WO3/W:BiVO4/BiVO4 graded photoabsorber electrode for enhanced photoelectrocatalytic solar light driven water oxidation
- Authors
- Choi, Junghyun; Sudhagar, Pitchaimuthu; Kim, Joo Hyun; Kwon, Jiseok; Kim, Jeonghyun; Terashima, Chiaki; Fujishima, Akira; Song, Taeseup; Paik, Ungyu
- Issue Date
- Feb-2017
- Publisher
- ROYAL SOC CHEMISTRY
- Citation
- PHYSICAL CHEMISTRY CHEMICAL PHYSICS, v.19, no.6, pp.4648 - 4655
- Indexed
- SCIE
SCOPUS
- Journal Title
- PHYSICAL CHEMISTRY CHEMICAL PHYSICS
- Volume
- 19
- Number
- 6
- Start Page
- 4648
- End Page
- 4655
- URI
- https://scholarworks.bwise.kr/hanyang/handle/2021.sw.hanyang/4822
- DOI
- 10.1039/c6cp08199a
- ISSN
- 1463-9076
- Abstract
- We demonstrate the dual advantages of graded photoabsorbers in mesoporous metal oxide-based hetero interfacial photoanodes in improving photogenerated charge carrier (e−/h+) separation for the solar light-driven water-oxidation process. The pre-deposition of sol–gel-derived, tungsten-doped bismuth vanadate (W:BiVO4) onto a primary BiVO4 water oxidation layer forms graded interfaces, which facilitate charge transfer from the primary photoabsorber to the charge transport layer, thereby superseding the thickness-controlled charge recombination at the BiVO4 water oxidation catalyst. As a result, the WO3/BiVO4 hetero photoanode containing the photoactive W:BiVO4 interfacial layer showed 130% higher photocurrent than that of the interfacial layer-free hetero photoelectrode owing to the enhanced charge separation led water oxidation process.
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