Probing Photoinduced Halide Segregation in CH3NH3Pb(BrxI1–x)3 Perovskites via in Situ Nuclear Quadrupole Resonance Spectroscopy - Andrea Scarperi; Noemi Landi; Marcello Costamagna; Marco Taddei; Elisa Carignani; Marco Geppi; Silvia Borsacchi (Journal of the American Chemical Society, 2025)