Szukana fraza: [Abstrakt = "Quantum well solar cell with GaAs wells and AlxGa1–xAs barriers was optimized. Particular emphasis was placed on enhancing the efficiency. Open\-circuit voltage, short\-circuit current density, fill factor have been also optimized. Many simulations of various structures were carried out. The conversion efficiency exceeding 27% was obtained. The algorithm of structures optimization that gives comprehensive information about solar cells parameters in a short time was shown. Spectral characteristics, efficiency of energy conversion as a function of light concentration, temperature and the geometrical and materials parameters of the solar cells structures were determined. These results are compared with nearly identical p\-i\-n solar cells\: i\) the first with i\-region made from undoped GaAs \(well material\) and ii\) the second with i\-region from Al0.1Ga0.9As \(barrier material\)."]

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