Abstract
This work demonstrates that ultrathin (4 nm) tungsten oxide (WO3) coatings on copper gallium selenide (CuGa3Se5) photocathodes have the potential for long-term solar hydrogen evolution. With a combination of a robust 1.84 eV CuGa3Se5 absorber layer, a WO3 protective coating, and a Pt catalyst, we obtain a new durability milestone for any non-silicon photoelectrochemical hydrogen-producing device by passing 21 490 C cm-2 of charge across six weeks of continuously-illuminated chronoamperometric testing under applied bias.
Original language | American English |
---|---|
Pages (from-to) | 384-390 |
Number of pages | 7 |
Journal | Sustainable Energy and Fuels |
Volume | 5 |
Issue number | 2 |
DOIs | |
State | Published - 21 Jan 2021 |
Bibliographical note
Publisher Copyright:© 2021 The Royal Society of Chemistry.
NREL Publication Number
- NREL/JA-5K00-78194
Keywords
- hydrogen
- photoelectrochemical
- water splitting