| 초록 |
For commercializing perovskite solar cells (PSCs), moisture-tolerant materials are required on an actual production line. Recently, PSCs using Li-doped TiO2 with efficiency exceeding 22 % have reported, but the use of Li can negatively influence device stability during the fabrication process under humid air. In this study, we report a strategy for improving processing stability by employing a BaSnO3 (BSO) mesoporous layer as an ETL. Using the BSO mesoporous layer, we achieved a certified efficiency of 21.3 %. The BSO-based PSCs also exhibit better processing stability than Li-doped TiO2 based PSCs under humid air. The reason for the inferior processing stability of Li-doped TiO2 is systematically revealed through various analyses. Additionally, BSO based PSCs show excellent storage and light stability during 500 hours. We believe that this strategy of introducing BSO mesoporous into PSCs will accelerate the commercialization of PSCs. |
