Gharibzadeh, S., Fassl, P., Hossain, I. M., Rohrbeck, P., Frericks, M., Schmidt, S., et al. (2021). Two birds with one stone: dual grain-boundary and interface passivation enables >22% efficient inverted methylammonium-free perovskite solar cells. Energy & Environmental Science, 14(11), 5875-5893. doi:10.1039/d1ee01508g.