Investigation of earth-alkaline (EA = Mg, Ca, Sr) containing methylammonium tin iodide perovskite systems

Methylammonium tin iodide systems containing earth-alkaline ions (CH 3 NH 3 Sn 1− x (EA) x I 3 , EA = Ca 2+ , Sr 2+ , Mg 2+ , 0 ≤  x  ≤ 0.30) were investigated. The X-ray diffraction patterns detected the formation of tetragonal nearly cubic CH 3 NH 3 SnI 3 (space group P4mm ), SnI 2 , and not ident...

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