Gate-controlled suppression of light-driven proton transport through graphene electrodes

S. Huang, E. Griffin, J. Cai, B. Xin, J. Tong, Y. Fu, V. Kravets, F. M. Peeters, M. Lozada-Hidalgo

Research output: Contribution to journalArticlepeer-review

Abstract

Recent experiments demonstrated that proton transport through graphene electrodes can be accelerated by over an order of magnitude with low intensity illumination. Here we show that this photo-effect can be suppressed for a tuneable fraction of the infrared spectrum by applying a voltage bias. Using photocurrent measurements and Raman spectroscopy, we show that such
fraction can be selected by tuning the Fermi energy of electrons in graphene with a bias, a phenomenon controlled by Pauli blocking of photo-excited electrons. These findings demonstrate a dependence between graphene’s electronic and proton transport properties and provide fundamental insights into molecularly thin electrode-electrolyte interfaces and their interaction with light.
Original languageEnglish
Article number6932
JournalNature Communications
Volume14
DOIs
Publication statusPublished - 31 Oct 2023

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