X-ray detector-on-plastic with high sensitivity using low cost, solution-processed organic photodiodes

G. Gelinck, A. Kumar, D. Moet, J.L. van der Steen, A.J.J.M. ven Breemen, S. Shanmugam, Arjan Langen, J. Gilot, P. Groen, R. Andriessen, M. Simon, W. Ruetten, Alexander U. Douglas, Rob Raaijmakers, P.E. Malinowski, K. Myny

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81 Citations (Scopus)
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Abstract

We made and characterized an X-ray detector on a 25- \mu text{m} -thick plastic substrate that is capable of medical-grade performance. As an indirect conversion flat panel detector, it combined a standard scintillator with an organic photodetector (OPD) layer and oxide thin-film transistor backplane. Using solution-processed organic bulk heterojunction photodiode rather than the usual amorphous silicon, process temperature is reduced to be compatible with plastic film substrates, and a number of costly lithography steps are eliminated, opening the door to lower production costs. With dark currents as low as 1 pA/mm ^{2} and sensitivity of 0.2 A/W the OPD also meets functional requirements: the proof-of-concept detector delivers high-resolution, dynamic images at 10 frames/s, and 200 pixels/in using X-ray doses as low as 3~\mu Gy/frame
Original languageEnglish
Pages (from-to)197-204
JournalIEEE Transactions on Electron Devices
Volume63
Issue number1
DOIs
Publication statusPublished - 2016

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