Fig. 5: Solvent evolution tracking in the upper and lower layers.

Peak integral area of the GD-OES profiles of Fig. 4 of upper layer and lower layer at different annealing times. a CsFAPI. b CsFAP/KC. c CsFAPI/AKC. d RbCsFAPI. e RbCsFAPI/KIAC. f MAPI. g MAPI/Au_NPs. h FAPI. i FAPI/MACl. (Black dashed line: linear fit line of upper layer in stage-2; Red dashed line: linear fit line of lower layer in stage-2). Source data are provided as a Source Data file.