摘要
文章采用水热/溶剂热法分别合成一维ZnO纳米线阵列及均匀SnO2纳米颗粒,再通过旋涂法合成了ZnO纳米线/SnO2纳米颗粒核壳复合纳米结构。在染料敏化太阳能电池(DSSCs)中,与单一结构的ZnO纳米阵列或SnO2纳米颗粒光阳极相比,所合成的新型复合纳米结构的光阳极能有效地提高光电性能,短路电流、开路电压及转化效率分别为2.93mA/cm2、0.64V、0.74%。入射光光电转换效率(IPCE)、强度调制光电流谱(IMPS)及强度调制光电压谱(IMVS)的测试结果表明:SnO2纳米颗粒包裹层能增加比表面积,有利于染料的吸附;能有效地抑制ZnO与电解液界面的电子复合,提高了电子寿命。
In this paper,the one-dimensional ZnO nanowire and uniform SnO2 nanoparticle were synthesized by hydrothermal/solvothermal method respectively,and then ZnO nanowire/SnO2nanoparticle（ZnO NW/SnO2NP）core-shell composite electrode was synthesized by spin coating method.The integration of such nanocomposite photoanodes in dye-sensitized solar cells（DSSCs）leads to much better photovoltaic properties than bare ZnO NW or SnO2 NP with the short-circuit photocurrent（Jsc）,the open-circuit photovoltage（Voc）and the photo conversion efficiency as high as 2.93mA/cm^2,0.64 Vand 0.74%,respectively.By the characterization of the incident photon-to-electron conversion efficiency（IPCE）and intensity-modulated photocurrent/photovoltage spectroscopy（IMPS/IMVS）,it is shown that on the one hand,the coated layer SnO2 NP exhibits a high specific surface area leading to an increase of dye adsorbate;on the other hand,the formation of an energy barrier on the ZnO NW can reduce the rate of electron recombination at the ZnO/electrolyte interface and prolong the electron lifetime.
出处
《合肥工业大学学报（自然科学版）》
CAS
CSCD
北大核心
2015年第1期29-33,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)
作者简介
赵天（1989-），女，安徽合肥人，合肥工业大学硕士生；
陈翌庆（1963-），男，安徽芜湖人，博士，合肥工业大学教授，博士生导师
