All-inorganic 2D/3D Csx+2Pbx+1(SCN)2(I/Br)3x+2 perovskites

Inorganic 2D/3D perovskites Cs x +2 Pb x +1 (SCN) 2 (I/Br) 3 x +2 ( x = 0, 1, 2, 3, ∞) only consist of 2D Cs 2 Pb(SCN) 2 (I/Br) 2 and 3D CsPb(I/Br) 3 perovskite phases.