Data from: Enhancing the efficiency of planar heterojunction perovskite solar cells via interfacial engineering with 3-aminopropyl trimethoxy silane hydrolysate

The interfacial compatibility between compact TiO2 and perovskite layers is critical for the performance of planar heterojunction perovskite solar cells (PSCs). A compact TiO2 film employed as an electron-transport layer (ETL) was modified using 3-aminopropyl trimethoxy silane (APMS) hydrolysate. The power conversion efficiency (PCE) of PSCs composed of an APMS-hydrolysate-modified TiO2 layer increased from 13.45 to 15.79%, which was associated with a significant enhancement in the fill factor (FF) from 62.23 to 68.04%. The results indicate that APMS hydrolysate can enhance the wettability of γ-butyrolactone (GBL) on the TiO2 surface, form a perfect CH3NH3PbI3 film, and increase the recombination resistance at the interface. This work demonstrates a simple but efficient method to improve the TiO2/perovskite interface that can be greatly beneficial for developing high-performance PSCs.

致密TiO2与钙钛矿层之间的界面相容性，对平面异质结钙钛矿太阳能电池（planar heterojunction perovskite solar cells, PSCs）的性能至关重要。本研究采用3-氨基丙基三甲氧基硅烷（3-aminopropyl trimethoxy silane, APMS）水解产物，对作为电子传输层（electron-transport layer, ETL）的致密TiO2薄膜进行改性。经APMS水解产物改性TiO2层制备的PSCs，其光电转换效率（power conversion efficiency, PCE）从13.45%提升至15.79%，填充因子（fill factor, FF）也从62.23%显著提升至68.04%。研究结果显示，APMS水解产物可提升γ-丁内酯（γ-butyrolactone, GBL）在TiO2表面的润湿性，制备出高质量的CH3NH3PbI3薄膜，并提高界面处的复合电阻。本工作提出了一种简便高效的TiO2/钙钛矿界面改性策略，可为高性能PSCs的开发提供重要助力。