Integrated halide perovskite photoelectrochemical cells with solar-driven water-splitting efficiency of 20.8%

Austin Fehr (1) , Ayush Agrawal (1) , Faiz Mandani (1) , Christian Conrad (1) , Qi Jiang (2) , So Yeon Park (2) , Olivia Alley (3) , Bor Li (4) , Siraj Sidhik (1) , Isaac Metcalf (1) , Christopher Botello (1) , James Young (2) , Jacky Even (5) , Jean Christophe Blancon (1) , Todd Deutsch (2) , Kai Zhu (2) , Steve Albrecht (4) , Francesca Toma (3) , Aditya Mohite (1)

1 Rice University [Houston]
2 NREL - National Renewable Energy Laboratory
3 LBNL - Lawrence Berkeley National Laboratory [Berkeley]
4 HZB - Helmholtz-Zentrum Berlin für Materialien und Energie GmbH = Helmholtz Centre Berlin for Materials and Energy = Centre Helmholtz de Berlin pour les matériaux et l'énergie
5 FOTON - Institut des Fonctions Optiques pour les Technologies de l'informatiON

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 t, 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 t under AM 1.5G illumination. These advances will lead to efficient, durable, and low-cost solar-driven water-splitting technology with multifunctional barriers.

Domaines: Physique [physics]; Chimie

Austin Fehr, Ayush Agrawal, Faiz Mandani, Christian Conrad, Qi Jiang, et al.. Integrated halide perovskite photoelectrochemical cells with solar-driven water-splitting efficiency of 20.8%. Nature Communications, 2023, 14 (1), pp.3797. ⟨10.1038/s41467-023-39290-y⟩. ⟨hal-04161559⟩