Simulations of Photoluminescence Transients in Perovskite Solar Cells

Abstract

Perovskite solar cell technology has attracted enormous interest and attention from the research community in recent decades as one of the most promising photovoltaic technologies for future energy generation. This attention is partly due to the continuous increase in the power conversion efficiency of perovskite solar cells, which is approaching that of crystalline silicon technology, the ease of processing the materials, the availability of materials, and the low cost of manufacturing processes. However, the performance of perovskite solar cells is hampered by some charge carrier mechanisms and loss processes within the solar cell, thus hindering the large-scale development of perovskite solar cells. This work aims to simulate photoluminescence transients in complete perovskite solar cells to understand and gain insight into charge carrier dynamics in perovskite solar cells and different recombination mechanisms, as well as the effects of some material parameters on photoluminescence transients. Therefore, numerical simulations were carried out on a complete perovskite solar cell after excitation by a laser pulse by applying some key assumptions to the proposed model. The thesis explores the approach of a numerical model based on time-dependent derivative triple-coupled ordinary differential equations describing the kinetics of carriers within a complete perovskite solar cell using MATLAB software. To verify the reliability and accuracy of the numerical approach proposed in this work, experimental measurements of transient photoluminescence from a fabricated complete perovskite solar cell were performed. The results were compared with the SETFOS software to determine the correlation between experimental data and simulations.