Altinisik, Sinem2026-02-032026-02-0320262470-1343https://doi.org/10.1021/acsomega.5c09977https://hdl.handle.net/20.500.12428/34781Porous organic polymers (POPs) are generally prepared as insoluble powders and coated onto the electrode surface with another polymer binders such as PVDF: HFP during electrode preparation. POP-based electrodes formed through surface cross-linking hold promise for supercapacitor applications. In this study, a new pyridinium-fluorene donor-acceptor monomer (FBP_allyl) was synthesized and cross-linked onto graphene sheet conductive substrates via a thiol-ene click reaction to prepare a photoactive polymer electrode with light-harvesting and charge storage capability. The specific capacitance of the fabricated electrodes at 2.0 A/g was almost doubled under visible light, from 152.7 F/g (dark) to 304.1 F/g (light). In a three-electrode configuration, the electrochemical cell exhibited a power density of over 3000 W/kg, while the energy density increased from 35 to 60 Wh/kg under illumination. Furthermore, the prepared electrode cell showed long-term stability over 10,000 cycles, demonstrating that combining donor-acceptor engineering with thiol-ene cross-coupling is an effective approach for developing photoassisted capacitors with improved electrochemical performance.eninfo:eu-repo/semantics/openAccessElectrochemical Energy-StorageNanosheetsArticle1111826183510.1021/acsomega.5c09977Q2WOS:0016435581000012-s2.0-10502730451741552468Q1