采用溶剂热方法对ZnO纳米颗粒进行对溴苯甲酸(BBA)表面化学改性,获得了BBA表面包覆率(CBBA)不同的ZnO纳米颗粒,并分别用傅里叶变换红外光谱(FT-IR)、X射线晶体衍射(XRD)、扫描电子显微镜(SEM)和紫外-可见吸收光谱(UV-Vis)对改性前后的纳米颗粒产物进行了表征.结果表明:BBA改性可以在很大程度上减轻纳米颗粒的团聚并改善它们在有机溶剂(如氯苯、无水乙醇)中的分散性能;同时,改性化学反应并不会改变原来晶体的生长特性.分别将改性前后的ZnO纳米颗粒用作有机/无机杂化太阳电池中的电子受体材料,发现改性对电池性能具有显著的改善作用,并揭示了电池效率(η)对包覆率(CBBA)的依赖关系.
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