Metal Halide - Astrophysics Data System

The Validity Window of Space-Charge-Limited Current Measurements of Metal Halide Perovskite Devices

By examining the current density-voltage relationship for unipolar devices predicted by the Mott-Gurney law, space-charge-limited latest measurements can be used to calculate charge carrier mobilities and electronic trap densities of semiconductors. To determine the MG's law for testing both the standard and new protocol JV results, we used drift-diffusion simulations with mobile ions here. We simulated idealised perovskite units with different cell densities and compared them to simulations and measurements of devices with common contact materials. We found that the validity zone for the MG regulation is limited to perovskites with mobile ion densities lower than the device's equilibrium charge carrier density and contacts with injection/extraction barriers =0. 1 eV. Our findings show that extracting meaningful and accurate measurements for metal halide perovskite material properties from SCLC can be difficult, or not possible.

Source link: https://ui.adsabs.harvard.edu/abs/2022arXiv220400459F/abstract

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