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Graphene/semi-insulating single crystal CdTe Schottky-type heterojunction X- and γ-Ray Radiation Detectors

We developed a new concept of X- and γ-ray radiation semiconductor detectors based on a large area graphene/semi-insulating single crystal CdTe Schottky-type heterojunction. These two terminal electronic devices can be easily fabricated by forming a Van der Waals contact between large area chemical...

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Autores principales: Brus, V. V., Maslyanchuk, O. L., Solovan, M. M., Maryanchuk, P. D., Fodchuk, I., Gnatyuk, V. A., Vakhnyak, N. D., Melnychuk, S. V., Aoki, T.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group UK 2019
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6355853/
https://www.ncbi.nlm.nih.gov/pubmed/30705310
http://dx.doi.org/10.1038/s41598-018-37637-w
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author Brus, V. V.
Maslyanchuk, O. L.
Solovan, M. M.
Maryanchuk, P. D.
Fodchuk, I.
Gnatyuk, V. A.
Vakhnyak, N. D.
Melnychuk, S. V.
Aoki, T.
author_facet Brus, V. V.
Maslyanchuk, O. L.
Solovan, M. M.
Maryanchuk, P. D.
Fodchuk, I.
Gnatyuk, V. A.
Vakhnyak, N. D.
Melnychuk, S. V.
Aoki, T.
author_sort Brus, V. V.
collection PubMed
description We developed a new concept of X- and γ-ray radiation semiconductor detectors based on a large area graphene/semi-insulating single crystal CdTe Schottky-type heterojunction. These two terminal electronic devices can be easily fabricated by forming a Van der Waals contact between large area chemical vapor deposited graphene and CdTe substrates in air and at room temperature. This approach significantly reduces the fabrication cost and improves the reproducibility and stability of electrical properties. A detailed analysis of their AC and DC electrical properties was carried out in order to determine the width of the space charge region and dominant charge transport mechanisms at reverse bias. The unoptimized graphene/CdTe heterojunction detectors exhibited a promising spectral resolution of (241)Am (59 keV) and (137)Cs (662 keV) isotope radiation at room temperature.
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spelling pubmed-63558532019-02-01 Graphene/semi-insulating single crystal CdTe Schottky-type heterojunction X- and γ-Ray Radiation Detectors Brus, V. V. Maslyanchuk, O. L. Solovan, M. M. Maryanchuk, P. D. Fodchuk, I. Gnatyuk, V. A. Vakhnyak, N. D. Melnychuk, S. V. Aoki, T. Sci Rep Article We developed a new concept of X- and γ-ray radiation semiconductor detectors based on a large area graphene/semi-insulating single crystal CdTe Schottky-type heterojunction. These two terminal electronic devices can be easily fabricated by forming a Van der Waals contact between large area chemical vapor deposited graphene and CdTe substrates in air and at room temperature. This approach significantly reduces the fabrication cost and improves the reproducibility and stability of electrical properties. A detailed analysis of their AC and DC electrical properties was carried out in order to determine the width of the space charge region and dominant charge transport mechanisms at reverse bias. The unoptimized graphene/CdTe heterojunction detectors exhibited a promising spectral resolution of (241)Am (59 keV) and (137)Cs (662 keV) isotope radiation at room temperature. Nature Publishing Group UK 2019-01-31 /pmc/articles/PMC6355853/ /pubmed/30705310 http://dx.doi.org/10.1038/s41598-018-37637-w Text en © The Author(s) 2019 Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/.
spellingShingle Article
Brus, V. V.
Maslyanchuk, O. L.
Solovan, M. M.
Maryanchuk, P. D.
Fodchuk, I.
Gnatyuk, V. A.
Vakhnyak, N. D.
Melnychuk, S. V.
Aoki, T.
Graphene/semi-insulating single crystal CdTe Schottky-type heterojunction X- and γ-Ray Radiation Detectors
title Graphene/semi-insulating single crystal CdTe Schottky-type heterojunction X- and γ-Ray Radiation Detectors
title_full Graphene/semi-insulating single crystal CdTe Schottky-type heterojunction X- and γ-Ray Radiation Detectors
title_fullStr Graphene/semi-insulating single crystal CdTe Schottky-type heterojunction X- and γ-Ray Radiation Detectors
title_full_unstemmed Graphene/semi-insulating single crystal CdTe Schottky-type heterojunction X- and γ-Ray Radiation Detectors
title_short Graphene/semi-insulating single crystal CdTe Schottky-type heterojunction X- and γ-Ray Radiation Detectors
title_sort graphene/semi-insulating single crystal cdte schottky-type heterojunction x- and γ-ray radiation detectors
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6355853/
https://www.ncbi.nlm.nih.gov/pubmed/30705310
http://dx.doi.org/10.1038/s41598-018-37637-w
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