The third book of four-volume edition of “Solar Cells” is devoted to solar cells based on silicon wafers, ., the main material used in today's photovoltaics. Single-crystalline Si (c-Si) modules are among the most efficient but at the same time the most expensive since they require the highest purity silicon and involve a lot of stages of complicated processes in their manufacture. Polycrystalline silicon (mc-Si) cells are less expensive to produce solar cells but are less efficient. As a result, cost per unit of generated electric power for c-Si and mc-Si modules is practically equal
