Abstract

AbstractFlexible perovskite solar cells possess huge application potential in both outdoor (sunlight) and indoor scenes (artificial low light) owing to their high 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 effectively heal the interface defects over perovskite films. Moreover, the cross‐linked interfacial layer can act as an airtight “protective wall”, preventing the device from water and oxygen corrosion and lead leakage. The flexible devices aided by this strategy show considerable performance ranging from small size to scalable modules (20.86%‐0.07 cm2, 16.75%‐24 cm2). More importantly, the optimal devices yield excellent moisture resistance, light soaking resistance, and lead leakage prevention stability. Based on the common light source environment of indoor scenes, the excellence of flexible modules (30.73% under white light‐emitting diode (LED), 26.48% under yellow LED) is further validated. It is expected that this gentle strategy can underline simultaneous promoting of the efficiency and stability of flexible perovskite modules, thereby accelerating the application of flexible perovskite in advanced industrial fields.

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