Fig. 1. Structural diagram of cross sectional pixels of 4T-PPD-APS

Fig. 2. Physical model of pinned photodiode structure

Fig. 3. Caculation model for simulation. (a) Model I; (b) model II

Fig. 4. Net deposition energy versus incident γ-ray energy

Fig. 5. Nephogram of incident photon density distribution. (a) Vertical incidence; (b) incidence with an angle of 45°

Fig. 6. Meshes of typical photon response events with 137Cs γ-rays. (a) Weak response; (b)strong response

Fig. 7. Meshes of typical photon response events with 60Co γ-rays under different dose rates. (a) 5.2 Gy·h-1; (b) 21.4 Gy·h-1; (c) 29.3 Gy·h-1; (d) 69.2 Gy·h-1; (e) 87.8 Gy·h-1; (f) 128.4 Gy·h-1; (g) 155.4 Gy·h-1; (h) 173.4 Gy·h-1; (i) 186.9 Gy·h-1; (j) 216.0 Gy·h-1; (k) 299.0 Gy·h-1; (l) 276.0 Gy·h-1

Table 1. Simulated results of single photon energy deposition in pixels