Metamorphic and Lattice-Matched Solar Cells Under Concentration

King, Richard R.; Law, D. C.; Edmondson, K.; Fetzer, C. M.; Sherif, R.A.; Kinsey, Geoffrey S.; Krut, D.D.; Cotal, H.; Karam, N.H.

doi:10.1109/wcpec.2006.279567

Cited by 19 publications

(22 citation statements)

References 2 publications

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“…Spectrolab, a leading manufacturer of high performance III-V cells, presented a lattice-matched In 0.495 Ga 0.505 P/In 0.01 Ga 0. 99 As/Ge 3J cell with a 39.0% efficiency at 236 suns under AM1.5D in 2005 [26,27] followed by a metamorphic (i.e., slightly lattice-mismatched) In 0.56 Ga 0.44 P/In 0.08 Ga 0.92 As/Ge with 40.7% at 240 suns in 2007 [28,29]. Higher indium content in top InGaP and middle InGaAs subcells pulls their bandgap energies down and increases photocurrent in those subcells to obtain a better current-matching to the bottom Ge subcell.…”

Section: Developments Of Multijunction Iii-v Solar Cellsmentioning

confidence: 99%

“…However addition of Al induces a significant reduction of the photocurrent of the InGaP cell probably due to the adverse effect of Al and the associated oxygen contamination on minority-carrier properties [47]. Lowering the bandgap of the current-limiting GaAs middle subcell by substituting a portion of the Ga content with In is another approach for higher efficiency than the InGaP/GaAs/Ge 3J cell, although this approach accompanies lattice mismatch and requires graded buffer layers or suffers from large density of dislocations otherwise [27,48]. Thinning of the InGaP subcell to pass a fraction of photons to the GaAs subcell is an alternative, moderate solution [13].…”

Section: 0 Ev Bandgap Subcellsmentioning

confidence: 99%

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A Review of Ultrahigh Efficiency III-V Semiconductor Compound Solar Cells: Multijunction Tandem, Lower Dimensional, Photonic Up/Down Conversion and Plasmonic Nanometallic Structures

Tanabe

2009

Energies

156

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Solar cells are a promising renewable, carbon-free electric energy resource to address the fossil fuel shortage and global warming. Energy conversion efficiencies around 40% have been recently achieved in laboratories using III-V semiconductor compounds as photovoltaic materials. This article reviews the efforts and accomplishments made for higher efficiency III-V semiconductor compound solar cells, specifically with multijunction tandem, lower-dimensional, photonic up/down conversion, and plasmonic metallic structures. Technological strategies for further performance improvement from the most efficient (Al)InGaP/(In)GaAs/Ge triple-junction cells including the search for 1.0 eV bandgap semiconductors are discussed. Lower-dimensional systems such as quantum well and dot structures are being intensively studied to realize multiple exciton generation and multiple photon absorption to break the conventional efficiency limit. Implementation of plasmonic metallic nanostructures manipulating photonic energy flow directions to enhance sunlight absorption in thin photovoltaic semiconductor materials is also emerging.

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Section: Developments Of Multijunction Iii-v Solar Cellsmentioning

confidence: 99%

Section: 0 Ev Bandgap Subcellsmentioning

confidence: 99%

A Review of Ultrahigh Efficiency III-V Semiconductor Compound Solar Cells: Multijunction Tandem, Lower Dimensional, Photonic Up/Down Conversion and Plasmonic Nanometallic Structures

Tanabe

2009

Energies

156

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“…These devices represent a substantial increase in efficiency over existing tandem approaches 18,19 particularly given that the results are measured at 20Â rather than at high concentration typical of tandem devices.…”

Section: Sum Of the Solar Cell Efficienciesmentioning

confidence: 99%

Very high efficiency solar cell modules

Barnett

Kirkpatrick

Honsberg

et al. 2008

Progress in Photovoltaics

185

102

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The Very High Efficiency Solar Cell (VHESC) program is developing integrated optical system-PV modules for portable applications that operate at greater than 50% efficiency. We are integrating the optical design with the solar cell design, and have entered previously unoccupied design space. Our approach is driven by proven quantitative models for the solar cell design, the optical design, and the integration of these designs. Optical systems efficiency with an optical efficiency of 93% and solar cell device results under ideal dichroic splitting optics summing to 42Á7 W 2Á5% are described.

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“…The incorporation of N atoms in the III-V group compound semiconductors like GaNXSb1-X, indicates a large band gap reduction. This has been correlated with the fact that nitrogen introduces localized levels in the band structures that interact with the conduction band and result into the formation of non-parabolic sub bands [11].…”

Section: Epitaxial Lattice Matching and The Growth Techniques Of Compmentioning

confidence: 99%

Epitaxial Lattice Matching and the Growth Techniques of Compound Semiconductors for their Potential Photovoltaic Applications

Husain

Hasan

2018

J. Mod. Mater.

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A B S T R A C TThis paper presents the recent advances in semiconductor alloys for photovoltaic applications. The two main growth techniques involved in these compounds are metal organic chemical vapor deposition (MOCVD) and molecular beam epitaxy (MBE), that has also been discussed. With these techniques, hetero-structures can be grown with a high efficiency. A combination of more than one semiconductor like GaAs, InGaAs and CuInGaAs increases the range of their electrical and optical properties. A large range of direct band gap, high optical absorption and emission coefficients make these materials optimally suitable for converting the light to electrical energy. Their electronic structures reveal that they are highly suitable for photovoltaic applications also because they exhibit spin orbit resonance and metal/semiconductor transitions. The dissociation energy has also been discussed in reference to the increased stability of these compounds.

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Metamorphic and Lattice-Matched Solar Cells Under Concentration

Cited by 19 publications

References 2 publications

A Review of Ultrahigh Efficiency III-V Semiconductor Compound Solar Cells: Multijunction Tandem, Lower Dimensional, Photonic Up/Down Conversion and Plasmonic Nanometallic Structures

A Review of Ultrahigh Efficiency III-V Semiconductor Compound Solar Cells: Multijunction Tandem, Lower Dimensional, Photonic Up/Down Conversion and Plasmonic Nanometallic Structures

Very high efficiency solar cell modules

Epitaxial Lattice Matching and the Growth Techniques of Compound Semiconductors for their Potential Photovoltaic Applications

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