Abstract
The efficiency of a solar cell can be increased by stacking multiple solar cells with a range of bandgap energies, resulting in a multijunction solar cell with a maximum the oretical efficiency limit of 86.8% III–V compound semiconductors are good candidates for fabricating such multijunction solar cells for two reasons: they can be grown with excellent material quality; and their bandgaps span a wide spectral range, mostly with direct bandgaps, implying a high absorption coefficient. These factors are the reason for the success of this technology, which has achieved 39% efficiency, the highest solar-to-electric conversion efficiency of any photovoltaic device to date. This article explores the materials science of today’s high-efficiency multijunction cells and describes challenges associated with new materials developments and how they may lead to next-generation, multijunction solar cell concepts.
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References
G. Hering, Photon Int. (July 2005) p. 50.
R.R. King, D.C. Law, C.M. Fetzer, R.A. Sherif, K.M. Edmondson, S. Kurtz, G.S. Kinsey, H.L. Cotal, D.D. Krut, J.H. Ermer, and N.H. Karam, Proc. 20th Eur. Photovoltaic Solar Energy Conf. (Barcelona, Spain, 2005) p. 118.
S.G. Bailey, R. Raffaelle, and K. Emery, Prog. Photovolt. Res. Appl. 10 (2002) p. 399.
W. Shockley and H.J. Queisser, J. Appl. Phys. 32 (1961) p. 510.
A. Marti and G.L. Araujo, Sol. Energy Mater. Sol. Cells 43 (1996) p. 203.
A.S. Brown and M.A. Green, Prog. Photovolt. Res. Appl. 10 (2002) p. 299.
W.B. Shockley and W.T.J. Read, Phys. Rev. 87 (5) (1952) p. 835.
F. Dimroth, Phys. Status Solidi C 3 (3) (2006) p. 373.
A.W. Bett, C. Baur, F. Dimroth, J. Schöne, Mater. Res. Soc. Symp. Proc. 836 (2005) L6.4.1.
M. Wanlass, P. Ahrenkiel, D. Albin, J. Carapella, A. Duda, K. Emery, D. Friedman, J. Geisz, K. Jones, A. Kibbler, J. Kiehl, S. Kurtz, W. McMahon, T. Moriarty, J. Olson, A. Ptak, M. Romero, and S. Ward, Proc. WCPEC-4 (Waikoloa, Hawaii, 2006) p. 729.
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Dimroth, F., Kurtz, S. High-Efficiency Multijunction Solar Cells. MRS Bulletin 32, 230–235 (2007). https://doi.org/10.1557/mrs2007.27
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DOI: https://doi.org/10.1557/mrs2007.27