Effect of temperature on the performance of Cesium formamidinium lead mixed halide perovskite solar cells

For the practical application of the Cesium formamidinium lead mixed halide (FA0.83Cs0·17PbI3-xBrx) perovskite solar cells, the impact of the operating temperature (T) on the solar cell performance parameters (Jsc, Voc, fill factor FF, and η) was investigated using SCAPS-1D simulation. The Br content varied from 0.5 to 2.5. The Jsc increased linearly with a rise in T, but on contrary, the Voc decreased linearly. Though the temperature coefficient of Jsc was enhanced with the rise of Br content. The lowest temperature coefficient of Voc was obtained for x = 2.5 for the cell of the two defect layers. The cells with a Br content of 0.5 shows the highest degradation due to Voc loss. The η of the cell without defect and with one defect layer slightly improved with rising the temperature to 400 K. This study suggests that the selection of the absorbing layer enormously depends on environmental conditions.