Abstract
A 1-kWp ( peak at 100 mw/cm2 incident power dencity ) concentrating photovoltaic array with 180 square Presnel plastic lenses and AlGaAs/GaAs concentrator solar cells has been constructed. The AlGaAs/GaAs concetrator solar cells consist of p-AlGaAs/p-GaAs/ n-GaAs with an area of 2 × 2 cm2. The 2 × 2 cm2 concentrator cells are obtained by a new liquid phase epitaxial growth technique, which treats a large quantity of large area (∼24 cm2 ) wafers at one batch. The p-GaAs layer thickness is set at 3–5 μn so as to keep the spreading resistance low. The concentrator cells are passively cooled by natural convection. The maximum output power from the best concentrator cell is 9.1 W. The array output power of 977 W ( Isc= 8.4 A, Voc=184 V, FF=0.632 ) has been obtained at about 125 suns.
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