From soft harmonic phonons to fast relaxational dynamics in CH${}_3$NH${}_3$PbBr${}_3$

I. P. Swainson, C. Stock, S. F. Parker +3

The lead-halide perovskites, including CH${}_3$NH${}_3$PbBr${}_3$, are components in cost effective, highly efficient photovoltaics, where the interactions of the molecular cations…