Predicting the Open Circuit Voltage of CH3NH3PbI3 Perovskite Solar Cells Using Electroluminescence and Photovoltaic Quantum Efficiency Spectra: the Role of Radiative and Non Radiative Recombination
The remarkably high open circuit voltage of methylammonium lead iodide perovskite solar cells is investigated. Both the theoretical maximum and the real open circuit voltage are predicted from electroluminescence and photovoltaic external quantum efficiency spectra. Radiative and non radiative recombination are quantified, where a source of non radiative recombination is found in the mesoscopic structure, independent of the Al2O3 or TiO2 scaffold. Without a hole transport layer, non radiative recombination is strongly enhanced, which reduces the open circuit voltage. (c) 2014 WILEY VCH Verlag GmbH Co. KGaA, Weinheim.