Figure 4

Current-voltage characteristics and gamma response for the Frisch grid detector fabricated from an as-grown CZTS ingot at room temperature. (a) Dark I–V characteristics of the detector sample at room temperature, (b) Detector response (energy resolution at 662 keV) at different shaping times, (c) Pulse height spectrum for the Frisch grid detector from a ¹³⁷Cs source, the inset shows the photograph of the detector, (d) Pulse height spectrum for the Frisch grid detector for a ²²Na source, (e) Zoomed version of the same spectrum to enhance the high energy peak, (f) Pulse height spectrum for the Frisch grid detector for a ¹³³Ba source, (g) Zoomed version of the same spectrum to enhance the high energy peaks, and (h) Pulse height spectrum for the Frisch grid detector for a ⁶⁰Co source showing very well resolved high energy gamma lines at energies of ~1.17 MeV and 1.33 MeV. The detector dimensions are: ~4.5 × 4.5 × 10.8 mm³.