The Synthesis of 2D CH₃NH₃PbI₃ Perovskite Films with Tunable Bandgaps by Solution Deposition Route

Table 1

Absorption edge and bandgap of MAPb(I_1−xBr_x)₃ prepared from MAI+MABr precursor solution at various molar ratios.

MAI : MABr	Absorption edge (nm)	Bandgap (eV)
100 : 0 (w/o 5-AVAI)	793	1.56
100 : 0	793	1.56
75 : 25	780	1.59
50 : 50	601	2.06
25 : 75	574	2.17
0 : 100	510	2.43