Solar cells, modeling photocurrent density

The solar cell is the basic unit of the photovoltaic generator. The solar cell is the device that transforms the sun s rays or photons directly into electricity. There are various models of solar cells made with different technologies available in the market today. These models have varying electrical and physical characteristics depending on the manufacturer. The photocurrent generated by a solar cell under illumination at short circuit is dependent on the incident light. To relate the photocurrent density, to the incident spectrum, we need the cell s quantum efficiency (QE). QE (E) is the probability that an incident photon of energy E will deliver one electron to the external circuit. Then,... 

Figure 1.1 Simple equivalent circuit (top) for modeling solar cell current-voltage characteristics and energy level diagram (bottom) mapping the various charge transfer processes in a DSSC to the current pathways of the model circuit. The dominant mechanisms are described by a current density Jl induced upon photoexcitation and electron injection into the conduction band of the metal oxide semiconductor surface MO, linear (Jsh) and nonlinear (/jj) reverse current densities in parallel with photocurrent source and a series resistance to account for electrode and ionic resistances. In Section 1.2.2 M0 = Ti02, Sn02, X = Br, I.

---