Solar energy, in one form or another, is the source of nearly all energy on the Earth. Moreover, it is the most plentiful and almost inexhaustible. Photovoltaics (PV), as a technology that directly converts sun light into electricity, is a promising approach to solve the steadily increasing world electricity demand. As the third generation PV technology, Concentrator photovoltaics (CPV) is one of the most promising technologies to reduce the cost of solar electricity. Using multijunction sola...
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