Minimizing the buried interfacial energy loss using a fluorine-substituted small molecule for 25.92%-efficiency and stable inverted perovskite solar cells

Abstract

Tetrafluorosuccinic acid was introduced into the buried interface to stabilize FA cations, mediate crystal growth of perovskite and reduce the hole-transport barrier, delivering a record efficiency of 25.92% for RbCsFAMA-based perovskite solar cells.