Bias-free Solar to Ammonia Production via Integrated Perovskite-Organic Tandem Photovoltaics
발표자
신동현 (부산대학교)
연구책임자
이택호 (부산대학교)
공동저자
신동현 (부산대학교), 이택호 (부산대학교)
초록
내용
Perovskite/organic tandem solar cells (PO-TSCs) offer high photovoltage and solution processability, making them attractive power sources for bias-free photovoltaic–electrochemical (PV–EC) conversion. However, their integration into PV–EC systems requires minimizing interfacial losses and ensuring stable charge extraction at selective contacts. Herein, we report a simplified interfacial engineering strategy by incorporating Al₂O₃ into a MeO-4PACz self-assembled monolayer to form a mixed hole-selective layer (m-HSL) via a single-step deposition. The resulting PO-TSC attains a power conversion efficiency of 22.85% with an exceptional open-circuit voltage (VOC) of 2.13 V. Exploiting this exceptional photovoltage, we directly couple the PO-TSC with a two-electrode nitrate electrolyzer to realize solar-driven nitrate-to-ammonia conversion without external bias. The integrated device achieves a solar-to-ammonia efficiency of 2.6% with a Faradaic efficiency of 56%. This work establishes a robust tandem-driven PV–EC framework for nitrate reduction and provides a foundation for solar-driven ammonia production.