Simulation of Efficient Perovskite Solar Cells*

While Perovskite popularity has sky-rocketed since the efficiency reached 22% in 2018, there is still ample research to be done as to what characteristics and parameters affect the solar cell. In order to obtain a greater understanding of the mechanics of how a perovskite cell becomes more efficient, this project focuses on the simulation program wvAMPS and how parameters alter main characteristics such as Voc (open circuit voltage) and Jsc (short circuit current). The perovskite solar cells were obtained from National Renewable Energy Laboratory. The structure of the solar cell is Ag(120nm)orAu(100nm)/spiro-OMeTAD(180-200nm)/perovskite(550nm)/mesoporous-TiO_2(200nm)/compact-TiO₂(40-60nm)/FTO/glass. The measured solar cell parameters are: Voc = 1.06V, Jsc = 16.53 mA/cm^2 , Fill Factor = 63.5% and Efficiency = 11.2%.
The simulation attempted to parallel the measured Perovskite solar cell. With given parameters, we were able to simulate a solar cell with a Voc = 0.93V, Jsc = 21.27 mA/cm^2 , Fill Factor = 85.5% and Efficiency = 16.9%, which are very close to the measured parameters. We also varied the layer thickness to check how the device performance can be improved. These results will help determine how to optimize device structures for Perovskite solar cells.