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Song, Myoung Hoon
Organic Photonics & Optoelectronics Lab
Research Interests
  • Organic optoelectrics, perovskite light-emitting diodes, surface treatment, photonic crystals

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Activating the surface and bulk of hematite photoanodes to improve solar water splitting

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dc.contributor.author Zhang, Hemin ko
dc.contributor.author Park, Jong Hyun ko
dc.contributor.author Byun, Woojin ko
dc.contributor.author Song, Myoung Hoon ko
dc.contributor.author Lee, Jae Sung ko
dc.date.available 2019-12-20T00:30:19Z -
dc.date.created 2019-12-06 ko
dc.date.issued 2019-11 ko
dc.identifier.citation CHEMICAL SCIENCE, v.10, no.44, pp.10436 - 10444 ko
dc.identifier.issn 2041-6520 ko
dc.identifier.uri https://scholarworks.unist.ac.kr/handle/201301/30606 -
dc.description.abstract A simple electrochemical activation treatment is proposed to improve effectively the photoelectrochemical performance of Nb,Sn co-doped hematite nanorods. The activation process involves an initial thrice cathodic scanning (reduction) and a subsequent thrice anodic scanning (oxidation), which modifies both the surface and bulk properties of the Nb,Sn:Fe2O3 photoanode. First, it selectively removes the surface components to different extents endowing the hematite surface with fewer defects and richer Nb-O and Sn-O bonds and thus passivates the surface trap states. The surface passivation effect also enhances the photoelectrochemical stability of the photoanode. Finally, more Fe2+ ions or oxygen vacancies are generated in the bulk of hematite to enhance its conductivity. As a result, the photocurrent density is increased by 62.3% from 1.88 to 3.05 mA cm(-2) at 1.23 V-RHE, the photocurrent onset potential shifts cathodically by similar to 70 mV, and photoelectrochemical stability improves remarkably relative to the pristine photoanode under simulated sunlight (100 mW cm(-2)). ko
dc.language 영어 ko
dc.publisher ROYAL SOC CHEMISTRY ko
dc.title Activating the surface and bulk of hematite photoanodes to improve solar water splitting ko
dc.type ARTICLE ko
dc.identifier.scopusid 2-s2.0-85075066259 ko
dc.identifier.wosid 000497283300026 ko
dc.type.rims ART ko
dc.identifier.doi 10.1039/c9sc04110a ko
dc.identifier.url https://pubs.rsc.org/en/content/articlelanding/2019/SC/C9SC04110A#!divAbstract ko
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