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Self-powered UV-visible photodetector with fast response and high photosensitivity employing an Fe:TiO2/n-Si heterojunction
DC Field | Value | Language |
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dc.contributor.author | Sun, Lin | - |
dc.contributor.author | Wang, Chunrui | - |
dc.contributor.author | Ji, Tao | - |
dc.contributor.author | Wang, Jiale | - |
dc.contributor.author | Yi, Gyu-Chul | - |
dc.contributor.author | Chen, Xiaoshuang | - |
dc.date.accessioned | 2023-12-11T06:35:04Z | - |
dc.date.available | 2023-12-11T06:35:04Z | - |
dc.date.created | 2020-05-19 | - |
dc.date.issued | 2017 | - |
dc.identifier.citation | RSC Advances, Vol.7 No.81, pp.51744-51749 | - |
dc.identifier.issn | 2046-2069 | - |
dc.identifier.uri | https://hdl.handle.net/10371/198371 | - |
dc.description.abstract | An ultrasensitive, fast response and self-powered photodetector would be preferable in practical applications. In this paper, we report fast response, high photosensitivity and self-powered Fe doped TiO2 (Fe: TiO2)/n-Si UV-visible detectors via a facile solution process. As-fabricated devices exhibited excellent photoresponse properties, including high responsivity of 46 mA W-1 (350 nm) and 60 mA W-1 (600 nm) with 0.5 mW cm(-2) light irradiation under zero bias, as well as an ultrasensitive (on/off ratio up to 103), fast (rise/decay time of < 10/15 ms), and broad-band (UV-visible) photodetection with no or low external energy supply. Furthermore, the quantum efficiency of the heterojunction rose up beyond 100% with a broad wavelength range at a small reverse bias of -0.5 V. The self-power originated from the existence of a built-in electric field between Fe: TiO2 and Si that helps facilitate the separation of photogenerated electron-hole pairs and regulate the electron transport. Capacitance-voltage (C-V) measurements of Fe: TiO2/n-Si devices also confirmed the existence of the built-in electric field. Such Fe: TiO2/n-Si heterojunction photodetectors might be potentially useful for relative applications with weak-signal fast detection in the UV-visible band. | - |
dc.language | 영어 | - |
dc.publisher | Royal Society of Chemistry | - |
dc.title | Self-powered UV-visible photodetector with fast response and high photosensitivity employing an Fe:TiO2/n-Si heterojunction | - |
dc.type | Article | - |
dc.identifier.doi | 10.1039/c7ra10439a | - |
dc.citation.journaltitle | RSC Advances | - |
dc.identifier.wosid | 000414780700075 | - |
dc.identifier.scopusid | 2-s2.0-85033474409 | - |
dc.citation.endpage | 51749 | - |
dc.citation.number | 81 | - |
dc.citation.startpage | 51744 | - |
dc.citation.volume | 7 | - |
dc.description.isOpenAccess | Y | - |
dc.contributor.affiliatedAuthor | Yi, Gyu-Chul | - |
dc.type.docType | Article | - |
dc.description.journalClass | 1 | - |
dc.subject.keywordPlus | PHOTOCATALYTIC ACTIVITY | - |
dc.subject.keywordPlus | ULTRAVIOLET PHOTODETECTORS | - |
dc.subject.keywordPlus | NANOROD ARRAY | - |
dc.subject.keywordPlus | HETEROSTRUCTURES | - |
dc.subject.keywordPlus | PHOTORESPONSE | - |
dc.subject.keywordPlus | FILM | - |
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