UV Phototransistors-Based upon Spray Coated and Sputter Deposited ZnO TFTs

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dc.contributor.authorKumar, Dinesh
dc.contributor.authorGomes, Tiago Carneiro [UNESP]
dc.contributor.authorAlves, Neri [UNESP]
dc.contributor.authorFugikawa-Santos, Lucas
dc.contributor.authorSmith, Graham C.
dc.contributor.authorKettle, Jeff
dc.contributor.institutionBangor University
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.contributor.institutionUniversity of Chester
dc.date.accessioned2020-12-12T02:46:10Z
dc.date.available2020-12-12T02:46:10Z
dc.date.issued2020-07-15
dc.description.abstractA comparison of Zinc Oxide (ZnO) phototransistors prepared by spray and sputter coating process is presented. The work shows that spray coated layers provide significant advantages in sensor response over ZnO phototransistors made by physical vapour deposition and we show that spray deposited ZnO phototransistors can exhibit state-of-the-art performances for UV photodetectors. Topographic images of the samples surface shows that there is increase in surface roughness in spray coated samples indicating increasing grain sizes, which is considered the source of the greater sensor responsivity. X-ray photoelectron spectroscopy (XPS) is also used to understand the root cause of the greater UV responsivity. It was observed that sprayed ZnO TFTs are more sensitive to UV radiation due to higher adsorption of oxygen level. Responsivity and external quantum efficiency (EQE) of the sprayed and sputtered ZnO TFTs are also evaluated.en
dc.description.affiliationSchool of Electronics Bangor University
dc.description.affiliationSchool of Technology and Sciences São Paulo State University (Unesp)
dc.description.affiliationInstitute of Geosciences and Exact Sciences São Paulo State University (Unesp) Rio Claro
dc.description.affiliationFaculty of Science and Engineering University of Chester
dc.description.affiliationUnespSchool of Technology and Sciences São Paulo State University (Unesp)
dc.description.affiliationUnespInstitute of Geosciences and Exact Sciences São Paulo State University (Unesp) Rio Claro
dc.format.extent7532-7539
dc.identifierhttp://dx.doi.org/10.1109/JSEN.2020.2983418
dc.identifier.citationIEEE Sensors Journal, v. 20, n. 14, p. 7532-7539, 2020.
dc.identifier.doi10.1109/JSEN.2020.2983418
dc.identifier.issn1558-1748
dc.identifier.issn1530-437X
dc.identifier.lattes7607651111619269
dc.identifier.scopus2-s2.0-85088015875
dc.identifier.urihttp://hdl.handle.net/11449/201955
dc.language.isoeng
dc.relation.ispartofIEEE Sensors Journal
dc.sourceScopus
dc.subjectdetector
dc.subjectFlexible
dc.subjectradio frequency sputtering
dc.subjectspray coating
dc.subjectTFT
dc.subjectultraviolet light
dc.subjectZnO
dc.titleUV Phototransistors-Based upon Spray Coated and Sputter Deposited ZnO TFTsen
dc.typeArtigo
unesp.author.lattes7607651111619269
unesp.author.orcid0000-0003-3149-6929[1]
unesp.author.orcid0000-0002-0340-7530[2]
unesp.author.orcid0000-0001-7376-2717[4]
unesp.author.orcid0000-0002-1245-5286[6]

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