Integrated Halide Perovskite Photoelectrochemical Cells with Solar-Driven Water-Splitting Efficiency of 20.8%

Austin Fehr, Ayush Agrawal, Faiz Mandani, Christian Conrad, Qi Jiang, So Yeon Park, Olivia Alley, Bor Li, Siraj Sidhik, Isaac Metcalf, Christopher Botello, James L. Young, Jacky Even, Jean Christophe Blancon, Todd Deutsch, Kai Zhu, Steve Albrecht, Francesca Toma, Michael Wong, Aditya Mohite

Research output: Contribution to journalArticlepeer-review

30 Scopus Citations


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.

Original languageAmerican English
Article numberArticle No. 3797
Number of pages12
JournalNature Communications
Issue number1
StatePublished - Dec 2023

Bibliographical note

Publisher Copyright:
© 2023, The Author(s).

NREL Publication Number

  • NREL/JA-5900-86533


  • hydrogen
  • perovskite
  • photoelectrochemical cell
  • silicon
  • tandem


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