Disclosed is a radiation imaging system comprising a layer for a radiation converter a top electrode on the layer for a radiation converter and an array of pixel unit electrically coupled to the layer for a radiation converter wherein, said layer for a radiation converter comprises an organic matrix comprising a charge transport material (CTM) and scintillating particles for absorbing radiation, being dispersed in the organic matrix, wherein the scintillating particles are in contact with a charge generation material (CGM).
