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High sensitivity organic inorganic hybrid X ray detectors with direct transduction and broadband response

Thirimanne, Hashini, Jayawardena, K, Parnell, A, Bandara, R, Karalasingam, A, Pani, Silvia, Huerdler, J, Lidzey, D, Tedde, S, Nisbet, Andrew , Mills, Chris and Silva, Ravi (2018) High sensitivity organic inorganic hybrid X ray detectors with direct transduction and broadband response Nature Communications, 9, 2926.

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Abstract

X-ray detectors are critical to healthcare diagnostics, cancer therapy and homeland security, with many potential uses limited by system cost and/or detector dimensions. Current X-ray detector sensitivities are limited by the bulk X-ray attenuation of the materials and consequently necessitate thick crystals (~ 1 mm – 1 cm), resulting in rigid structure, high operational voltages and high cost. Here we present a disruptive, flexible, low cost, broad-band, and high sensitivity direct X-ray transduction technology produced by embedding high atomic number bismuth oxide nanoparticles in an organic bulk heterojunction. These hybrid detectors demonstrate sensitivities of 1712 µC mGy-1 cm-3 for “soft” X-rays and ~30 and 58 µC mGy-1 cm-3 under 6 and 15 MV “hard” X-rays generated from a medical linear accelerator; strongly competing with the current solid state detectors, all achieved at low bias voltages (-10 V) and low power, enabling detector operation powered by coin cell batteries.

Item Type: Article
Divisions : Faculty of Engineering and Physical Sciences > Electronic Engineering
Authors :
NameEmailORCID
Thirimanne, Hashinih.thirimanne@surrey.ac.uk
Jayawardena, K
Parnell, A
Bandara, R
Karalasingam, A
Pani, SilviaS.Pani@surrey.ac.uk
Huerdler, J
Lidzey, D
Tedde, S
Nisbet, AndrewA.Nisbet@surrey.ac.uk
Mills, ChrisC.Mills@surrey.ac.uk
Silva, RaviS.Silva@surrey.ac.uk
Date : 26 July 2018
Funders : Leverhulme Trust; EPSRC
DOI : 10.1038/s41467-018-05301-6
Copyright Disclaimer : Copyright 2018 The Author(s)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/.
Depositing User : Melanie Hughes
Date Deposited : 02 Aug 2018 13:58
Last Modified : 06 Jul 2019 05:25
URI: http://epubs.surrey.ac.uk/id/eprint/848616

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