System approach to the analysis of solar cell efficiency: mesostructured perovskite solar cell

A method for analyzing the photocell efficiency is proposed, based on the procedure of statistical averaging of experimental data. The method enables an assessment of the overall quality of the device and to determine the conditions for increasing its efficiency by optimizing the functional layers thicknesses. By means of the developed approach, the characteristics of the functional layers of the experimental perovskite solar cell with a mesoporous TiO$_2$ layer were established, and the excellent agreement between the theoretical and experimental values of the current-voltage characteristics was obtained.