Research on the Effect of Aging Process on the Performance of MAPbBr3 Perovskite Solar Cells
Device aging under oxygen atmosphere has a significant impact on the performance of perovskite photovoltaic cells.This article investigates the performance of brominated lead methylamine(MAPbBr3)batteries assembled by solution method,with dense and mesoporous TiO2 as the electron transport layer and Spiro OMeTAD as the hole transport layer.The MAPbBr3 perovskite cell is placed in an oxygen atmosphere dark condition with a humidity of<10%for different times to explore the influence of O2 on the passivation of perovskite film defects,and the transient photovoltage(TPV)technology is used to analyze the ion migration of the device before and after aging under different illumination times.The results show that after aging treatment,the performance of devices based on MAPbBr3 has been significantly improved,and the photoelectric conversion efficiency increases from 4.18%to 6.73%.This reason may be attributed to the decrease in defect density of perovskite materials,as under dark conditions,O2 diffuses in MAPbBr3 perovskite solar cells,thereby passivating defects.
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