Chae, Sang Youn Jung, Hyejin Jeon, Hyo Sang Min, Byoung Koun Hwang, Yun Jeong Joo, Oh-Shim 2024-01-20T09:05:03Z 2024-01-20T09:05:03Z 2021-09-05 2014-08 2050-7488 https://pubs.kist.re.kr/handle/201004/126548 In a dual bandgap system such as WO3/BiVO4, the morphology of each component should be controlled by understanding its properties, in particular with respect to the charge flow in the system. For WO3/BiVO4 photoanodes, a porous BiVO4 film allows contact of an electrolyte to the bottom layer with enhanced surface area, thereby promoting the oxidation reaction, while one-dimensional (1-D) WO3 nanorods, directly grown on F-doped tin oxide, are advantageous for transporting electrons to the back contact. The morphology of the BiVO4 film covered by 1-D WO3 nanorods varies with the addition of organic additives such as ethylcellulose in the metal precursor solution. The cross-sectional images from scanning electron microscopy show that 1-D WO3 nanorods is coated with the BiVO4 layer, which forms a porous top layer that can effectively absorb visible light and enhance charge transfer resulting in enhanced photocurrents. We report on the highest photocurrent at a potential of 1.23 V versus a reversible hydrogen electrode (RHE) by means of a 1-D WO3/BiVO4/Co-Pi photoanode. The strategies for constructing such kind of heterojunctions are well applicable to other dual bandgap photoanodes. English ROYAL SOC CHEMISTRY PHOTOELECTROCHEMICAL CELLS CHARGE SEPARATION OXIDATION BIVO4 PHOTOOXIDATION PROGRESS Morphology control of one-dimensional heterojunctions for highly efficient photoanodes used for solar water splitting Article 10.1039/c4ta00702f 1 JOURNAL OF MATERIALS CHEMISTRY A, v.2, no.29, pp.11408 - 11416 JOURNAL OF MATERIALS CHEMISTRY A 2 29 11408 11416 scie scopus 000339004100049 2-s2.0-84903719786 Chemistry, Physical Energy & Fuels Materials Science, Multidisciplinary Chemistry Energy & Fuels Materials Science Article PHOTOELECTROCHEMICAL CELLS CHARGE SEPARATION OXIDATION BIVO4 PHOTOOXIDATION PROGRESS