In this contribution we give an overview of the recent development of metal-halide perovskite solar cells. We focus on the mixed electronic-ionic conductivity of this material, which causes hysteresis in the current-voltage curve. We discuss latest results on recombination obtained by electroluminescence measurements. We report on high luminescence yields (1%) and open-circuit voltages larger than 1.2 V, which are exceptional for a material with a bandgap of 1.6 eV and yield to efficiencies >21%. We identify the efficiency limiting processes and propose measures to overcome those.
Michael Graetzel, Shaik Mohammed Zakeeruddin, Felix Thomas Eickemeyer, Peng Wang, Ming Ren
Beat Ruhstaller, Urs Aeberhard
Shaik Mohammed Zakeeruddin, Felix Thomas Eickemeyer, Jovana Milic, Hong Zhang, Masaud Hassan S Almalki, Marco Alejandro Ruiz Preciado