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.

使用低成本、可扩展的光吸收器实现高太阳能制氢（STH）效率并同时具有长期耐用性是一项长期挑战。在此，我们报告了导电粘合剂屏障 (CAB) 的设计和制造，该粘合剂屏障可将 > 99% 的光电功率转化为化学反应。CAB 使基于卤化物钙钛矿的光电化学电池具有两种不同的架构，表现出创纪录的 STH 效率。第一种是共面光电阴极-光电阳极架构，实现了 13.4% 的 STH 效率和 16.3 h 至 t ₆₀，仅受压区器件中吸湿空穴传输层的限制。第二个是使用单片堆叠硅钙钛矿串联形成的，峰值 STH 效率为 20.8%，并且在 t _{60之前连续运行 102 小时。}AM 1.5G 照明下。这些进步将带来高效、耐用、低成本、具有多功能屏障的太阳能驱动水分解技术。