Full metadata record
DC Field | Value | Language |
---|---|---|
dc.contributor.author | 박원일 | - |
dc.date.accessioned | 2019-07-26T07:44:56Z | - |
dc.date.available | 2019-07-26T07:44:56Z | - |
dc.date.issued | 2019-01 | - |
dc.identifier.citation | SMALL, v. 15, NO 2, Page. 1804303 | en_US |
dc.identifier.issn | 1613-6810 | - |
dc.identifier.issn | 1613-6829 | - |
dc.identifier.uri | https://onlinelibrary.wiley.com/doi/full/10.1002/smll.201804303 | - |
dc.identifier.uri | https://repository.hanyang.ac.kr/handle/20.500.11754/107959 | - |
dc.description.abstract | Ultralow power chemical sensing is essential toward realizing the Internet of Things. However, electrically driven sensors must consume power to generate an electrical readout. Here, a different class of self-powered chemical sensing platform based on unconventional photovoltaic heterojunctions consisting of a top graphene (Gr) layer in contact with underlying photoactive semiconductors including bulk silicon and layered transition metal dichalcogenides is proposed. Owing to the chemically tunable electrochemical potential of Gr, the built-in potential at the junction is effectively modulated by absorbed gas molecules in a predictable manner depending on their redox characteristics. Such ability distinctive from bulk photovoltaic counterparts enables photovoltaic-driven chemical sensing without electric power consumption. Furthermore, it is demonstrated that the hydrogen (H-2) sensing properties are independent of the light intensity, but sensitive to the gas concentration down to the 1 ppm level at room temperature. These results present an innovative strategy to realize extremely energy-efficient sensors, providing an important advancement for future ubiquitous sensing. | en_US |
dc.description.sponsorship | D.L. and H.P. contributed equally to this work. This work was supported by the National Research Foundation (NRF) of Korea (2017R1D1A1B03035441 and 2017R1A5A1014862 (SRC Program: vdWMRC Center)), the KU-KIST School Project, a Korea University Grant, and TJ Park Science Fellowship of POSCO TJ Park Foundation. W.I.P acknowledges support by the National Research Foundation (NRF) of Korea funded by the Korean government (MSIP) (No. 2018R1A2B2006410). | en_US |
dc.language.iso | en | en_US |
dc.publisher | WILEY-V C H VERLAG GMBH | en_US |
dc.subject | 2D materials | en_US |
dc.subject | chemical sensors | en_US |
dc.subject | graphene | en_US |
dc.subject | heterostructures | en_US |
dc.subject | photovoltaic | en_US |
dc.title | Self-Powered Chemical Sensing Driven by Graphene-Based Photovoltaic Heterojunctions with Chemically Tunable Built-In Potentials | en_US |
dc.type | Article | en_US |
dc.relation.no | 2 | - |
dc.relation.volume | 15 | - |
dc.identifier.doi | 10.1002/smll.201804303 | - |
dc.relation.page | 1-10 | - |
dc.relation.journal | SMALL | - |
dc.contributor.googleauthor | Lee, Donghun | - |
dc.contributor.googleauthor | Park, Haeli | - |
dc.contributor.googleauthor | Han, Soo Deok | - |
dc.contributor.googleauthor | Kim, Su Han | - |
dc.contributor.googleauthor | Huh, Woong | - |
dc.contributor.googleauthor | Lee, Jae Yoon | - |
dc.contributor.googleauthor | Kim, Yoon Seok | - |
dc.contributor.googleauthor | Park, Myung Jin | - |
dc.contributor.googleauthor | Park, Won Il | - |
dc.contributor.googleauthor | Kang, Chong-Yun | - |
dc.relation.code | 2019000623 | - |
dc.sector.campus | S | - |
dc.sector.daehak | COLLEGE OF ENGINEERING[S] | - |
dc.sector.department | DIVISION OF MATERIALS SCIENCE AND ENGINEERING | - |
dc.identifier.pid | wipark | - |
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