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dc.contributor.author소홍윤-
dc.date.accessioned2021-09-27T05:15:03Z-
dc.date.available2021-09-27T05:15:03Z-
dc.date.issued2020-03-
dc.identifier.citationSENSORS AND ACTUATORS A-PHYSICAL, v. 303, article no. 111783en_US
dc.identifier.issn0924-4247-
dc.identifier.urihttps://www.sciencedirect.com/science/article/pii/S0924424719314682?via%3Dihub-
dc.identifier.urihttps://repository.hanyang.ac.kr/handle/20.500.11754/165152-
dc.description.abstractThis study aims to enhance the optical sensitivity of gallium nitride ultraviolet (UV) photodetectors at low temperatures using a multifunctional microlens with ring-shaped structures. This dual-surface lens with ring-shaped structures (i.e., DSLR), a unique microlens, was fabricated by employing a curable polymer and three-dimensional printed mold, and it has two primary regions: An upper and a lower region. The upper region of the DSLR serves as a smooth lens surface to focus the incident UV rays by delaying frost formation at low temperatures. The lower region captures condensed water droplets, thus allowing for only local frost formation. When compared to a photodetector without the DSLR, the photodetector covered by the DSLR generated a higher photocurrent at low temperatures (corresponding to a similar to 13.85% increase in generated photocurrent in the temperature range of -20 degrees C to -1.2 degrees C). Thus, the findings of this study support the use of a facile, cost-effective, and multifunctional dual-surface polymer lens for higher-sensitivity UV detection in various low-temperature environments, such as the Arctic, outer space, and the environment within cryostats. (C) 2019 Elsevier B.V. All rights reserved.en_US
dc.description.sponsorshipThis work was supported by the National Research Foundation of Korea (NRF), granted financial resource from the Ministry of Education of the Republic of Korea (No. NRF-2018R1D1A1B07051411).en_US
dc.language.isoenen_US
dc.publisherELSEVIER SCIENCE SAen_US
dc.subjectDual-surface;en_US
dc.subjectRing-shaped structuresen_US
dc.subjectMicrolensen_US
dc.subjectGallium nitrideen_US
dc.subjectPhotodetectoren_US
dc.subjectLow temperatureen_US
dc.titleDual-surface lens with ring-shaped structures for optical tuning of GaN ultraviolet photodetectors at low temperatureen_US
dc.typeArticleen_US
dc.relation.volume303-
dc.identifier.doi10.1016/j.sna.2019.111783-
dc.relation.page1-7-
dc.relation.journalSENSORS AND ACTUATORS A-PHYSICAL-
dc.contributor.googleauthorShin, Sanghun-
dc.contributor.googleauthorKang, Beomchan-
dc.contributor.googleauthorSo, Hongyun-
dc.relation.code2020046535-
dc.sector.campusS-
dc.sector.daehakCOLLEGE OF ENGINEERING[S]-
dc.sector.departmentDIVISION OF MECHANICAL ENGINEERING-
dc.identifier.pidhyso-
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COLLEGE OF ENGINEERING[S](공과대학) > MECHANICAL ENGINEERING(기계공학부) > Articles
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