Affiliation:
1. Key Laboratory for Biobased Materials and Energy of Ministry of Education College of Materials and Energy South China Agricultural University Guangzhou 510642 China
2. Joint Key Laboratory of the Ministry of Education Institute of Applied Physics and Materials Engineering University of Macau Macau 999078 China
Abstract
AbstractNanohybrid photosystems have advantages in converting solar energy into electricity, while natural photosystems based solar‐powered energy‐storage device is still under developed. Here, we fabricate a new kind of photo‐rechargeable zinc‐ion hybrid capacitor (ZHC) benefiting from light‐harvesting carbon dots (CDs) and natural thylakoids for realizing solar energy harvesting and storage simultaneously. Under solar light irradiation, the embedded CDs in thylakoids (CDs/Thy) can convert the less absorbed green light into highly absorbed red light for thylakoids, besides, Förster resonance energy transfer (FRET) between CDs and Thy also occurs, which facilitates the photoelectrons generation during thylakoids photosynthesis, thereby resulting in 6‐fold photocurrent output in CDs/Thy hybrid photosystem, compared to pristine thylakoids. Using CDs/Thy as the photocathode in ZHCs, the photonic hybrid capacitor shows photoelectric conversion and storage features. CDs can improve the photo‐charging voltage response of ZHCs to ≈1.2 V with a remarkable capacitance enhancement of 144 % under solar light. This study provides a promising strategy for designing plant‐based photonic and electric device for solar energy harvesting and storage.
Funder
Basic and Applied Basic Research Foundation of Guangdong Province