Mercuric iodide thick films for radiological x-ray detectors

Michael M. Schieber; Haim Hermon; Robert A. Street; Steve E. Ready; Asaf Zuck; Alexander I. Vilensky; Leonid Melekhov; Rubil Shatunovsky; Michael Lukach; Evgenie Meerson; Yehezkel Saado; Eithan Pinkhasy

doi:10.1117/12.410563

18 December 2000 Mercuric iodide thick films for radiological x-ray detectors

Michael M. Schieber, Haim Hermon, Robert A. Street, Steve E. Ready, Asaf Zuck, Alexander I. Vilensky, Leonid Melekhov, Rubil Shatunovsky, Michael Lukach, Evgenie Meerson, Yehezkel Saado, Eithan Pinkhasy

Author Affiliations +

Proceedings Volume 4142, Penetrating Radiation Systems and Applications II; (2000) https://doi.org/10.1117/12.410563
Event: International Symposium on Optical Science and Technology, 2000, San Diego, CA, United States

Abstract

For the first time polycrystalline HgI₂ photoconductor material directly evaporated on a-Si array for direct conversion of x-rays for imaging purposes, were successfully imaged at Xerox-Palo Alto Research Center. The initial results are very promising and show a high x-ray sensitivity and low leakage current. Since Ti-W alloys are used as pixel electrodes, an intermediate passivation layer must be used to prevent a chemical reaction with the detector plate. The thickness that these Polycrystalline HgI₂ thick film detectors have been fabricated until now is up to 1,800 micrometers , which makes them useful also for high energy applications. The characterization of the Polycrystalline HgI₂ thick films deposited with or without the passivation layers by measuring their dark currents, sensitivity to 65 and 85 kVp x-rays and residual signals after 1 minute of biasing, will be shown for several detectors. Some preliminary results will be shown for some novel screen-printed HgI₂ detectors.

Citation Download Citation

Michael M. Schieber, Haim Hermon, Robert A. Street, Steve E. Ready, Asaf Zuck, Alexander I. Vilensky, Leonid Melekhov, Rubil Shatunovsky, Michael Lukach, Evgenie Meerson, Yehezkel Saado, and Eithan Pinkhasy "Mercuric iodide thick films for radiological x-ray detectors", Proc. SPIE 4142, Penetrating Radiation Systems and Applications II, (18 December 2000); https://doi.org/10.1117/12.410563

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