Fig. 4: 2D plots for high-throughput TA spectroscopy on spin-coated films from six gradient sequences of perovskite-inspired materials.

The TA signal was collected as fast as possible (5 mins per sample) without scan repetitions and data averaging. In total, 58 TA spectra were obtained with a 10% compositional increment in each sequence. Bicubic interpolation smoothing was performed to obtain the TA mapping results in a–c and g–i. The normalized changes in transmission at 1–10 ps were plotted against photon energy for d–f and j–l.