The Effect of Graded Band Gap Structure Inserted in the Multijunction Solar Cell

Hassane Ben slimane, A. Hemani, A. Helmaoui, B. Dennai

Abstract


We have theoretically calculated the photovoltaic conversion efficiency of a monolithic dual-graded junction AlGaAs/GaInAs device, which can be experimentally fabricated. By optimizing the band-gap combination of the considered structure, an improvement of conversion efficiency has been observed in comparison to the conventional AlGaAs/GaInAs system. For the suggested graded band-gap combination, our calculation indicates that the attainable efficiency can be enhanced up to 34% ( AM1.5d).

Keywords: band gap gradient, multijunction solar cells, AlGaAs, GaInAs


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ISSN (Paper)2224-3232 ISSN (Online)2225-0573

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