中文摘要：

纳米TiO_2由于具有合适的禁带宽度、良好的光电化学稳定性、制作工艺简单等特点,目前广泛应用于染料敏化、量子点和钙钛矿等太阳电池中。作为电池的重要组成部分之一,纳米TiO_2晶体尺寸、颗粒大小和制备方法等明显影响电池的光伏性能,相关研究工作一直是染料敏化、量子点和钙钛矿等太阳电池方面的重点。本文综述了纳米TiO_2作为致密层和骨架层在钙钛矿太阳电池中的应用研究进展,主要讨论了纳米TiO_2的不同形貌、制备方法以及结构等对电池光电性能的影响,并针对纳米Ti O2在后续对电池性能提升方面进行了展望。

英文摘要：

TiO_2 is widely used in photovoltaic field like dye-sensitized solar cells,quantum dot-sensitized solar cells and so on because of its proper forbidden band width,good optical and chemical stability,nontoxicity,corrosion resistance and simple manufacturing process etc.Recently,inorganic-organic hybrid perovskite solar cell has attracted great attention as a new class of photovoltaic devices and its rapid development has led the power conversion efficiency up to 20%.TiO_2 nanomaterial appears to be a good candidate to be applied in it,which is usually used as compact layer or skeleton layer in perovskite solar cells.As an important part,its crystalline phase,particle size,morphology,preparation methods,film thickness and coverage have great influence on the performance of solar cells.This paper summarizes recent progress of titanium dioxide in the application of perovskite solar cells.We introduce the role TiO_2 play in constructing perovskite solar cells and discuss different preparation methods（high/low temperature） and various optimization methods（modulation of structure,size,shape and interface interaction） of TiO_2.What＇s more,we analyze the influence of these differences on the performance of perovskite solar cells.In the end,further optimization of TiO_2 materials in the applications of perovskite solar cells is also prospected.