Carbonaceous microspheres templates were prepared by hydrothermal process using sucrose solution.Zn2+ precursor was absorbed onto surface of carbonaceous microspheres due to affinity of the microspheres,and ZnO core/shell hollow microspheres (CSHMS) were successfully prepared by controlling heating rate of 2℃/min during the subsequent annealing process.The structure,composition and formation mechanism of ZnO CSHMS were analyzed based on results of scanning electron microscope (SEM),transmission electron microscope (TEM),energy dispersive spectrum (EDS),and infrared spectrum (FT-IR).The influence of ZnO CSHMS on photovoltaic performance of CdSe/CdS quantum dots sensitized solar cell (QDSSC) was further investigated.In comparison with ZnO hollow microspheres (HMS),the application of ZnO CSHMS can improve short-circuit current density (Jsc) from 5.03mA/cm2 to 8.47mA/cm2,the power conversion efficiency reached 2.10%,which increased by nearly one time compared with QDSSC based on ZnO HMS.The incident photon-to-current conversion efficiency (IPCE) and corresponding integrated Jsc analysis were conducted to prove that ZnO CSHMS could enhance light harvesting efficiency in terms of quantum dots adsorption and light pathways,leading to the increase of Jsc,and finally improving the photovoltaic performance of QDSSC.
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基金资助
国家自然科学基金地区基金项目(51862007);甘肃省青年科技基金计划项目(18JR3RG210);甘肃省高等学校创新能力提升项目(2018A-091、2019A-106);河西学院第十批大学生科技创新项目(132)
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