Sustainable Film With Phosphorus–Carbon Polymer Dots for Preservation Packaging via Solar‐Driven Photoporation Enhanced Sterilization

ABSTRACT Photodynamic inactivation (PDI) has emerged as a promising strategy to combat bacterial infections. However, the effectiveness of reactive oxygen species (ROS) is often hindered by the barrier function of bacterial membrane, limiting overall antibacterial efficacy. Inspired by nanoparticle‐sensitized photoporation, we integrated phosphorus‐modified carbonized polymer dots (PCD) into a konjac glucomannan (KGM) and carboxymethyl cellulose (CMC) matrix to fabricate KC/P films for solar‐driven, photoporation‐assisted sterilization. It can induce membrane hyperpolarization and generate localized heat through near infrared absorption to trigger a photothermally enhanced membrane permeabilization process. Meanwhile, it simultaneously produces ROS under visible light upon sunlight irradiation. This combined effect, together with nanopore formation and enhanced intracellular ROS delivery, accelerates bacterial inactivation. The film achieves a 7 log 10 inactivation within 30 min. Notably, the film also exhibits long‐term bacteriostatic effects in the dark. Owing to its excellent antibacterial performance, the KC/P films effectively suppress microbial growth and significantly prolong the shelf life of strawberries. In addition, the film exhibits outstanding biodegradability, achieving 77.73% degradation within 24 days due to their all‐natural bio‐components. This work presents a novel, photoporation assisted antibacterial platform with strong potential for biosafe, sustainable, and high‐performance antimicrobial packaging applications.