Fehr, A.M.K.; Agrawal, A.; Mandani, F.; Conrad, C.L.; Jiang, Q.; Park, S.Y.; Alley, O.; Li, B.; Sidhik, S.; Metcalf, I.; Botello, C.; Young, J.L.; Even, J.; Blancon, J.C.; Deutsch, T.G.; Zhu, K.; Albrecht, S.; Toma, F.M.; Wong, M.; Mohite, A.D.: Integrated halide perovskite photoelectrochemical cells with solar-driven water-splitting efficiency of 20.8%. Nature Communications 14 (2023), p. 3797/1-12
10.1038/s41467-023-39290-y
Open Access Version
Abstract:
Achieving high solar-to-hydrogen (STH) efficiency concomitant with long-term durability using low-cost, scalable photo-absorbers is a long-standing challenge. Here we report the design and fabrication of a conductive adhesive-barrier (CAB) that translates >99% of photoelectric power to chemical reactions. The CAB enables halide perovskite-based photoelectrochemical cells with two different architectures that exhibit record STH efficiencies. The first, a co-planar photocathode-photoanode architecture, achieved an STH efficiency of 13.4% and 16.3 h to t60, solely limited by the hygroscopic hole transport layer in the n-i-p device. The second was formed using a monolithic stacked silicon-perovskite tandem, with a peak STH efficiency of 20.8% and 102 h of continuous operation before t60 under AM 1.5G illumination. These advances will lead to efficient, durable, and low-cost solar-driven water-splitting technology with multifunctional barriers.