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DC Field | Value | Language |
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dc.citation.title | NANO ENERGY | - |
dc.citation.volume | 76 | - |
dc.contributor.author | Park, Juhyung | - |
dc.contributor.author | Yoon, Ki-Yong | - |
dc.contributor.author | Kim, Taehyo | - |
dc.contributor.author | Jang, Hyungsu | - |
dc.contributor.author | Kwak, Myung-Jun | - |
dc.contributor.author | Kim, Jin Young | - |
dc.contributor.author | Jang, Ji-Hyun | - |
dc.date.accessioned | 2023-12-21T17:19:01Z | - |
dc.date.available | 2023-12-21T17:19:01Z | - |
dc.date.created | 2020-09-17 | - |
dc.date.issued | 2020-06 | - |
dc.description.abstract | A tandem system consisting of a combined hematite photoanode/perovskite solar cell is a novel configuration enabling unbiased solar-driven water splitting in a cost-efficient way. However, similar light absorption spectrums between hematite and perovskite, causing significant optical loss of the solar cell located behind the photoelectrochemical cell, have been a critical issue, resulting in a substantial reduction in the overall photoelectrochemical performance in the bias-free tandem system. Herein, we report an efficient thin film hematite/perovskite tandem cell optimized with consideration of both quantum efficiency of the hematite photoanode and optical loss of the solar cell. Ti,Si co-doping with controlled dopability and deposition of transparent NiFeOx co-catalyst on hematite (NiFeOx@Ti:Si–Fe2O3(t)) allowed for highly improved surface reaction kinetics and charge transport behaviors, endowing our thin film with state-of-the-art performance among thin film hematite photoanodes reported to date, with a photocurrent density of 2.62mAcm−2 at 1.23VRHE and an onset potential of 0.71V. The perovskite solar cell in the thin hematite/solar cell exhibited an anodic shift of Voc from 1.08V to 1.16V and a three-fold increased photocurrent density (15.5mAcm−2) compared to the solar cell of the conventional thick hematite/solar cell system. The assembled dual photoanodes (dual NiFeOx@Ti:Si–Fe2O3) reached a maximum photocurrent density of 4.0mAcm−2 at 1.23VRHE. Our tandem photoelectrochemical system comprising assembled dual thin film NiFeOx@Ti:Si–Fe2O3/solar cell showed outstanding performance of an unbiased solar-to-hydrogen (STH) conversion efficiency of 4.49%, which is the highest recorded value in the hematite/perovskite tandem cell systems. This work provides a great potential for further development of an unassisted solar water splitting system with the thin film hematite. © 2020 | - |
dc.identifier.bibliographicCitation | NANO ENERGY, v.76 | - |
dc.identifier.doi | 10.1016/j.nanoen.2020.105089 | - |
dc.identifier.issn | 2211-2855 | - |
dc.identifier.scopusid | 2-s2.0-85088131282 | - |
dc.identifier.uri | https://scholarworks.unist.ac.kr/handle/201301/48350 | - |
dc.identifier.url | https://www.sciencedirect.com/science/article/pii/S2211285520306662?via%3Dihub | - |
dc.identifier.wosid | 000571079800004 | - |
dc.language | 영어 | - |
dc.publisher | Elsevier BV | - |
dc.title | A highly transparent thin film hematite with multi-element dopability for an efficient unassisted water splitting system | - |
dc.type | Article | - |
dc.description.isOpenAccess | FALSE | - |
dc.type.docType | Article | - |
dc.description.journalRegisteredClass | scie | - |
dc.description.journalRegisteredClass | scopus | - |
dc.subject.keywordAuthor | Controlled dopability | - |
dc.subject.keywordAuthor | Optical loss | - |
dc.subject.keywordAuthor | Perovskite | - |
dc.subject.keywordAuthor | Tandem system | - |
dc.subject.keywordAuthor | Thin film hematite | - |
dc.subject.keywordAuthor | Unbiased solar-driven water splitting | - |
dc.subject.keywordPlus | Photoelectrochemical performance | - |
dc.subject.keywordPlus | Photoelectrochemical system | - |
dc.subject.keywordPlus | Solar water splitting | - |
dc.subject.keywordPlus | Solar-to-hydrogen conversions | - |
dc.subject.keywordPlus | State-of-the-art performance | - |
dc.subject.keywordPlus | Substantial reduction | - |
dc.subject.keywordPlus | Transparent thin film | - |
dc.subject.keywordPlus | Water splitting system | - |
dc.subject.keywordPlus | Thin films | - |
dc.subject.keywordPlus | Absorption spectroscopy | - |
dc.subject.keywordPlus | Deposition | - |
dc.subject.keywordPlus | Efficiency | - |
dc.subject.keywordPlus | Hematite | - |
dc.subject.keywordPlus | Light absorption | - |
dc.subject.keywordPlus | Nickel compounds | - |
dc.subject.keywordPlus | Perovskite | - |
dc.subject.keywordPlus | Perovskite solar cells | - |
dc.subject.keywordPlus | Photocurrents | - |
dc.subject.keywordPlus | Photoelectrochemical cells | - |
dc.subject.keywordPlus | Reaction kinetics | - |
dc.subject.keywordPlus | Semiconductor doping | - |
dc.subject.keywordPlus | Silicon | - |
dc.subject.keywordPlus | Silicon compounds | - |
dc.subject.keywordPlus | Solar power generation | - |
dc.subject.keywordPlus | Surface reactions | - |
dc.subject.keywordPlus | Thin film solar cells | - |
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