Electrically Sorted Single-Walled Carbon Nanotubes-Based Electron Transporting Layers for Perovskite Solar Cells

？ PSCs based on ETLs containing separated families of SWCNTs are fabricated ？ Nanotube compositions are precisely tuned to enable the highest PCE ？ By optimizing the nanotube ratio, an efficiency of 19.35% is obtained ？ Elucidation of the optimal ratio of s-SWCNTs vs. m-SWCNTs for charge transport electrode