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Modeling Multiple Quantum Well and Superlattice Solar Cells

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DOI: 10.4236/nr.2013.43030    4,338 Downloads   6,671 Views   Citations


The inability of a single-gap solar cell to absorb energies less than the band-gap energy is one of the intrinsic loss mechanisms which limit the conversion efficiency in photovoltaic devices. New approaches to ultra-high efficiency solar cells include devices such as multiple quantum wells (QW) and superlattices (SL) systems in the intrinsic region of a p-i-n cell of wider band-gap energy (barrier or host) semiconductor. These configurations are intended to extend the absorption band beyond the single gap host cell semiconductor. A theoretical model has been developed to study the performance of the strain-balanced GaAsP/InGaAs/GaAs MQWSC, and GaAs/GaInNAs MQWSC or SLSC. Our results show that conversion efficiencies can be reached which have never been obtained before for a single-junction solar cell.

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The authors declare no conflicts of interest.

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C. Cabrera, J. Rimada, M. Courel, L. Hernandez, J. Connolly, A. Enciso and D. Contreras-Solorio, "Modeling Multiple Quantum Well and Superlattice Solar Cells," Natural Resources, Vol. 4 No. 3, 2013, pp. 235-245. doi: 10.4236/nr.2013.43030.


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