Small-dose-sensitive X-ray image pixel with HgI2 photoconductor and amorphous oxide thin-film transistor

Abstract

A new X-ray image sensor is demonstrated with an oxide thin-film transistor backplane and HgI2 sensing material. It displays outstanding image quality under a low X-ray exposure and a low electric field. It is promising as a state-of-the-art device to realize highly resolved images at a low X-ray dose for a variety of medical X-ray imaging applications.

Keywords: X-ray absorption; image sensors,photoconductive materials; thin-film transistors.