Hybrid perovskites are very promising solution-processed solar cell materials. In order to understand these materials and devices made from them it is important to develop reliable measurements of charge diffusion length and charge transfer rates at the interface with charge selective contacts.<br/><br/>We show that time-resolved photoluminescence measurements of hybrid perovskites on a charge extraction layer can enable both both diffusion and charge transfer to be determined by making measurements by illuminating from each side of the sample.<br/><br/>We show the results of such measurements of electron and hole diffusion and how they can also be used to identify the most suitable charge extraction layers. Furthermore we show that charge transport In perovskites is sensitive to excitation density and make measurements at intensities close to solar excitation.

Measurement of charge diffusion and charge extraction in hybrid perovskites by surface quenching

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