Abstract
In this simulation work, we investigate the performance of perovskite solar cell (PSC) as a function of different layers thickness of the used structure. Our simulated structure consists in methylammonium mixed bromide-iodide lead perovskite, CH3NH3PbI3−xBrx (0 ≤ x ≤ 1). This absorber layer is sandwiched between TiO2 and Spiro-OMeTAD layers. The objective of this work is to improve the power conversion efficiency (PCE) by modifying the thicknesses of each layer. A good agreement between our simulation results and the experimental data taken from literature has been achieved. The results show optimal PCE of 20.35%, this maximum power conversion efficiency is achieved with thickness values of 100 nm, 100 nm and 400 nm for TiO2, Spiro-OMeTAD and perovskite layers, respectively. In addition to the previous improvement, we have also enhanced the power conversion efficiency to 24.72% by considering a longer carrier lifetime (10−6s) in the absorber region. The numerical simulation was performed using Silvaco TCAD software.
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