Back to Search
Start Over
Cu2O as the hole extraction layer modified BiVO4photoanode to enhance charge separation and transfer
- Source :
- Science China Materials; 20240101, Issue: Preprints p1-10, 10p
- Publication Year :
- 2024
-
Abstract
- Photoinduced charge separation and transfer are the core factors affecting the photoelectrochemical performance of BiVO4-based photoanodes. Herein, a hole extraction layer was inserted between a BiVO4photoanode and an oxygen evolution cocatalyst (OEC). The introduction of Cu2O as a hole extraction layer between the OEC layer (FeOOH/NiOOH) and BiVO4optimized the migration paths and extended the lifetimes of the photogenerated holes, thus enhancing the photoelectrochemical performance of the photoelectrode. The charge separation efficiency of the optimized BiVO4/Cu2O/FeOOH/NiOOH photoanode was 92.0% significantly higher than the 70.6% efficiency for pure BiVO4. As expected, this photoanode also displayed a high photocurrent density of 3.85 mA cm−2at 1.23 VRHE(under AM 1.5G illumination), which was 2.77 times greater than that of pure BiVO4. Our results indicate that electrodepositing a Cu2O hole extraction layer is a simple and scalable method for increasing the photoelectrochemical activity of BiVO4photoanodes for solar water splitting.
Details
- Language :
- English
- ISSN :
- 20958226 and 21994501
- Issue :
- Preprints
- Database :
- Supplemental Index
- Journal :
- Science China Materials
- Publication Type :
- Periodical
- Accession number :
- ejs66087114
- Full Text :
- https://doi.org/10.1007/s40843-023-2783-1