Current-voltage characteristics of hysteresis-free planar perovskite solar cells explained by analytical modeling

M. SOLDERA; K. TARETTO

Varsovia

Conferencia; 2016 E-MRS Fall Meeting and Exhibition; 2016

European Materials Research Society

Current perovskite solar cells reach high efficiencies with inexpensive materials and preparation methods. In order to understand and surpass the efficiency beyondcurrent values, the fundamental loss mechanisms of perovskite solar cells must be understood and predicted by appropriate models. Here, we adapt an analytical, drift-diffusion model for p-i-n solar cells and fit measured current voltage characteristics of planar hysteresis-free perovskite solar cells using different hole-transport layers. Our results give values of carrier recombination lifetimes higher than 0.5 μs, low effective recombination velocities at the interfaces between the perovskite layer and the surrounding layers, which are below 1000 cm/s, and carrier mobilities around 0.1 cm2/Vs, considerably lower than values obtained in perovskite single crystals. These first results are discussed and compared with literature values obtained by direct measurements performed on perovskite films.