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GaInAs 4th Junction for Next-Generation Lattice-Mismatched Multijunction Solar Cells [PDF]

, 2006
Friedman, D. J., Geisz, J. F., Kurtz, S. R., Norman, A. G., Wanlass, M.   +4 more
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Graded Recombination Layers for Multijunction Photovoltaics

Nano Letters, 2012
Multijunction devices consist of a stack of semiconductor junctions having bandgaps tuned across a broad spectrum. In solar cells this concept is used to increase the efficiency of photovoltaic harvesting, while light emitters and detectors use it to achieve multicolor and spectrally tunable behavior.
Koleilat, Ghada I., Wang, Xihua, Sargent, Edward H.   +2 more
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Efficiency of multijunction photovoltaic systems

2008 33rd IEEE Photovolatic Specialists Conference, 2008
In this paper, an expression for the PV system efficiency is derived that can be used in conjunction with measured device performance and detailed numerical modeling to analyze PV system performance. Such an analysis will help identify design trade-offs and also help to identify which system and cell design changes will be of greatest benefit to the ...
J. L. Gray, A. W. Haas, J. R. Wilcox, R. J. Schwartz   +3 more
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Multijunction organic photovoltaics with a broad spectral response

Physical Chemistry Chemical Physics, 2012
We demonstrate series-integrated multijunction organic photovoltaics fabricated monolithically by vapor-deposition in a transposed subcell order with the near-infrared-absorbing subcell in front of the green-absorbing subcell. This transposed subcell order is enabled by the highly complementary absorption spectra of a near-infrared-absorbing visibly ...
Jill A, Macko, Richard R, Lunt, Timothy P, Osedach, Patrick R, Brown, Miles C, Barr, Karen K, Gleason, Vladimir, Bulovic   +6 more
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Optimization tool for multijunction photovoltaic systems

2014 IEEE 40th Photovoltaic Specialist Conference (PVSC), 2014
The choice of individual bandgaps is important for achieving the maximum efficiency of a multijunction photovoltaic system. The optimization tool described in this paper uses a multijunction photovoltaic (PV) model and determines the bandgap energies that yield the highest possible system power efficiency for a given number of PV junctions.
Kevon C. Charles, John R. Wilcox, Jeffery L. Gray   +2 more
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High Efficiency Multijunction Photovoltaic Development

Industrial & Engineering Chemistry Research, 2012
Photovoltaic energy conversion has demonstrated remarkable improvements in performance over the past 60 years. The rate of solar cell efficiency change has actually increased over the past 20 years as researchers have moved beyond elemental semiconductors to increasingly more sophisticated materials and devices. In addition, significant improvements in
David Wilt, Mark Stan
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Peak efficiency of multijunction photovoltaic systems

2010 35th IEEE Photovoltaic Specialists Conference, 2010
The maximum efficiency of multijunction photovoltaic systems is determined for independently connected solar cells that are optically in series. The maximum efficiency is computed as a function of solar concentration using both the Shockley-Queisser detailed balance radiative limit for the reverse saturation current density and a simple empirical ...
J. L. Gray, J. M. Schwarz, J. R. Wilcox, A. W. Haas, R. J. Schwartz   +4 more
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A cassegrain concentrator photovoltaic system: Comparison between dichroic and multijunction photovoltaic configurations

IECON 2014 - 40th Annual Conference of the IEEE Industrial Electronics Society, 2014
In the present paper a novel configuration of high concentrator photovoltaic (HCPV) systems based on Cassegrain optics has been presented. The proposed system has been designed in order to be suitable for the implementation of both multi-junction and spectrum splitting configurations. The Cassegrain optic design, the components and material choices for
Vincenzi D, Baricordi S, Calabrese S, MUSIO, MAURA, DAMIANO, ALFONSO   +4 more
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The design of multijunction photovoltaic systems for realistic operating conditions

2013 IEEE 56th International Midwest Symposium on Circuits and Systems (MWSCAS), 2013
The design of a multijunction photovoltaic system, particularly the choice of the individual bandgaps, is sensitive to the specific operating conditions of the system. Laboratory characterization is typically carried out at a standard temperature, such as 25 °C, using a standard solar spectrum, such as an AM1.5 direct spectrum.
Jeffery L. Gray, John R. Wilcox
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Towards commercialization of concentrator multijunction photovoltaic modules

2008 33rd IEEE Photovoltaic Specialists Conference, 2008
Concentrating photovoltaic (CPV) modules occupy the middle ground between conventional, flat-plate photovoltaics and concentrating solar power (CSP) technologies. CPV promises to deliver the best of both worlds: the highest efficiency of any photovoltaic system combined with the higher capacity factor and scale-up potential of dual-axis tracking ...
G. S. Kinsey, R. A. Sherif, P. Pien, P. Hebert, R. R. King, D. Aldrich   +5 more
openaire   +1 more source