Donor‐Acceptor Conjugated Microporous Polymers for Solar‐Driven Interfacial Evaporation and Water‐Electricity Cogeneration

ABSTRACT In this study, two fully conjugated microporous polymers (ICTO‐CMP1 and ICTO‐CMP2) were synthesized via aldol condensation, and they hold broad light absorption properties, excellent photothermal conversion efficiency, and superior stability. Under 660 nm laser irradiation at 100 mW cm −2 , the surface temperature of ICTO‐CMP1 rapidly increased from room temperature to 140°C within 1 min. Moreover, the interfacial solar evaporation system based on ICTO‐CMP1 achieves a high water evaporation rate of 3.67 kg m −2 h −1 with a solar‐to‐vapor efficiency of 96.3% under simulated sunlight irradiation, and the corresponding thermoelectric device delivers an output voltage of 290 mV. Furthermore, ICTO‐CMP1 enables simultaneous water desalination and electricity generation. This study offers a viable route for developing conjugated porous polymer‐based solar absorbers for photo‐thermo‐electric conversion applications.