Thermal Annealing Of Metal-Semiconductor Contact For Czt Detectors
2007 IEEE NUCLEAR SCIENCE SYMPOSIUM CONFERENCE RECORD, VOLS 1-11(2007)
Abstract
CZT can be used for high-resolution X-ray and y - ray spectroscopy at room temperature. Previously thermal annealing process has been studied to decrease the leakage current of the detector and obtain the stable detector performance. Because of its low work function, indium can be used as the metal contact for CZT Schottky detector. The low temperature annealing effect on In/CZT contact was studied in our work. A CZT Schottky detector with indium/CZT/gold structure was fabricated. The leakage current and the energy resolution of each detector were measured. The detector was annealed for 10 hours in vacuum, and for 2, 4, 8 hours in air. The leakage current and the energy resolution of the detector were measured after the annealing process and they were compared with the data before the annealing. It was found that the detector performance of CZT Schottky detector was enhanced with the low temperature annealing process in air.
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Key words
x ray spectroscopy,leakage current,work function,room temperature,gamma ray spectroscopy,annealing,thermal annealing,schottky diodes
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