Vacancies substitution induced interfacial dipole formation and defect passivation for highly stable perovskite solar cells
Chemical Engineering Journal（2020）
Abstract
•1-butyl-3-methylimidazolium tetrafluoroborate is used to form an interfacial dipole layer.•Interfacial dipole layer decreases the surface potential of electron transport layers.•Triphenylphosphine oxide passivated the defects of perovskite films.•Power conversion efficiency of PSCs is improved from 18.7% to 21.1%
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Key words
Perovskite solar cells,[BMIM]BF4,Charge transfer,Triphenylphosphine oxide,Vacancies substitution
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