Characterization of morphology-dependent transport in lead-halide perovskite printed films using time-resolved terahertz spectroscopy

We report on position-dependent measurements of photocarrier transport using time-resolved terahertz spectroscopy (TRTS) across a slot-die printed perovskite film of varying morphology. Using the Drude-Smith model for the photoconductivity spectra we report maximum intrinsic mobilities of $540 \pm 20$ ${\mathrm {cm}}^{2} {\mathrm {V}}^{-1} {\mathrm {s}}^{-1}$. In addition, we measure variation across the film in the extracted mobilities and the localization c-parameter, correlated with complementary measurements of the film morphology and optical properties. To the best of our knowledge this is the first TRTS study performed on perovskite films produced using a slot-die printing technique.