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Tissue Equivalent Curved Organic X-ray Detectors Utilizing High Atomic Number Polythiophene Analogues.
Nanayakkara, M Prabodhi A; He, Qiao; Ruseckas, Arvydas; Karalasingam, Anushanth; Matjacic, Lidija; Masteghin, Mateus G; Basiricò, Laura; Fratelli, Ilaria; Ciavatti, Andrea; Kilbride, Rachel C; Jenatsch, Sandra; Parnell, Andrew J; Fraboni, Beatrice; Nisbet, Andrew; Heeney, Martin; Jayawardena, K D G Imalka; Silva, S Ravi P.
Afiliación
  • Nanayakkara MPA; Advanced Technology Institute, Department of Electrical and Electronic Engineering, University of Surrey, Guildford, Surrey, GU2 7XH, UK.
  • He Q; Department of Chemistry and Centre for Processable Electronics, Imperial College London, White City Campus, London, W12 0BZ, UK.
  • Ruseckas A; School of Physics & Astronomy, University of St Andrews, Physical Science Building, North Haugh, St Andrews, UK.
  • Karalasingam A; Sri Lanka Institute of Nanotechnology, Pitipana - Thalagala Rd, Homagama, Sri Lanka.
  • Matjacic L; National Physical Laboratory, Teddington, Middlesex, TW11 0LW, UK.
  • Masteghin MG; Advanced Technology Institute, Department of Electrical and Electronic Engineering, University of Surrey, Guildford, Surrey, GU2 7XH, UK.
  • Basiricò L; Department of Physics and Astronomy, University of Bologna, Viale Berti Pichat 6/2, Bologna, 40127, Italy.
  • Fratelli I; National Institute for Nuclear Physics, INFN Section of Bologna, Bologna, Italy.
  • Ciavatti A; Department of Physics and Astronomy, University of Bologna, Viale Berti Pichat 6/2, Bologna, 40127, Italy.
  • Kilbride RC; National Institute for Nuclear Physics, INFN Section of Bologna, Bologna, Italy.
  • Jenatsch S; Department of Physics and Astronomy, University of Bologna, Viale Berti Pichat 6/2, Bologna, 40127, Italy.
  • Parnell AJ; National Institute for Nuclear Physics, INFN Section of Bologna, Bologna, Italy.
  • Fraboni B; Department of Chemistry, University of Sheffield, Dainton Building, Sheffield, S3 7HF, UK.
  • Nisbet A; FLUXiM AG, Katharina-Sulzer-Platz 2, Winterthur, 8400, Switzerland.
  • Heeney M; Department of Physics and Astronomy, University of Sheffield, Hicks Building, Sheffield, S3 7RH, UK.
  • Jayawardena KDGI; Department of Physics and Astronomy, University of Bologna, Viale Berti Pichat 6/2, Bologna, 40127, Italy.
  • Silva SRP; National Institute for Nuclear Physics, INFN Section of Bologna, Bologna, Italy.
Adv Sci (Weinh) ; 10(35): e2304261, 2023 Dec.
Article en En | MEDLINE | ID: mdl-37916896
Organic semiconductors are a promising material candidate for X-ray detection. However, the low atomic number (Z) of organic semiconductors leads to poor X-ray absorption thus restricting their performance. Herein, the authors propose a new strategy for achieving high-sensitivity performance for X-ray detectors based on organic semiconductors modified with high -Z heteroatoms. X-ray detectors are fabricated with p-type organic semiconductors containing selenium heteroatoms (poly(3-hexyl)selenophene (P3HSe)) in blends with an n-type fullerene derivative ([6,6]-Phenyl C71 butyric acid methyl ester (PC70 BM). When characterized under 70, 100, 150, and 220 kVp X-ray radiation, these heteroatom-containing detectors displayed a superior performance in terms of sensitivity up to 600 ± 11 nC Gy-1  cm-2 with respect to the bismuth oxide (Bi2 O3 ) nanoparticle (NP) sensitized organic detectors. Despite the lower Z of selenium compared to the NPs typically used, the authors identify a more efficient generation of electron-hole pairs, better charge transfer, and charge transport characteristics in heteroatom-incorporated detectors that result in this breakthrough detector performance. The authors also demonstrate flexible X-ray detectors that can be curved to a radius as low as 2 mm with low deviation in X-ray response under 100 repeated bending cycles while maintaining an industry-standard ultra-low dark current of 0.03 ± 0.01 pA mm-2 .
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: Adv Sci (Weinh) Año: 2023 Tipo del documento: Article Pais de publicación: Alemania
Texto completo
Añadir a Mi BVS
Imprimir
XML
PubMed Links
Buscar en Google

Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: Adv Sci (Weinh) Año: 2023 Tipo del documento: Article Pais de publicación: Alemania