Photoinduced Cross Linkable Polymerization of Flexible Perovskite Solar Cells and Modules by Incorporating Benzyl Acrylate

摘要

Flexible perovskite solar cells possess huge application potential in bothoutdoor (sunlight) and indoor scenes (artificial low light) owing to theirhigh optoelectronic conversion efficiency and agile integration advantages.In order to further establish their feasibility to meet multi-scenario applications,here a facile “internal packaging” interface strategy is developed,where a selective light-cured cross-linking molecule is leveraged to effectivelyheal the interface defects over perovskite films. Moreover, the crosslinkedinterfacial layer can act as an airtight “protective wall”, preventingthe device from water and oxygen corrosion and lead leakage. The flexibledevices aided by this strategy show considerable performance rangingfrom small size to scalable modules (20.86%-0.07 cm~2, 16.75%-24 cm~2).More importantly, the optimal devices yield excellent moisture resistance,light soaking resistance, and lead leakage prevention stability. Based onthe common light source environment of indoor scenes, the excellence offlexible modules (30.73% under white light-emitting diode (LED), 26.48%under yellow LED) is further validated. It is expected that this gentlestrategy can underline simultaneous promoting of the efficiency andstability of flexible perovskite modules, thereby accelerating the applicationof flexible perovskite in advanced industrial fields.