High performance perovskite solar cells using TiO2 nanospindles as ultrathin mesoporous layer

摘要

cqvip:Single crystal anatase TiO_2 nanospindles(NSs) with highly exposed {101} facets were synthesized and employed as electron transport materials(ETMs) in perovskite solar cells(PSCs). Time-resolved photoluminescence(TRPL) spectra revealed that the TiO_2 NSs are more effective than TiO_2 nanoparticles in accepting electrons from perovskite. Moreover, the TiO_2 nanospindles further endowed the PSCs with good reproducibility and suppressed hysteresis. The best device with TiO_2 NSs as ETMs yielded power conversion efficiency(PCE) of 19.6%, demonstrating that the home-made TiO_2 NSs is a good ETM for PSCs.