HOW PHOTO VOLTAIC CELL WORK

1) A typical silicon PV cell is composed of the following:
     - A thin wafer of silicon doped with phosphorus: (n-type) silicon.
     - A thicker layer of silicon doped with boron: (p-type) silicon.
     - An electrical field created  where these two materials are in contact, called the p-n junction.

2) A typical silicon PV cell produces about 0.5–0.6 volt DC under open-circuit, no-load conditions.

3) The current (and power) output of a PV cell depends on:
     - Cell efficiency.
     - Cell size (surface area).
     - The intensity of sunlight striking the surface of the cell.