Fig. 3: The models and equivalent circuits of Ring Electrode (RE) and Center Electrode (CE).
From: On-chip solar power source for self-powered smart microsensors in bulk CMOS process
a The on-chip solar cell with a large square ring electrode in the N+ region. b Equivalent circuit of the on-chip solar cell with large square ring electrode. c The on-chip solar cell with a small central electrode in the N+ region. d The equivalent circuit of the on-chip solar cell with a central electrode.
