Abstract
carriers, thus limiting energy resolution and efficiency. A Frisch-Grid configuration helps to solve this problem. This research is focused on optimizing the Frisch-grid configuration for a CZTS detector. The CZTS was grown by traveling heater method. Infrared images of the CZTS matrix largely showed the absence of tellurium inclusions. The resistivity of the CZTS obtained from a current-voltage plot is of the order of 1010 Ω.cm. The charge-transport characterized by measuring the electron mobility-lifetime product is 4.7 × 10-3 cm2/V. Detector resolution was measured for various Frisch-ring widths. For a 4.8 × 4.9 × 9.7 mm3 detector, the best Frisch-ring widths were found to be 3-4 mm. A detector resolution of 1.35% full-width-at-half-maximum was obtained for the 3-mm width at -2300 V bias voltage for the 662-keV gamma peak of 137Cs. A resolution of 1.36% was obtained for the 4-mm width at -1800 V applied bias.
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