File Name : fig. s1.tif

Caption : fig. s1 optical microscope images of mapbcl3 perovskite (a) and avax(mapbcl3) perovskites with x=0.125 (b), x=0.25 (c), x=1(d) and x=2 (e).


File Name : fig. s2.tif

Caption : fig. s2 crystal structure (a), xrd (b), sem image (c) and afm image (d) of (ava)2pbcl4 perovskites.


File Name : fig. s3.tif

Caption : fig. s3 absorption (a) and emission (b) spectra of (ava)2pbcl4 perovskite. 


File Name : fig. s4.tif

Caption : fig. s4 stability tests. time-dependent xrd (a) and pl (b) of ava2(mapbcl3) perovskites under ambient conditions.