Figure 2.

Bragg-peak intensity fading curves for MAPbI₃ for pulsed (blue; also shown in Figure 1e) and thermionic (red) beams delivered at the same dose rate (0.001 e·Å^–2·s^–1). Fits to the data are for determining ΔI at 10 e·Å^–2, which here is −19.2% for the pulsed beam and −23.2% for the conventional thermionic beam (as indicated by the blue and red horizontal dot-dashed lines, respectively). The beam was spread over an area of 245 ± 3 μm² for both types. The pulsed beam consisted of 50.4 ± 1.0 e/p and f^–1 = 2 μs (i.e., a 500-kHz repetition rate).