Main focus of this work is to prove the feasibility to apply organic photodiodes (OPDs) for medical and industrial applications. The realization of a flat panel X-ray digital imager prototype with the integration of OPDs on top of an amorphous silicon thin film transistor backplane with 256x256 pixels represents the highlight of this thesis. Performances comparable with a commercial available flat panel X-Ray detector based on silicon have been achieved. Furthermore, a new pixel architecture based on the active pixel concept is presented. A better signal to noise ratio for the active pixels compared to the passive pixels is demonstrated.
OPDs are realizable by a simple and low temperature spray-coating process in ambient conditions. In comparison to standard techniques, spray-coating, has revealed to be the most versatile and the best in terms of device performances.
The mechanical characterization of flexible OPDs is reported showing that the current voltage characteristic do not show evident changes in the bent state.
A fully characterization of large area OPDs show that active area upscaling is possible without affecting the performance of the devices. Active areas up to 2.65 cm² are reported.
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Main focus of this work is to prove the feasibility to apply organic photodiodes (OPDs) for medical and industrial applications. The realization of a flat panel X-ray digital imager prototype with the integration of OPDs on top of an amorphous silicon thin film transistor backplane with 256x256 pixels represents the highlight of this thesis. Performances comparable with a commercial available flat panel X-Ray detector based on silicon have been achieved. Furthermore, a new pixel architecture bas...
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