The Two Additives Synergistically Regulate the Growth of Perovskite Crystals
Rubidium chloride(RbCl)and methylenediamine dihydrochloride(MDACl2)were added to the PbI2 precursor solution to regulate the growth of perovskite crystals,and methyl sulfide(FA)and methylamine(MA)-based perovskite films and perovskite solar cells(PSCs)were prepared,and the synergistic mechanism between the two additives was explored.It was found that RbCl could react with PbI2 to form inert(PbI2)2RbCl compounds,which stabilized the crystal phase of perovskite.MDACl2 enhances crystallization orientation and stabilizes the crystal phase of perovskite.In addition,the synergistic regulation of these two additives increases the grain size,reduces grain boundaries,reduces film defect density,and extends carrier life to more than 7 times.The optimized cell has a maximum efficiency of 23.76%,a hysteresis factor as low as 0.6%,and a perovskite solar module(PSMs)with a pore area of 12.6 cm2 with an efficiency of 21.47%.
perovskite solar cellsadditiveregulate crystal growthhigh efficiency
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维普
