Photovoltaic Concept

• Semiconductors with appropriate dopants provide directionality for electron flow in the vicinity of the pn junction .
• The interface between n and p-type regions in a pn junction can absorb light over a wider range of photon energies and drive the electrons in one direction and the holes in the other direction.
• Types and structures of photovoltaic cells.

Photovoltaic Installations

• Analysis.
• Estimate of the area and cost required to supply all of the electrical energy needs of the US: readable , and presentation versions.
• Concentrated PV.