Humidity‐Tolerant Roll‐to‐Roll Fabrication of Perovskite Solar Cells via Polymer‐Additive‐Assisted Hot Slot Die DepositionKim, Jueng‐Eun; Kim, Seok‐Soon; Zuo, Chuantian; Gao, Mei; Vak, Doojin; Kim, Dong‐Yu · Advanced Functional Materials · 2019