采用均匀沉淀法,在无任何催化剂的条件下,两步合成片状ZnO晶体.105℃干燥得到ZnO晶体前 驱物,400℃煅烧得到纯ZnO晶体.通过XRD、SEM、TEM、UV-vis和PL光谱等测试手段对ZnO晶体在两个不同热处理温度下的结构和光学性质进行表征.结果显示:ZnO晶体为六方纤锌矿结构,(0001)面形貌为规则的片状正六边形.热处理温度由105℃升至400℃,样品直径增加,透射率降低,禁带宽度减小,光致发光近带边发射峰强度减弱,位置红移.实验结果表明,热处理温度对均匀沉淀法合成ZnO晶体的光学性质存在一定影响.
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