Surface functionalization-induced photoresponse characteristics of monolayer MoS2 for fast flexible photodetectors
DC Field | Value | Language |
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dc.contributor.author | Pak, Sangyeon | - |
dc.contributor.author | Jang, A-Rang | - |
dc.contributor.author | Lee, Juwon | - |
dc.contributor.author | Hong, John | - |
dc.contributor.author | Giraud, Paul | - |
dc.contributor.author | Lee, Sanghyo | - |
dc.contributor.author | Cho, Yuljae | - |
dc.contributor.author | An, Geon-Hyoung | - |
dc.contributor.author | Lee, Young-Woo | - |
dc.contributor.author | Shin, Hyeon Suk | - |
dc.contributor.author | Morris, Stephen M. | - |
dc.contributor.author | Cha, SeungNam | - |
dc.contributor.author | Sohn, Jung Inn | - |
dc.contributor.author | Kim, Jong Min | - |
dc.date.accessioned | 2021-08-11T10:23:26Z | - |
dc.date.available | 2021-08-11T10:23:26Z | - |
dc.date.issued | 2019-03-21 | - |
dc.identifier.issn | 2040-3364 | - |
dc.identifier.issn | 2040-3372 | - |
dc.identifier.uri | https://scholarworks.bwise.kr/sch/handle/2021.sw.sch/4646 | - |
dc.description.abstract | Monolayered, semiconducting molybdenum disulfide (MoS2) is of considerable interest for its potential applications in next-generation flexible, wearable, and transparent photodetectors because it has outstanding physical properties coupled with unique atomically thin dimensions. However, there is still a lack of understanding in terms of the underlying mechanisms responsible for the photoresponse dynamics, which makes it difficult to identify the appropriate device design strategy for achieving a fast photoresponse time in MoS2 photodetectors. In this study, we investigate the importance of surface functionalization on controlling the charge carrier densities in a MoS2 monolayer and in turn the corresponding behavior of the photoresponse in relation to the position of the Fermi-level and the energy band structure. We find that the p-doping and n-doping, which is achieved through the surface functionalization of the MoS2 monolayer, leads to devices with different photoresponse behavior. Specifically, the MoS(2 )devices with surface functional groups contributing to p-doping exhibited a faster response time as well as higher sensitivity compared to that observed for the MoS2 devices with surface functional groups contributing to n-doping. We attribute this difference to the degree of bending in the energy bands at the metal-semiconductor junction as a result of shifting in the Fermi-level position, which influences the optoelectronic transport properties as well as the recombination dynamics leading to a low dark and thus high detectivity and fast decay time. Based upon these findings, we have also demonstrated the broad applicability of surface functionalization by fabricating a flexible MoS2 photodetector that shows an outstanding decay time of 0.7 s, which is the fastest response time observed in flexible MoS2 detectors ever reported. | - |
dc.format.extent | 9 | - |
dc.language | 영어 | - |
dc.language.iso | ENG | - |
dc.publisher | Royal Society of Chemistry | - |
dc.title | Surface functionalization-induced photoresponse characteristics of monolayer MoS2 for fast flexible photodetectors | - |
dc.type | Article | - |
dc.publisher.location | 영국 | - |
dc.identifier.doi | 10.1039/c8nr07655c | - |
dc.identifier.scopusid | 2-s2.0-85062878943 | - |
dc.identifier.wosid | 000462669600009 | - |
dc.identifier.bibliographicCitation | Nanoscale, v.11, no.11, pp 4726 - 4734 | - |
dc.citation.title | Nanoscale | - |
dc.citation.volume | 11 | - |
dc.citation.number | 11 | - |
dc.citation.startPage | 4726 | - |
dc.citation.endPage | 4734 | - |
dc.type.docType | Article | - |
dc.description.isOpenAccess | N | - |
dc.description.journalRegisteredClass | sci | - |
dc.description.journalRegisteredClass | scie | - |
dc.description.journalRegisteredClass | scopus | - |
dc.relation.journalResearchArea | Chemistry | - |
dc.relation.journalResearchArea | Science & Technology - Other Topics | - |
dc.relation.journalResearchArea | Materials Science | - |
dc.relation.journalResearchArea | Physics | - |
dc.relation.journalWebOfScienceCategory | Chemistry, Multidisciplinary | - |
dc.relation.journalWebOfScienceCategory | Nanoscience & Nanotechnology | - |
dc.relation.journalWebOfScienceCategory | Materials Science, Multidisciplinary | - |
dc.relation.journalWebOfScienceCategory | Physics, Applied | - |
dc.subject.keywordPlus | CHARGE-CARRIER TRANSPORT | - |
dc.subject.keywordPlus | HIGH-PERFORMANCE | - |
dc.subject.keywordPlus | TRANSISTORS | - |
dc.subject.keywordPlus | GAIN | - |
dc.subject.keywordPlus | ELECTRONICS | - |
dc.subject.keywordPlus | CELLS | - |
dc.subject.keywordAuthor | Surface functionalization-induced photoresponse characteristics of monolayer MoS2 for fast flexible photodetectors | - |
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