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DC Field | Value | Language |
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dc.citation.endPage | 17822 | - |
dc.citation.number | 44 | - |
dc.citation.startPage | 17816 | - |
dc.citation.title | JOURNAL OF MATERIALS CHEMISTRY | - |
dc.citation.volume | 21 | - |
dc.contributor.author | Cho, Seungho | - |
dc.contributor.author | Jang, Ji-Wook | - |
dc.contributor.author | Lim, Sang-Hoon | - |
dc.contributor.author | Kang, Hyun Joon | - |
dc.contributor.author | Rhee, Shi-Woo | - |
dc.contributor.author | Lee, Jae Sung | - |
dc.contributor.author | Lee, Kun-Hong | - |
dc.date.accessioned | 2023-12-22T05:40:51Z | - |
dc.date.available | 2023-12-22T05:40:51Z | - |
dc.date.created | 2015-07-27 | - |
dc.date.issued | 2011-11 | - |
dc.description.abstract | We report a method for synthesizing ZnO/ZnSe heterostructure nanowire arrays for use in photoelectrochemical (PEC) water splitting. The surfaces of ZnO nanowires immobilized on a conducting glass substrate were modified to form ZnO/ZnSe heterostructure nanowire arrays through a reaction with an aqueous sodium selenite and hydrazine solution. ZnO/ZnSe heterostructure nanowires with different morphologies were synthesized by varying solution concentrations and reaction times. The ZnO nanowire/ZnSe nanoparticle heterostructures (ZS1) were synthesized by a dissolution-recrystallization mechanism. At longer reaction times and higher solution concentrations, the nanostructure arrays transformed into ZnO nanowire/ZnSe nanosphere heterostructure arrays (ZS2) via Ostwald ripening. ZnO/ZnSe heterostructure arrays (ZS1 and ZS2) yielded higher photocurrents than the pristine ZnO nanowire arrays in a PEC water splitting test under AM 1.5G simulated solar light. The ZnO/ZnSe heterostructure array photoanodes exhibited absorption in the visible spectrum (<550 nm in wavelength) with a high incident-photon-to-current-conversion efficiency (IPCE) of up to 47% (ZS1) or 57% (ZS2) at 0.0 V vs. Ag/AgCl. The photoanode yielded a relatively high photocurrent density of 1.67 mA cm(-2) (ZS1) or 2.35 mA cm(-2) (ZS2) at 0.3 V compared to the ZnO nanowire arrays (0.125 mA cm(-2)). Structural differences between ZS1 and ZS2 yielded different PEC performances. A comparison to ZS2 revealed that ZS1 exhibited a higher photocurrent density under a low applied potential (from -0.78 V to -0.07 V) and a lower photocurrent density under a high applied potential (above -0.07 V) | - |
dc.identifier.bibliographicCitation | JOURNAL OF MATERIALS CHEMISTRY, v.21, no.44, pp.17816 - 17822 | - |
dc.identifier.doi | 10.1039/c1jm14014k | - |
dc.identifier.issn | 0959-9428 | - |
dc.identifier.scopusid | 2-s2.0-80455141575 | - |
dc.identifier.uri | https://scholarworks.unist.ac.kr/handle/201301/12632 | - |
dc.identifier.url | http://pubs.rsc.org/en/Content/ArticleLanding/2011/JM/c1jm14014k#!divAbstract | - |
dc.identifier.wosid | 000296390600041 | - |
dc.language | 영어 | - |
dc.publisher | ROYAL SOC CHEMISTRY | - |
dc.title.alternative | Solution-based fabrication of ZnO/ZnSe heterostructure nanowire arrays for solar energy conversion | - |
dc.title | Solution-based fabrication of ZnO/ZnSe heterostructure nanowire arrays for solar energy conversion | - |
dc.type | Article | - |
dc.description.journalRegisteredClass | scie | - |
dc.description.journalRegisteredClass | scopus | - |
dc.subject.keywordPlus | PHOTOELECTROCHEMICAL HYDROGEN GENERATION | - |
dc.subject.keywordPlus | ZNO NANOSTRUCTURES | - |
dc.subject.keywordPlus | PHOTOCATALYTIC DEGRADATION | - |
dc.subject.keywordPlus | NANOTREE ARRAYS | - |
dc.subject.keywordPlus | QUANTUM DOTS | - |
dc.subject.keywordPlus | GROWTH | - |
dc.subject.keywordPlus | FILMS | - |
dc.subject.keywordPlus | TIO2 | - |
dc.subject.keywordPlus | PHOTOSENSITIZATION | - |
dc.subject.keywordPlus | NANOPARTICLES | - |
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