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High-Performance and Self-Powered Alternating Current Ultraviolet Photodetector for Digital Communication
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dc.contributor.authorKumar, Mohit-
dc.contributor.authorPark, Ji Yong-
dc.contributor.authorSeo, Hyungtak-
dc.date.issued2021-03-17-
dc.identifier.issn1944-8252-
dc.identifier.urihttps://aurora.ajou.ac.kr/handle/2018.oak/31937-
dc.identifier.urihttps://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85103228937&origin=inward-
dc.description.abstractSelf-powered ultraviolet photodetectors offer great potential in the field of optical communication, smart security, space exploration, and others; however, achieving high sensitivity with maintaining fast response speed has remained a daunting challenge. Here, we develop a titanium dioxide-based self-powered ultraviolet photodetector with high detectivity (≈1.8 × 1010 jones) and a good photoresponsivity of 0.32 mA W-1 under pulsed illumination (λ = 365 nm, 4 mW cm-2), which demonstrate an enhancement of 114 and 2017%, respectively, due to the alternating current photovoltaic effect compared to the conventional direct current photovoltaic effect. Further, the photodetector demonstrated a high on/off ratio (≈103), an ultrafast rise/decay time of 112/63 μs, and a noise equivalent power of 5.01 × 10-11 W/Hz1/2 under self-biased conditions. Photoconductive atomic force microscopy revealed the nanoscale charge transport and offered the possibility to scale down the device size to a sub-10-nanometer (∼35 nm). Moreover, as one of the practical applications, the device was successfully utilized to interpret the digital codes. The presented results enlighten a new path to design energy-efficient ultrafast photodetectors not only for the application of optical communication but also for other advanced optoelectronic applications such as digital display, sensing, and others.-
dc.description.sponsorshipThis study was supported by the National Research Foundation of Korea (NRF-2018R1D1A1B07049871 and NRF-2019R1A2C2003804) of the Ministry of Science and ICT, Republic of Korea. This work was also supported by Ajou University.-
dc.language.isoeng-
dc.publisherAmerican Chemical Society-
dc.subject.meshAlternating current-
dc.subject.meshAtomic-force-microscopy-
dc.subject.meshDigital communications-
dc.subject.meshHigh-performing-
dc.subject.meshPerformance-
dc.subject.meshPhotoconductive atomic force microscopy-
dc.subject.meshSecurity space-
dc.subject.meshSelf-powered-
dc.subject.meshUltra-fast-
dc.subject.meshUltra-violet photodetectors-
dc.titleHigh-Performance and Self-Powered Alternating Current Ultraviolet Photodetector for Digital Communication-
dc.typeArticle-
dc.citation.endPage12249-
dc.citation.number10-
dc.citation.startPage12241-
dc.citation.titleACS Applied Materials and Interfaces-
dc.citation.volume13-
dc.identifier.bibliographicCitationACS Applied Materials and Interfaces, Vol.13 No.10, pp.12241-12249-
dc.identifier.doi10.1021/acsami.1c00698-
dc.identifier.pmid33683094-
dc.identifier.scopusid2-s2.0-85103228937-
dc.identifier.urlhttp://pubs.acs.org/journal/aamick-
dc.subject.keyworddigital communication-
dc.subject.keywordhigh-performing-
dc.subject.keywordphotoconductive atomic force microscopy-
dc.subject.keywordself-powered-
dc.subject.keywordultraviolet photodetectors-
dc.type.otherArticle-
dc.identifier.pissn1944-8244-
dc.description.isoafalse-
dc.subject.subareaMaterials Science (all)-
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