Iodide-methylammonium interaction is responsible for ferroelectricity in CH3NH3PbI3

Joachim Breternitz, Frederike Lehmann, Sarah A. Barnett +2

Excellent conversion efficiencies of over 20 % and facile cell production have placed hybrid perovskites at the forefront of novel solar cell materials with CH3NH3PbI3 being its ar…