Qu et al. report a self-assembled material with π-expanded conjugation to form hydrophilic ordered bilayer as hole selective layer for inverted perovskite solar cells. The enhanced interfacial charge extraction and transport enable certified efficiency of 26.39% and 25.21% for 7.15 mm2 - and 99.12 mm2 -devices, respectively.
- Geping Qu
- Letian Zhang
- Zong-Xiang Xu
