Characterization of polycrystalline lead oxide for application in direct conversion X-ray detectors

Abstract While polycrystalline lead oxide (poly-PbO) is known to be one of the most promising photoconductors for utilization in X-ray detectors, its major performance parameters such as charge yield and mobility-lifetime product (μτ) are still not well established and require further investigation....

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Autores principales:	O. Semeniuk, O. Grynko, G. Decrescenzo, G. Juska, K. Wang, A. Reznik
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2017
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/78f6e1ca8d1245b1b47020fd3d5e48d4
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spelling	oai:doaj.org-article:78f6e1ca8d1245b1b47020fd3d5e48d42021-12-02T12:32:52ZCharacterization of polycrystalline lead oxide for application in direct conversion X-ray detectors10.1038/s41598-017-09168-32045-2322https://doaj.org/article/78f6e1ca8d1245b1b47020fd3d5e48d42017-08-01T00:00:00Zhttps://doi.org/10.1038/s41598-017-09168-3https://doaj.org/toc/2045-2322Abstract While polycrystalline lead oxide (poly-PbO) is known to be one of the most promising photoconductors for utilization in X-ray detectors, its major performance parameters such as charge yield and mobility-lifetime product (μτ) are still not well established and require further investigation. Combining the conventional X-ray induced photocurrent and pulse height spectroscopy techniques we examine the X-ray photogeneration and recombination processes in poly-PbO. The measurements indicate that the amount of energy required to release a single electron hole pair W ± (inverse of charge yield) strongly depends on applied electric field and at 10 V/μm reaches ~20 eV/ehp. Fitting the measured pulse height spectra with the Hecht formula provided μτ for holes and electrons to be 4.1 × 10−8 cm2/V and 10−9 cm2/V, respectively. Obtained μτ values combined with recently reported mobility values of charge carriers in PbO suggest a new direction towards improvement of PbO technology by incorporation of Frisch grid or X-ray transistor architectures.O. SemeniukO. GrynkoG. DecrescenzoG. JuskaK. WangA. ReznikNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 7, Iss 1, Pp 1-10 (2017)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q O. Semeniuk O. Grynko G. Decrescenzo G. Juska K. Wang A. Reznik Characterization of polycrystalline lead oxide for application in direct conversion X-ray detectors
description	Abstract While polycrystalline lead oxide (poly-PbO) is known to be one of the most promising photoconductors for utilization in X-ray detectors, its major performance parameters such as charge yield and mobility-lifetime product (μτ) are still not well established and require further investigation. Combining the conventional X-ray induced photocurrent and pulse height spectroscopy techniques we examine the X-ray photogeneration and recombination processes in poly-PbO. The measurements indicate that the amount of energy required to release a single electron hole pair W ± (inverse of charge yield) strongly depends on applied electric field and at 10 V/μm reaches ~20 eV/ehp. Fitting the measured pulse height spectra with the Hecht formula provided μτ for holes and electrons to be 4.1 × 10−8 cm2/V and 10−9 cm2/V, respectively. Obtained μτ values combined with recently reported mobility values of charge carriers in PbO suggest a new direction towards improvement of PbO technology by incorporation of Frisch grid or X-ray transistor architectures.
format	article
author	O. Semeniuk O. Grynko G. Decrescenzo G. Juska K. Wang A. Reznik
author_facet	O. Semeniuk O. Grynko G. Decrescenzo G. Juska K. Wang A. Reznik
author_sort	O. Semeniuk
title	Characterization of polycrystalline lead oxide for application in direct conversion X-ray detectors
title_short	Characterization of polycrystalline lead oxide for application in direct conversion X-ray detectors
title_full	Characterization of polycrystalline lead oxide for application in direct conversion X-ray detectors
title_fullStr	Characterization of polycrystalline lead oxide for application in direct conversion X-ray detectors
title_full_unstemmed	Characterization of polycrystalline lead oxide for application in direct conversion X-ray detectors
title_sort	characterization of polycrystalline lead oxide for application in direct conversion x-ray detectors
publisher	Nature Portfolio
publishDate	2017
url	https://doaj.org/article/78f6e1ca8d1245b1b47020fd3d5e48d4
work_keys_str_mv	AT osemeniuk characterizationofpolycrystallineleadoxideforapplicationindirectconversionxraydetectors AT ogrynko characterizationofpolycrystallineleadoxideforapplicationindirectconversionxraydetectors AT gdecrescenzo characterizationofpolycrystallineleadoxideforapplicationindirectconversionxraydetectors AT gjuska characterizationofpolycrystallineleadoxideforapplicationindirectconversionxraydetectors AT kwang characterizationofpolycrystallineleadoxideforapplicationindirectconversionxraydetectors AT areznik characterizationofpolycrystallineleadoxideforapplicationindirectconversionxraydetectors
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Characterization of polycrystalline lead oxide for application in direct conversion X-ray detectors

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