ABSTRACT
The underlying principles behind semiconductors in general, and photovoltaic cells in particular, are presented in this chapter. The physics of these devices is far more complicated than the simplified descriptions given here, and those who need an indepth study should consult the textbooks and papers in scientific journals. A single short chapter, such as this is, cannot do justice to such a complex field. However, it can present the fundamentals needed to appreciate the state of-the-art in photovoltaics, and define the promise of high efficiency with third generation PV cells.
