Journal
CURRENT APPLIED PHYSICS
Volume 6, Issue 3, Pages 288-292Publisher
ELSEVIER
DOI: 10.1016/j.cap.2005.11.001
Keywords
photoconductors; large area X-ray detectors; X-ray sensitivity; charge transport and trapping; a-Se; HgI2
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Recent research on flat panel X-ray image detectors has shown their potential for replacing existing X-ray film/screen cassettes and capturing X-ray images electronically, thus enabling the clinical transition to digital radiography. The present work examines the imaging properties of a number of potential X-ray photoconductors for these new X-ray image detectors. The X-ray sensitivity is discussed in terms of the absorption efficiency, electron-hole pair creation energy (ionization energy), and charge transport and trapping limited collection efficiency. X-ray photoconductor properties of various semiconductors are compared and critically discussed with special attention to stabilized a-Se and HgI2, currently the most promising materials. (c) 2006 Elsevier B.V. All rights reserved.
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