X-Ray Detector-on-Plastic with High Sensitivity Using Low Cost, Solution-Processed Organic Photodiodes
article
We made and characterized an X-ray detector on a 25-ìm-thick plastic substrate that is capable of medicalgrade 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/mm2 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 μGy/frame. cop. 2015 IEEE.
Topics
TNO Identifier
534090
ISSN
00189383
Source
IEEE Transactions on Electron Devices, 63(1), pp. 197-204.
Publisher
Institute of Electrical and Electronics Engineers Inc.
Article nr.
7117383
Pages
197-204
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