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Molecular Weight Tuning of Organic Semiconductors for Curved Organic–Inorganic Hybrid X‐Ray Detectors

Curved X‐ray detectors have the potential to revolutionize diverse sectors due to benefits such as reduced image distortion and vignetting compared to their planar counterparts. While the use of inorganic semiconductors for curved detectors are restricted by their brittle nature, organic–inorganic h...

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Autores principales: Nanayakkara, M. Prabodhi A., Masteghin, Mateus G., Basiricò, Laura, Fratelli, Ilaria, Ciavatti, Andrea, Kilbride, Rachel C., Jenatsch, Sandra, Webb, Thomas, Richheimer, Filipe, Wood, Sebastian, Castro, Fernando A., Parnell, Andrew J., Fraboni, Beatrice, Jayawardena, K. D. G. Imalka, Silva, S. Ravi P.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: John Wiley and Sons Inc. 2021
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8805550/
https://www.ncbi.nlm.nih.gov/pubmed/34755497
http://dx.doi.org/10.1002/advs.202101746
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author Nanayakkara, M. Prabodhi A.
Masteghin, Mateus G.
Basiricò, Laura
Fratelli, Ilaria
Ciavatti, Andrea
Kilbride, Rachel C.
Jenatsch, Sandra
Webb, Thomas
Richheimer, Filipe
Wood, Sebastian
Castro, Fernando A.
Parnell, Andrew J.
Fraboni, Beatrice
Jayawardena, K. D. G. Imalka
Silva, S. Ravi P.
author_facet Nanayakkara, M. Prabodhi A.
Masteghin, Mateus G.
Basiricò, Laura
Fratelli, Ilaria
Ciavatti, Andrea
Kilbride, Rachel C.
Jenatsch, Sandra
Webb, Thomas
Richheimer, Filipe
Wood, Sebastian
Castro, Fernando A.
Parnell, Andrew J.
Fraboni, Beatrice
Jayawardena, K. D. G. Imalka
Silva, S. Ravi P.
author_sort Nanayakkara, M. Prabodhi A.
collection PubMed
description Curved X‐ray detectors have the potential to revolutionize diverse sectors due to benefits such as reduced image distortion and vignetting compared to their planar counterparts. While the use of inorganic semiconductors for curved detectors are restricted by their brittle nature, organic–inorganic hybrid semiconductors which incorporated bismuth oxide nanoparticles in an organic bulk heterojunction consisting of poly(3‐hexylthiophene‐2,5‐diyl) (P3HT) and [6,6]‐phenyl C71 butyric acid methyl ester (PC(70)BM) are considered to be more promising in this regard. However, the influence of the P3HT molecular weight on the mechanical stability of curved, thick X‐ray detectors remains less well understood. Herein, high P3HT molecular weights (>40 kDa) are identified to allow increased intermolecular bonding and chain entanglements, resulting in X‐ray detectors that can be curved to a radius as low as 1.3 mm with low deviation in X‐ray response under 100 repeated bending cycles while maintaining an industry‐standard dark current of <1 pA mm(−2) and a sensitivity of ≈ 0.17 μC Gy(−1) cm(−2). This study identifies a crucial missing link in the development of curved detectors, namely the importance of the molecular weight of the polymer semiconductors used.
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spelling pubmed-88055502022-02-04 Molecular Weight Tuning of Organic Semiconductors for Curved Organic–Inorganic Hybrid X‐Ray Detectors Nanayakkara, M. Prabodhi A. Masteghin, Mateus G. Basiricò, Laura Fratelli, Ilaria Ciavatti, Andrea Kilbride, Rachel C. Jenatsch, Sandra Webb, Thomas Richheimer, Filipe Wood, Sebastian Castro, Fernando A. Parnell, Andrew J. Fraboni, Beatrice Jayawardena, K. D. G. Imalka Silva, S. Ravi P. Adv Sci (Weinh) Research Articles Curved X‐ray detectors have the potential to revolutionize diverse sectors due to benefits such as reduced image distortion and vignetting compared to their planar counterparts. While the use of inorganic semiconductors for curved detectors are restricted by their brittle nature, organic–inorganic hybrid semiconductors which incorporated bismuth oxide nanoparticles in an organic bulk heterojunction consisting of poly(3‐hexylthiophene‐2,5‐diyl) (P3HT) and [6,6]‐phenyl C71 butyric acid methyl ester (PC(70)BM) are considered to be more promising in this regard. However, the influence of the P3HT molecular weight on the mechanical stability of curved, thick X‐ray detectors remains less well understood. Herein, high P3HT molecular weights (>40 kDa) are identified to allow increased intermolecular bonding and chain entanglements, resulting in X‐ray detectors that can be curved to a radius as low as 1.3 mm with low deviation in X‐ray response under 100 repeated bending cycles while maintaining an industry‐standard dark current of <1 pA mm(−2) and a sensitivity of ≈ 0.17 μC Gy(−1) cm(−2). This study identifies a crucial missing link in the development of curved detectors, namely the importance of the molecular weight of the polymer semiconductors used. John Wiley and Sons Inc. 2021-11-10 /pmc/articles/PMC8805550/ /pubmed/34755497 http://dx.doi.org/10.1002/advs.202101746 Text en © 2021 The Authors. Advanced Science published by Wiley‐VCH GmbH https://creativecommons.org/licenses/by/4.0/This is an open access article under the terms of the http://creativecommons.org/licenses/by/4.0/ (https://creativecommons.org/licenses/by/4.0/) License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.
spellingShingle Research Articles
Nanayakkara, M. Prabodhi A.
Masteghin, Mateus G.
Basiricò, Laura
Fratelli, Ilaria
Ciavatti, Andrea
Kilbride, Rachel C.
Jenatsch, Sandra
Webb, Thomas
Richheimer, Filipe
Wood, Sebastian
Castro, Fernando A.
Parnell, Andrew J.
Fraboni, Beatrice
Jayawardena, K. D. G. Imalka
Silva, S. Ravi P.
Molecular Weight Tuning of Organic Semiconductors for Curved Organic–Inorganic Hybrid X‐Ray Detectors
title Molecular Weight Tuning of Organic Semiconductors for Curved Organic–Inorganic Hybrid X‐Ray Detectors
title_full Molecular Weight Tuning of Organic Semiconductors for Curved Organic–Inorganic Hybrid X‐Ray Detectors
title_fullStr Molecular Weight Tuning of Organic Semiconductors for Curved Organic–Inorganic Hybrid X‐Ray Detectors
title_full_unstemmed Molecular Weight Tuning of Organic Semiconductors for Curved Organic–Inorganic Hybrid X‐Ray Detectors
title_short Molecular Weight Tuning of Organic Semiconductors for Curved Organic–Inorganic Hybrid X‐Ray Detectors
title_sort molecular weight tuning of organic semiconductors for curved organic–inorganic hybrid x‐ray detectors
topic Research Articles
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8805550/
https://www.ncbi.nlm.nih.gov/pubmed/34755497
http://dx.doi.org/10.1002/advs.202101746
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