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Boosting Self-Powered Ultraviolet Photoresponse of TiO2-Based Heterostructure by Flexo-Phototronic Effects
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dc.contributor.authorKumar, Mohit-
dc.contributor.authorPark, Ji Yong-
dc.contributor.authorSeo, Hyungtak-
dc.date.issued2022-05-01-
dc.identifier.issn2195-1071-
dc.identifier.urihttps://aurora.ajou.ac.kr/handle/2018.oak/32605-
dc.identifier.urihttps://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85126889245&origin=inward-
dc.description.abstractUltraviolet photodetectors have long been used as key elements for various applications, including optical sensing and communication. However, accurate sensing of weak UV intensities under self-powered conditions with stable photocurrent and rapid temporal response remains critical because of challenges related to having suitable band alignment and strong junction quality. Here, an enhancement in the self-power ultraviolet (UV, λ = 365 nm) photoresponse of the silver nanowires/TiO2 Schottky photodetector is demonstrated by taking advantage of the flexoelectric phenomenon. The device does not show measurable photocurrent under self-biased conditions with low-intensity (200 µW cm–2) UV illumination, whereas a significant photocurrent of about 0.48 µA is measured by integrating the photovoltaic and flexo-phototronic effects. Additionally, rise/fall times improved from 300/1068 to 43/165 µs by utilizing the flexo-phototronic effects, depicting an enhancement of 597%. Further, remarkable responsivity of 124 mA W–1 and high detectivity of 6.5 × 1011 Jones under self-biased conditions are recorded. Moreover, microscopic evidence of flexoelectric effect modulated photoresponse is provided by photoconductive atomic force microscopy measurements. High efficiency and self-powered capability demonstrated in this study are likely to inspire the development of next-generation ultrafast, energy-efficient, and sophisticated photodetectors for communication, imaging, and sensing networks.-
dc.description.sponsorshipThis study was supported through the National Research Foundation of Korea [NRF\u20102018R1D1A1B07049871 and NRF\u20102019R1A2C2003804] of the Ministry of Science and ICT, Republic of Korea. This work was also supported by Ajou University.-
dc.language.isoeng-
dc.publisherJohn Wiley and Sons Inc-
dc.subject.meshAtomic-force-microscopy-
dc.subject.meshFlexo-phototronic effect-
dc.subject.meshHigh performance-
dc.subject.meshPerformance-
dc.subject.meshPhotoconductive atomic force microscopy-
dc.subject.meshPhotoresponses-
dc.subject.meshSelf-biased-
dc.subject.meshSelf-biased device-
dc.subject.meshSelf-powered-
dc.subject.meshUV photoresponse-
dc.titleBoosting Self-Powered Ultraviolet Photoresponse of TiO2-Based Heterostructure by Flexo-Phototronic Effects-
dc.typeArticle-
dc.citation.number10-
dc.citation.titleAdvanced Optical Materials-
dc.citation.volume10-
dc.identifier.bibliographicCitationAdvanced Optical Materials, Vol.10 No.10-
dc.identifier.doi2-s2.0-85126889245-
dc.identifier.scopusid2-s2.0-85126889245-
dc.identifier.urlhttp://onlinelibrary.wiley.com/journal/10.1002/(ISSN)2195-1071-
dc.subject.keywordflexo-phototronic effect-
dc.subject.keywordhigh performance-
dc.subject.keywordphotoconductive atomic force microscopy-
dc.subject.keywordphotodetectors-
dc.subject.keywordself-biased devices-
dc.subject.keywordUV photoresponse-
dc.type.otherArticle-
dc.description.isoafalse-
dc.subject.subareaElectronic, Optical and Magnetic Materials-
dc.subject.subareaAtomic and Molecular Physics, and Optics-
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KUMARMOHITKumar, Mohit
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