Maximizing and stabilizing luminescence from halide perovskites with potassium passivation

Mojtaba Abdi‐Jalebi, Zahra Andaji‐Garmaroudi, Stéfania Cacovich, Camille Stavrakas, Bertrand Philippe, Johannes M. Richter, Mejd Alsari, Edward P. Booker, Eline M. Hutter, Andrew J. Pearson, Samuele Lilliu, Tom J. Savenije, Håkan Rensmo, Giorgio Divitini, Caterina Ducati, Richard H. Friend, Samuel D. Stranks