钙钛矿太阳能电池常用二氧化钛做为电子传输层，其制备需要高温处理，不利于电池的柔性化。本项目拟使用富勒烯衍生物做为电子传输层，不需要高温处理，可以制备得到柔性的钙钛矿太阳能电池。针对钙钛矿太阳能电池电子传输层问题，本项目重点研究二氢化萘加成富勒烯衍生物做为电子传输层对钙钛矿太阳能电池性能的影响，通过对富勒烯进行特定的化学修饰，调控其能级结构、溶解度、电子迁移率和光谱吸收性质，研究不同种类富勒烯电子传输层对钙钛矿太阳能电池器件性能的影响，揭示富勒烯衍生物能级结构、溶解度、电子迁移率和光谱吸收性质对电荷分离、传输和光子吸收的影响规律，为设计高效的电子传输材料提供思路。进一步以富勒烯衍生物为电子传输层，在柔性基底上制备得到柔性的钙钛矿太阳能电池器件。

Most of perovskite solar cells utilize titanium dioxide as the electron transport layers. Titanium dioxide require sintering at high temperature prior to use, which renders them incompatible with flexible substrates. This proposal will focus on the syntheses and application of novel fullerene derivatives as electron transport layers for perovskite solar cells. Here, we will synthesize different fullerene derivatives with different energy level, solubility, electron mobility and spectral absorption property, which will be used as electron transport layer in perovskite solar cells. The current study will provide the fullerene molecular structure−device performance relationship, and suggest a design rule for high performance electron transport layers for Perovskite solar cells. Moreover, we will explore the use of the fullerene electron transport layers in flexible perovskite solar cells.