Laser Processing of KBr‐Modified SnO₂ for Efficient Rigid and Flexible Ambient‐Processed Perovskite Solar Cells

A combination of KBr modification and laser processing is utilized to prepare SnO 2 films for rigid flexible perovskite solar cells (PSCs). The effectively passivates the defects at interface between as well grain boundaries film. power conversion efficiency (PCE) 20.14% achieved with KBr‐modified PSCs fabricated under a relative humidity around 65–75%, compared pristine PCE 18.66%. Then, picosecond ultraviolet employed process on substrates rapid scanning rate 100 mm s −1 . improves PCEs durability PSCs. by remain over 80% their initial after 1000 bending cycles, higher than those hot plate showing 40% same cycles.