Here we demonstrate a room-temperature drop-coating method for MAPbI_(3) films.By using low-boiling-point solvent,high-quality MAPbI_(3) films were made by simply casting a drop of solution onto the substrate at room ...Here we demonstrate a room-temperature drop-coating method for MAPbI_(3) films.By using low-boiling-point solvent,high-quality MAPbI_(3) films were made by simply casting a drop of solution onto the substrate at room temperature.This approach took advantage of the synergistic effect of good wettability and volatility of the solvent,enabling high nuclei density and compact film at room temperature.The crystal growth in different solvents was in-situ observed by using optical microscope,which helped us to understand the mechanism for the formation of different film morphology.Perovskite solar cells gave a PCE of 18.21%.展开更多
基金We thank the National Key Research and Development Program of China(2017YFA0206600)the National Natural Science Foundation of China(51773045,21772030,51922032 and 21961160720)for financial support.
文摘Here we demonstrate a room-temperature drop-coating method for MAPbI_(3) films.By using low-boiling-point solvent,high-quality MAPbI_(3) films were made by simply casting a drop of solution onto the substrate at room temperature.This approach took advantage of the synergistic effect of good wettability and volatility of the solvent,enabling high nuclei density and compact film at room temperature.The crystal growth in different solvents was in-situ observed by using optical microscope,which helped us to understand the mechanism for the formation of different film morphology.Perovskite solar cells gave a PCE of 18.21%.
