A multifunctional chemical linker in a buried interface for stable and efficient planar perovskite solar cells

Abstract

The buried interface between perovskite light absorbing layer (PVK) and electron transport layer (ETL) plays an utmost important role for further improving the efficiency and stability of planar perovskite solar...

High-Efficiency CsPbI2Br Perovskite Solar Cells with over 83% Fill Factor by Synergistic Effects of a Multifunctional Additive

“…Figure S10 shows the ultraviolet photoemission spectroscopy (UPS) data of the initial and optimized CsPbI 2 Br films. Combined with our previous results, 45 Figure S11 further shows the schematic arrangement of the energy levels of each functional layer in the complete device. The valence band maximum (VBM) of the optimized CsPbI 2 Br film is increased from the initial −5.57 to −5.46 eV, thus better matching the highest occupied molecular orbital (HOMO) of the upper hole transport layer (HTL), which means less energy loss in hole transfer from the light-absorbing layer to the HTL.…”