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

Detalhes bibliográficos
Autor(a) principal: Kumar, Dinesh
Data de Publicação: 2020
Outros Autores: Gomes, Tiago Carneiro [UNESP], Alves, Neri [UNESP], Fugikawa-Santos, Lucas, Smith, Graham C., Kettle, Jeff
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Institucional da UNESP
Texto Completo: http://dx.doi.org/10.1109/JSEN.2020.2983418
http://hdl.handle.net/11449/201955
Resumo: A 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.
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spelling UV Phototransistors-Based upon Spray Coated and Sputter Deposited ZnO TFTsdetectorFlexibleradio frequency sputteringspray coatingTFTultraviolet lightZnOA 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.School of Electronics Bangor UniversitySchool of Technology and Sciences São Paulo State University (Unesp)Institute of Geosciences and Exact Sciences São Paulo State University (Unesp) Rio ClaroFaculty of Science and Engineering University of ChesterSchool of Technology and Sciences São Paulo State University (Unesp)Institute of Geosciences and Exact Sciences São Paulo State University (Unesp) Rio ClaroBangor UniversityUniversidade Estadual Paulista (Unesp)University of ChesterKumar, DineshGomes, Tiago Carneiro [UNESP]Alves, Neri [UNESP]Fugikawa-Santos, LucasSmith, Graham C.Kettle, Jeff2020-12-12T02:46:10Z2020-12-12T02:46:10Z2020-07-15info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/article7532-7539http://dx.doi.org/10.1109/JSEN.2020.2983418IEEE Sensors Journal, v. 20, n. 14, p. 7532-7539, 2020.1558-17481530-437Xhttp://hdl.handle.net/11449/20195510.1109/JSEN.2020.29834182-s2.0-850880158757607651111619269Scopusreponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPengIEEE Sensors Journalinfo:eu-repo/semantics/openAccess2024-06-19T12:44:50Zoai:repositorio.unesp.br:11449/201955Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462024-08-05T22:20:24.383384Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false
dc.title.none.fl_str_mv UV Phototransistors-Based upon Spray Coated and Sputter Deposited ZnO TFTs
title UV Phototransistors-Based upon Spray Coated and Sputter Deposited ZnO TFTs
spellingShingle UV Phototransistors-Based upon Spray Coated and Sputter Deposited ZnO TFTs
Kumar, Dinesh
detector
Flexible
radio frequency sputtering
spray coating
TFT
ultraviolet light
ZnO
title_short UV Phototransistors-Based upon Spray Coated and Sputter Deposited ZnO TFTs
title_full UV Phototransistors-Based upon Spray Coated and Sputter Deposited ZnO TFTs
title_fullStr UV Phototransistors-Based upon Spray Coated and Sputter Deposited ZnO TFTs
title_full_unstemmed UV Phototransistors-Based upon Spray Coated and Sputter Deposited ZnO TFTs
title_sort UV Phototransistors-Based upon Spray Coated and Sputter Deposited ZnO TFTs
author Kumar, Dinesh
author_facet Kumar, Dinesh
Gomes, Tiago Carneiro [UNESP]
Alves, Neri [UNESP]
Fugikawa-Santos, Lucas
Smith, Graham C.
Kettle, Jeff
author_role author
author2 Gomes, Tiago Carneiro [UNESP]
Alves, Neri [UNESP]
Fugikawa-Santos, Lucas
Smith, Graham C.
Kettle, Jeff
author2_role author
author
author
author
author
dc.contributor.none.fl_str_mv Bangor University
Universidade Estadual Paulista (Unesp)
University of Chester
dc.contributor.author.fl_str_mv Kumar, Dinesh
Gomes, Tiago Carneiro [UNESP]
Alves, Neri [UNESP]
Fugikawa-Santos, Lucas
Smith, Graham C.
Kettle, Jeff
dc.subject.por.fl_str_mv detector
Flexible
radio frequency sputtering
spray coating
TFT
ultraviolet light
ZnO
topic detector
Flexible
radio frequency sputtering
spray coating
TFT
ultraviolet light
ZnO
description A 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.
publishDate 2020
dc.date.none.fl_str_mv 2020-12-12T02:46:10Z
2020-12-12T02:46:10Z
2020-07-15
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
dc.type.driver.fl_str_mv info:eu-repo/semantics/article
format article
status_str publishedVersion
dc.identifier.uri.fl_str_mv http://dx.doi.org/10.1109/JSEN.2020.2983418
IEEE Sensors Journal, v. 20, n. 14, p. 7532-7539, 2020.
1558-1748
1530-437X
http://hdl.handle.net/11449/201955
10.1109/JSEN.2020.2983418
2-s2.0-85088015875
7607651111619269
url http://dx.doi.org/10.1109/JSEN.2020.2983418
http://hdl.handle.net/11449/201955
identifier_str_mv IEEE Sensors Journal, v. 20, n. 14, p. 7532-7539, 2020.
1558-1748
1530-437X
10.1109/JSEN.2020.2983418
2-s2.0-85088015875
7607651111619269
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv IEEE Sensors Journal
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv 7532-7539
dc.source.none.fl_str_mv Scopus
reponame:Repositório Institucional da UNESP
instname:Universidade Estadual Paulista (UNESP)
instacron:UNESP
instname_str Universidade Estadual Paulista (UNESP)
instacron_str UNESP
institution UNESP
reponame_str Repositório Institucional da UNESP
collection Repositório Institucional da UNESP
repository.name.fl_str_mv Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)
repository.mail.fl_str_mv
_version_ 1808129417053995008

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