钙钛矿太阳电池用NiO/石墨烯复合空穴传输材料

NiO/Graphene Composite Hole Transport Materials for Perovskite Solar Cells

有机-无机杂化钙钛矿太阳电池（PSC）因其效率高、成本低及制备工艺简单等优点而得到广泛的关注。采用无机材料替代有机空穴传输材料可以进一步降低电池成本,拓宽钙钛矿太阳电池空穴传输材料的选择范围。采用水热合成法制备了NiO/石墨烯复合材料前驱体,经过高温处理,得到NiO/石墨烯复合材料,并将其应用于钙钛矿太阳电池空穴传输层。通过X射线衍射仪（XRD）、扫描电子显微镜（SEM）和热重分析仪-差式扫描量热仪（TGA-DSC）等手段表征了复合材料组分及微观结构。同时,探索了复合材料质量浓度和制膜工艺对空穴传输层性能的影响。研究结果表明,当复合材料的氯苯溶液质量浓度为1.25 mg/mL时,采用喷涂工艺制膜得到的空穴传输层具有最优的性能,其相应钙钛矿太阳电池的光电转化效率为1.44%。NiO/石墨烯复合材料在钙钛矿太阳电池中表现出优于NiO和石墨烯的性能,体现了NiO和石墨烯在复合材料空穴输运过程中的协同作用。

The organic-inorganic hybrid perovskite solar cell（PSC）attracts wide attention because of its high efficiency,low cost,simple preparation process and other advantages.Substituting the organic hole transport materials with inorganic materials can further reduce the cost and expand the selection range of hole transport materials of the PSCs.NiO/graphene composite precursors were prepared by the hydrothermal synthesis method.Then the NiO/graphene composite materials were obtained by the high temperature treatment,and were applied as the hole transport layer in the perovskite solar cell.The component and microstructure of the composite materials were characterized by using the X-ray diffractometer（XRD）,scanning electron microscope（SEM）,thermal gravimetric analyzer-differential scanning calorimeter（TGA-DSC）and other methods.Additionally,the influences of the composite material mass concentration and film preparation process on the performance of the hole transport layer were investigated.The research result shows that the performance of the hole transport layer prepared by the spray coating process is optimum with the composite materials chlorobenzene solution mass concentration of1.25 mg/mL,and the photoelectric conversion efficiency of the corresponding PSC is 1.44%.NiO/graphene composite materials exhibit better performance than single NiO or single graphene in the PSC,reflecting the synergistic effect of NiO and graphene in the hole transport process of the composite materials.