上制备了ZnO薄膜.X射线衍射(XRD)和扫描电子显微镜(SEM)分析结果表明ZnO薄膜属六角纤锌矿结构,ZnO颗粒均匀,大小约1μm;在室温光致发光谱(PL)中(激发波长为385和390nm)分别观察到了波长位于439和442nm处的较强的蓝光发射峰.本文讨论了样品蓝光峰的发光机理,并指出蓝光峰与样品中由锌填隙引起的潜施主能级上的电子到价带的跃迁有关.
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