Foldable Solar Cells: Foldable Perovskite Solar Cells Using Carbon Nanotube‐Embedded Ultrathin Polyimide Conductor (Adv. Sci. 7/2021)

In article number 2004092, Shigeo Maruyama, Phillip Lee, Il Jeon, and co‐workers report carbon nanotube‐embedded ultra‐thin polyimide conductor‐based foldable perovskite solar cells. The foldable photovoltaic device exhibits 15.2% of power output and withstands 10 000 cycles of folding test at a bending radius of 0.5 mm. Such high efficiency and mechanical robustness are attributed to 7‐µm‐thin and smooth carbon nanotube‐polyimide complex film, which also induces strong and stable MoOx doping.