Fig. 1: Faster PCE decay and cycled lattice strain in the cycling mode.
From: Strain regulation retards natural operation decay of perovskite solar cells
a, Stability of the pero-SCs based on FAPbI3 working in the continuous and cycling modes. The purple line represents the average value for each cycling mode with illumination time. b, Stability of the pero-SCs based on FAPbI3 working in the continuous and cycling modes. The temperature of the device was fixed at room temperature (RT; about 25 °C). c, Stability of the pero-SCs based on FAPbI3 working in the continuous thermal and cycled thermal (12 h at room temperature and 12 h at about 55 °C) ageing modes. Error bars represent the standard deviation of five devices for each condition. d,e, Integrated profiles (out of plane) obtained from in situ GIWAXS maps for the FAPbI3 perovskite film deposited on a silicon wafer substrate. The film was illuminated for 0 to 90 min and measured at 30-min intervals for the two cycles (d, the first cycle; e, the second cycle), and the recovery spectra were obtained from the film kept in dark for 30 min. f, Evolution of the unit cell volume and the peak broadening parameters for the FAPbI3 samples during in situ GIWAXS measurements. r.u., relative units.
