Buechele P, Richter M, Tedde SF, Matt G, Ankah GN, Fischer R, Biele M, Metzger W, Lilliu S, Bikondoa O, Macdonald JE, Brabec C, Kraus T, Lemmer U, Schmidt O (2015)
Publication Language: English
Publication Status: Published
Publication Type: Journal article, Original article
Publication year: 2015
Publisher: Nature Publishing Group
Book Volume: 9
Pages Range: 843-848
Journal Issue: 12
Medical X-ray imaging requires cost-effective and high-resolution flat-panel detectors for the energy range between 20 and 120€...keV. Solution-processed photodetectors provide the opportunity to fabricate detectors with a large active area at low cost. Here, we present a disruptive approach that improves the resolution of such detectors by incorporating terbium-doped gadolinium oxysulfide scintillator particles into an organic photodetector matrix. The X-ray induced light emission from the scintillators is absorbed within hundreds of nanometres, which is negligible compared with the pixel size. Hence, optical crosstalk, a limiting factor in the resolution of scintillator-based X-ray detectors, is minimized. The concept is validated with a 256 × 256 pixel detector with a resolution of 4.75€...lp mm '1 at a MTF = 0.2, significantly better than previous stacked scintillator-based flat-panel detectors. We achieved a resolution that proves the feasibility of solution-based detectors in medical applications. Time-resolved electrical characterization showed enhanced charge carrier mobility with increased scintillator filling, which is explained by morphological changes.
APA:
Buechele, P., Richter, M., Tedde, S.F., Matt, G., Ankah, G.N., Fischer, R.,... Schmidt, O. (2015). X-ray imaging with scintillator-sensitized hybrid organic photodetectors. Nature Photonics, 9(12), 843-848. https://doi.org/10.1038/nphoton.2015.216
MLA:
Buechele, Patric, et al. "X-ray imaging with scintillator-sensitized hybrid organic photodetectors." Nature Photonics 9.12 (2015): 843-848.
BibTeX: Download