Bilateral Anchoring Strategy Enables Highly Efficient Wide‐Bandgap Perovskite Solar Cells/Modules for Self‐Powered Photo‐Electrocatalytic Antibacterial System

ABSTRACT Integrating solar‐driven photovoltaics (PVs) with photo‐electrocatalytic (PEC) antibacterial systems presents a sustainable and efficient technology that operates entirely on renewable energy. Herein, we report a high‐performance, self‐powered PV‐PEC system enabled by wide‐bandgap (WBG) perovskite solar cells/modules (PSCs/PSMs). Specifically, 3‐Fluoro‐L‐Phenylalanine (3‐FLPA) is introduced as a molecular bridge in the n‐i‐p based perovskite devices. The carboxyl groups (–COOH) in 3‐FLPA anchor to oxygen vacancies on the SnO 2 surface, while the protruding amine (─NH 2 ) and fluorine (─F) substituents extend into the perovskite lattice, effectively passivating defects and suppressing the photo‐induced phase segregation in WBG PSCs. As a result, WBG PSCs and PSMs achieve impressive power conversion efficiencies of 20.43 % and 15.03 % under AM 1.5G irradiation, respectively, which increase to 41.57 % and 29.46 % under indoor lighting (1000 lux). Driven by the PSM, the WSe 2 @WO 3 heterojunction photoanode exhibits enhanced charge separation and reactive oxygen species generation, leading to efficient bacterial membrane disruption and enzyme inactivation. The integrated PSM‐PEC system achieves complete inactivation of E. coli within 16 min under sunlight and 65 min under indoor lighting. These findings highlight the potential of WBG PSCs/PSMs for all‐weather self‐powered sterilization technologies.