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Modeling Multiple Quantum Well and Superlattice Solar Cells

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DOI: 10.4236/nr.2013.43030    4,418 Downloads   6,754 Views   Citations

ABSTRACT

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.

Conflicts of Interest

The authors declare no conflicts of interest.

Cite this paper

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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