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


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

DC Field Value Language Zhang, Hemin ko Park, Jong Hyun ko Byun, Woojin ko Song, Myoung Hoon ko Lee, Jae Sung ko 2019-12-20T00:30:19Z - 2019-12-06 ko 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 -
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!divAbstract ko
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