Fig. 3: Automated fabrication of 1600 PeSCs in one experiment.

a The custom-built R2R SD coater used for the fabrication of thousands of unique solar cells in a day. b The custom-built automatic solar tester with a daily throughput of over 10,000 cells. c Schematic illustration of the automatic testing setup. d–h An example of a high-throughput R2R experiment to screen deposition parameters of the perovskite layer of PeSCs with a configuration: flexible TCE/SnO2/FA0.45MA0.55PbI3/PPDT2FBT/carbon electrode. Statistical (d) PCE, (e) Jsc, (f) FF, and (g) open-circuit voltage (Voc) of 80 devices (along 44 cm substrate for each condition) for 20 different deposition parameter combinations of PbI2 with 45 mol% FAI and MAI solutions. (centre line, median; diamond, mean; box limits, upper and lower quartiles; whiskers, 1.5× interquartile range; linecross, outliers) (h) PCE of 1600 consecutively fabricated PeSCs and deposition parameters along the position of the flexible film. Red dashed lines indicate the MAI amount that is nearest to the theoretical stoichiometric amount. The error bars in the box charts represent 1.5 times the interquartile range. Source data are provided with this paper.