Steady-State Transporting Properties of Halide Perovskite Thin Films under 1 sun through Photo-Hall Effect Measurement

The transient properties of photogenerated carriers using a pulsed laser have been widely used to observe carrier characteristics of perovskite solar cells (PSCs). However, these transient results could not reveal a steady-state operation performance of the PSCs under continuous illumination. Thus, an evaluation of the transporting parameters for perovskite thin films (PTFs) under continuous illumination is needed to understand the operation performance of solar cells. Here, we report that the steady-state transport parameters for the PTF can be extracted through photo-Hall effect measurement (PHEM) by solving the signal uncertainty. We observed that the interaction of atmospheric gas molecules with the PTF causes the uncertainty of opto-electrical results. The uncertainty of signals was overcome by designing a Hall specimen and controlling the surface of the PTF. We characterized two types of PTFs featuring distinct efficiency differences and successfully extracted their transporting parameters in the near-l-sun conditions through the PHEM.