a Cross section of the digital X-ray detector-on-foil. A solution-processed BHJ organic photodetector frontplane with p-type polymer donor (orange) and small molecule n-type acceptor (blue) is integrated on top of an IGZO TFT backplane. b Band diagram of the OPD frontplane. For the OPD active blend, only the energy levels of the HOMO of PCDTBT (5.4 eV) and LUMO of PCBM (3.8 eV) are shown. c Prototype of curved image sensor. d Bendable Hamamatsu FSS 600 CsI scintillator.