Study of the stability of Rb-doped Cs2SnI6 and CsSnI3

All-inorganic halide perovskites are promising materials for optoelectronic applications such as solar cells or LEDs. These materials have a high thermal stability and excellent optoelectronic properties, with easily tuneable band gaps. We are interested in studying the stability and the behaviour with temperature of the different compositions of Cs2-xRbxSnI6 and Cs1-yRbySnI3. These materials will be obtained via mechanochemistry, a simple and eco-friendly synthetic method. We are interested in collecting data from room temperature (RT) to 350ºC and back to RT as well as studying the stability and decomposition of the Cs1-yRbySnI3. We will study the phase transformations that the material undergoes with temperature and the decomposition paths of the perovskite into the vacancy ordered perovskite. We will analyse the data performing Rietveld refinements and maximum entropy analysis (MEM).