1. Wavelength dependent photochemical charge transfer at the Cu2O–BiVO4 particle interface – evidence for tandem excitation
- Author
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Zongkai Wu, Frank E. Osterloh, Jiarui Wang, Ghunbong Cheung, and Zeqiong Zhao
- Subjects
Materials science ,Surface photovoltage ,02 engineering and technology ,010402 general chemistry ,Photochemistry ,01 natural sciences ,Catalysis ,Artificial photosynthesis ,chemistry.chemical_compound ,Materials Chemistry ,Spectroscopy ,Tandem ,business.industry ,Metals and Alloys ,General Chemistry ,021001 nanoscience & nanotechnology ,0104 chemical sciences ,Surfaces, Coatings and Films ,Electronic, Optical and Magnetic Materials ,Semiconductor ,chemistry ,Bismuth vanadate ,Ceramics and Composites ,Particle ,Water splitting ,0210 nano-technology ,business - Abstract
The understanding of the photochemical charge transfer properties of powdered semiconductors is of relevance to artificial photosynthesis and the production of solar fuels. Here we use surface photovoltage spectroscopy to probe photoelectrochemical charge transfer between bismuth vanadate (BiVO4) and cuprous oxide (Cu2O) particles as a function of wavelength and film thickness. Optimized conditions produce a −2.10 V photovoltage under 2.5 eV (0.1 mW cm−2) illumination, which suggests the possibility of a water splitting system based on a BiVO4–Cu2O direct contact particle tandem.
- Published
- 2018
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