Issue 1, 2017

Solar hydrogen production using epitaxial SrTiO3 on a GaAs photovoltaic

Abstract

We demonstrate an oxide-stabilized III–V photoelectrode architecture for solar fuel production from water in neutral pH. For this tunable architecture we demonstrate 100% Faradaic efficiency for hydrogen evolution, and incident photon-to-current efficiencies (IPCE) exceeding 50%. High IPCE for hydrogen evolution is a consequence of the low-loss interface achieved via epitaxial growth of a thin oxide on a GaAs solar cell. Developing optimal energetic alignment across the interfaces of the photoelectrode using well-established III–V technology is key to obtaining high performance. This advance constitutes a critical milestone towards efficient, unassisted fuel production from solar energy.

Graphical abstract: Solar hydrogen production using epitaxial SrTiO3 on a GaAs photovoltaic

Supplementary files

Article information

Article type
Paper
Submitted
28 Oct 2016
Accepted
22 Dec 2016
First published
22 Dec 2016
This article is Open Access
Creative Commons BY license

Energy Environ. Sci., 2017,10, 377-382

Solar hydrogen production using epitaxial SrTiO3 on a GaAs photovoltaic

L. Kornblum, D. P. Fenning, J. Faucher, J. Hwang, A. Boni, M. G. Han, M. D. Morales-Acosta, Y. Zhu, E. I. Altman, M. L. Lee, C. H. Ahn, F. J. Walker and Y. Shao-Horn, Energy Environ. Sci., 2017, 10, 377 DOI: 10.1039/C6EE03170F

This article is licensed under a Creative Commons Attribution 3.0 Unported Licence. You can use material from this article in other publications without requesting further permissions from the RSC, provided that the correct acknowledgement is given.

Read more about how to correctly acknowledge RSC content.

Social activity

Spotlight

Advertisements