摘要
文章采用一种热蒸发的方法在镀有Zn膜的掺F的SnO2(FTO)导电玻璃上制备出球形花状ZnO微-纳米分级结构,利用SEM、XRD、PL等手段对球形微-纳米结构的形貌、成分和发光性能进行了分析。分析结果表明,球形花状六方纤锌矿ZnO微-纳米分级结构具有表面多孔特征,有利于染料的吸收。球形花状ZnO微-纳米结构存在近带边发射的近紫外发光(402nm)和来自于深能级缺陷的可见发光(460nm和500nm)。将所制备的样品作为光阳极组装成染料敏化太阳能电池(DSSC),该电池的转换效率η=0.67%,比以纳米棒、树枝状纳米结构、纳米梳作为光阳极材料的DSSC的转换效率要高,但是整体转换效率不高,这是由于晶体内部较多缺陷引起的。
In this paper,a spherical flower-like ZnO micro-nano hierarchical structure was successfully grown via thermal evaporation method on F-doped SnO2（FTO） conductive glass coated with Zn.The morphology,composition and luminescence properties of the spherical micro-nano hierarchical structure were characterized by field emission scanning electron microscopy（FESEM）,powder X-ray diffraction（XRD） and photoluminescence spectroscopy（PL） respectively.The results reveal that the spherical flower-like wurtzite ZnO micro-nano hierarchical structure is of porous surface which enhances the dye absorbing.The PL measurement exhibits that the as-synthesized products have near-UV emission peaks of 402 nm and visible emission peaks of 460 nm and 500 nm due to near band-edge emission and deep level defects respectively.Dye-sensitized solar cells（DSSC） were assembled by using the ZnO as anode material.A conversion efficiency η=0.67% was obtained,which was higher than those of nanorods,nanobranches and nanocombs based anode materials.However the deep level defects and porous surface influenced the final conversion efficiency.
出处
《合肥工业大学学报（自然科学版）》
CAS
CSCD
北大核心
2012年第3期294-298,共5页
Journal of Hefei University of Technology：Natural Science
基金
国家自然科学基金资助项目(21071039)
