Low-temperature structural instabilities of the halide double perovskite Cs${}_2$AgBiBr${}_6$ investigated via x-ray diffraction and infrared phonons

Collin Tower, Fereidoon S. Razavi, Jeremy Dion +3

The halide double perovskite Cs${}_2$AgBiBr${}_6$ has been proposed as a potential replacement for organic halide perovskites for photovoltaic applications. Further investigation of it…