Radiation damage in flexible TFTs and organic detectors
Autor(a) principal: | |
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Data de Publicação: | 2015 |
Tipo de documento: | Dissertação |
Idioma: | eng |
Título da fonte: | Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
Texto Completo: | http://hdl.handle.net/10362/16369 |
Resumo: | In this thesis was investigated the radiation hardness of the building blocks of a future flexible X-ray sensor system. The characterized building blocks for the pixel addressing and signal amplification electronics are high mobility semiconducting oxide transistors (HMSO-TFTs) and organic transistors (OTFTs), whereas the photonic detection system is based on organic semiconducting single crystals (OSSCs). TFT parameters such as mobility, threshold voltage and subthreshold slope were measured as function of cumulative X-ray dose. Instead for OSSCs conductivity and X-ray sensitivity were analysed after various radiation steps. The results show that ionizing radiation does not lead to degradation in HMSO-TFTs. Instead OTFTs show instability in mobility which is reduced up to 73% for doses of 1 kGy. OSSC demonstrate stable detector properties for the tested total dose range. As conclusion, HMSO-TFTs and OSSCs can be readily employed in the X-ray detector system allowing operation for total doses exceeding 1 kGy of ionizing radiation. |
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Radiation damage in flexible TFTs and organic detectorsX-raysOSSCsHMSO-TFTsOTFTsRadiation hardnessDomínio/Área Científica::Engenharia e Tecnologia::Engenharia dos MateriaisIn this thesis was investigated the radiation hardness of the building blocks of a future flexible X-ray sensor system. The characterized building blocks for the pixel addressing and signal amplification electronics are high mobility semiconducting oxide transistors (HMSO-TFTs) and organic transistors (OTFTs), whereas the photonic detection system is based on organic semiconducting single crystals (OSSCs). TFT parameters such as mobility, threshold voltage and subthreshold slope were measured as function of cumulative X-ray dose. Instead for OSSCs conductivity and X-ray sensitivity were analysed after various radiation steps. The results show that ionizing radiation does not lead to degradation in HMSO-TFTs. Instead OTFTs show instability in mobility which is reduced up to 73% for doses of 1 kGy. OSSC demonstrate stable detector properties for the tested total dose range. As conclusion, HMSO-TFTs and OSSCs can be readily employed in the X-ray detector system allowing operation for total doses exceeding 1 kGy of ionizing radiation.Cramer, TobiasBarquinha, PedroRUNAlmeida, Maria Teresa Gonçalves Lobato de2016-02-02T17:17:46Z2015-092016-012015-09-01T00:00:00Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/masterThesisapplication/pdfhttp://hdl.handle.net/10362/16369enginfo:eu-repo/semantics/openAccessreponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãoinstacron:RCAAP2024-03-11T03:53:02Zoai:run.unl.pt:10362/16369Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-20T03:23:07.018388Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãofalse |
dc.title.none.fl_str_mv |
Radiation damage in flexible TFTs and organic detectors |
title |
Radiation damage in flexible TFTs and organic detectors |
spellingShingle |
Radiation damage in flexible TFTs and organic detectors Almeida, Maria Teresa Gonçalves Lobato de X-rays OSSCs HMSO-TFTs OTFTs Radiation hardness Domínio/Área Científica::Engenharia e Tecnologia::Engenharia dos Materiais |
title_short |
Radiation damage in flexible TFTs and organic detectors |
title_full |
Radiation damage in flexible TFTs and organic detectors |
title_fullStr |
Radiation damage in flexible TFTs and organic detectors |
title_full_unstemmed |
Radiation damage in flexible TFTs and organic detectors |
title_sort |
Radiation damage in flexible TFTs and organic detectors |
author |
Almeida, Maria Teresa Gonçalves Lobato de |
author_facet |
Almeida, Maria Teresa Gonçalves Lobato de |
author_role |
author |
dc.contributor.none.fl_str_mv |
Cramer, Tobias Barquinha, Pedro RUN |
dc.contributor.author.fl_str_mv |
Almeida, Maria Teresa Gonçalves Lobato de |
dc.subject.por.fl_str_mv |
X-rays OSSCs HMSO-TFTs OTFTs Radiation hardness Domínio/Área Científica::Engenharia e Tecnologia::Engenharia dos Materiais |
topic |
X-rays OSSCs HMSO-TFTs OTFTs Radiation hardness Domínio/Área Científica::Engenharia e Tecnologia::Engenharia dos Materiais |
description |
In this thesis was investigated the radiation hardness of the building blocks of a future flexible X-ray sensor system. The characterized building blocks for the pixel addressing and signal amplification electronics are high mobility semiconducting oxide transistors (HMSO-TFTs) and organic transistors (OTFTs), whereas the photonic detection system is based on organic semiconducting single crystals (OSSCs). TFT parameters such as mobility, threshold voltage and subthreshold slope were measured as function of cumulative X-ray dose. Instead for OSSCs conductivity and X-ray sensitivity were analysed after various radiation steps. The results show that ionizing radiation does not lead to degradation in HMSO-TFTs. Instead OTFTs show instability in mobility which is reduced up to 73% for doses of 1 kGy. OSSC demonstrate stable detector properties for the tested total dose range. As conclusion, HMSO-TFTs and OSSCs can be readily employed in the X-ray detector system allowing operation for total doses exceeding 1 kGy of ionizing radiation. |
publishDate |
2015 |
dc.date.none.fl_str_mv |
2015-09 2015-09-01T00:00:00Z 2016-02-02T17:17:46Z 2016-01 |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/masterThesis |
format |
masterThesis |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://hdl.handle.net/10362/16369 |
url |
http://hdl.handle.net/10362/16369 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
application/pdf |
dc.source.none.fl_str_mv |
reponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação instacron:RCAAP |
instname_str |
Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação |
instacron_str |
RCAAP |
institution |
RCAAP |
reponame_str |
Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
collection |
Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
repository.name.fl_str_mv |
Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação |
repository.mail.fl_str_mv |
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1799137868373819392 |