Robust Hierarchically Structured Biphasic Ambipolar Oxide Photoelectrodes for Light-Driven Chemical Regulation and Switchable Logic Applications

Wiktor S Bourée; Mathieu S Prévot; Xavier A Jeanbourquin; Néstor Guijarro; Melissa Johnson; Florian Le Formal; Kevin Sivula

doi:10.1002/adma.201602265

Robust Hierarchically Structured Biphasic Ambipolar Oxide Photoelectrodes for Light-Driven Chemical Regulation and Switchable Logic Applications

Adv Mater. 2016 Nov;28(42):9308-9312. doi: 10.1002/adma.201602265. Epub 2016 Sep 8.

Authors

Wiktor S Bourée¹, Mathieu S Prévot¹, Xavier A Jeanbourquin¹, Néstor Guijarro¹, Melissa Johnson¹, Florian Le Formal¹, Kevin Sivula¹

Affiliation

¹ Laboratory for Molecular Engineering of Optoelectronic Nanomaterials, Ecole Polytechnique Fédérale de Lausanne (EPFL), Station 6, 1015, Lausanne, Switzerland.

PMID: 27604410
DOI: 10.1002/adma.201602265

Abstract

Tunable ambipolar photoelectrochemical behavior emerges from microdomains of nanostructured p-type CuFeO₂ and n-type Fe₂ O₃ that arise from a single facile solution-processed thin film. The switchable operation of this system is controlled by chemical, optical, or electronic inputs with a uniquely high photocurrent response (on the order of 1 mA cm^-2 ), suitable for robust practical application as an oxygen photoregulator.

Keywords: ambipolar semiconductors; copper iron oxide; oxygen evolution reaction; oxygen reduction reaction; photoelectrochemical switching.