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7339109 |
Apparatus and Method for Optimizing the Efficiency of Germanium Junctions in Multi-Junction Solar Cells. In a preferred embodiment, an indium gallium phosphide (InGaP) nucleation layer is disposed between the germanium (Ge) substrate and...
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7319190 |
The present invention relates generally to the field of photovoltaics and more specifically to manufacturing thin-film solar cells using a thermal process. Specifically, a method is disclosed to manufacture a CIGS solar cell by an in-sit...
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7309832 |
A multi-junction solar cell device ( 10 ) is provided. The multi-junction solar cell device ( 10 ) comprises either two or three active solar cells connected in series in a monolithic structure. The multi-junction device ( 10 ) comprises...
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7297868 |
A photovoltaic cell exhibiting an overall conversion efficiency of at least 9.0% is prepared from a copper-indium-gallium-diselenide thin film. The thin film is prepared by simultaneously electroplating copper, indium, gallium, and selen...
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7285720 |
A solar cell has an active semiconductor structure and a back electrical contact overlying and contacting an active semiconductor structure back side. A front electrical contact is applied overlying and contacting the active semiconducto...
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7271333 |
The present invention relates to light-weight thin-film photovoltaic cells, methods for making cells, modules made from cells, and methods for making modules from cells. The invention teaches a manner in which individual cells may be bon...
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7253355 |
The invention relates to a method for constructing a layer structure on an especially fragile flat substrate. In order for thin, fragile flat substrates to be able to be subjected to refinement or construction of semiconductor components...
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7217882 |
An alloy having a large band gap range is used in a multijunction solar cell to enhance utilization of the solar energy spectrum. In one embodiment, the alloy is In 1−x Ga x N having an energy bandgap range of approximately 0.7 eV to 3...
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7202411 |
A photovoltaic or thermophotovoltaic device includes a diode formed by p-type material and n-type material joined at a p-n junction and including a depletion region adjacent to said p-n junction, and a quantum barrier disposed near or in...
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7179677 |
A process for making a thin film ZnO/Cu(InGa)Se 2 solar cell without depositing a buffer layer and by Zn doping from a vapor phase, comprising: depositing Cu(InGa)Se 2 layer on a metal back contact deposited on a glass substrate; heati...
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7148417 |
A two-junction solar cell has a bottom solar cell junction of crystalline silicon, and a top solar cell junction of gallium phosphide. A three (or more) junction solar cell has bottom solar cell junctions of silicon, and a top solar cell...
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7148123 |
Systems and methods are described for synthesis of films, coatings or layers using templates. A method includes locating a template within at least one of a first precursor layer that is coupled to a first substrate and a second precurso...
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7126052 |
A method of disordering a layer of an optoelectronic device including; growing a plurality of lower layers; introducing an isoelectronic surfactant; growing a layer; allowing the surfactant to desorb; and growing subsequent layers all pe...
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7122734 |
A method of reducing propagation of threading dislocations into active areas of an optoelectronic device having a III–V material system includes growing a metamorphic buffer region in the presence of an isoelectronic surfactant. A firs...
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7122733 |
The present invention provides a solar cell comprising a substrate, a first buffer layer disposed above the base layer, a second buffer layer disposed above the first buffer layer, a first boron compound layer disposed above the second b...
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7119271 |
A photovoltaic cell or other optoelectronic device having a wide-bandgap semiconductor used in the window layer. This wider bandgap is achieved by using a semiconductor composition that is not lattice-matched to the cell layer directly b...
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7115811 |
The present invention is directed to systems and methods for protecting a solar cell. The solar cell includes first solar cell portion. The first solar cell portion includes at least one junction and at least one solar cell contact on a ...
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7087833 |
Nanocomposite photovoltaic devices are provided that generally include semiconductor nanocrystals as at least a portion of a photoactive layer. Photovoltaic devices and other layered devices that comprise core-shell nanostructures and/or...
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7087832 |
Nanocomposite photovoltaic devices are provided that generally include semiconductor nanocrystals as at least a portion of a photoactive layer. Photovoltaic devices and other layered devices that comprise core-shell nanostructures and/or...
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7081584 |
Method and system for converting solar energy into electrical energy utilizing serially coupled multijunction-type photovoltaic cells in conjunction with a form of spectral cooling. The latter cooling is carried out by removing ineffecti...
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7071407 |
A method and a multijunction solar device having a high band gap heterojunction middle solar cell are disclosed. In one embodiment, a triple-junction solar device includes bottom, middle, and top cells. The bottom cell has a germanium (G...
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7053293 |
GaAs substrates with compositionally graded buffer layers for matching lattice constants with high-Indium semiconductor materials such as quantum well infrared photoconductor devices and thermo photo voltaic devices are disclosed.
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7019208 |
Sulfur is used to improve the performance of CIGS devices prepared by the evaporation of a single source ZIS type compound to form a buffer layer on the CIGS. The sulfur may be evaporated, or contained in the ZIS type material, or both. ...
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6878871 |
Nanocomposite photovoltaic devices are provided that generally include semiconductor nanocrystals as at least a portion of a photoactive layer. Photovoltaic devices and other layered devices that comprise core-shell nanostructures and/or...
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6864414 |
A solar cell having a multijunction solar cell structure with a bypass diode is disclosed. The bypass diode provides a reverse bias protection for the multijunction solar cell structure. In one embodiment, the multifunction solar cell st...
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6822158 |
A thin-film solar cell including a transparent electrode layer, a semiconductor photovoltaic conversion layer, a rear transparent electrode layer and a rear reflective metal layer, said layers being formed in this order on a transparent ...
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6818818 |
There is disclosed herein a concentrating solar energy receiver comprising a primary parabolic reflector having a center and a high reflectivity surface on a concave side of the reflector and having a focal axis extending from the concav...
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6815736 |
Isoelectronic co-doping of semiconductor compounds and alloys with deep acceptors and deep donors is used to decrease bandgap, to increase concentration of the dopant constituents in the resulting alloys, and to increase carrier mobiliti...
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6787385 |
A method of combining group III elements with group V elements that incorporates at least nitrogen from a nitrogen halide for use in semiconductors and in particular semiconductors in photovoltaic cells.
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6768048 |
Methods for formulating and depositing a sol-gel coating onto a surface of a solar cell to provide improved radiation damage resistance. The sol-gel contains a solvent, alkoxyzirconium and an organosilane, with an organic acid catalyst a...
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6706959 |
A photoelectric conversion element is disposed in each of a plurality of recesses of a support. Light reflected by the inside surface of the recess shines on the photoelectric conversion element. The photoelectric conversion element has ...
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6689949 |
A concentrating photovoltaic module is provided which provides a concentration in the range of about 500 to over 1,000 suns and a power range of a few kW to 50 kW. A plurality of such modules may be combined to form a power plant capable...
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6680432 |
Apparatus and Method for Optimizing the Efficiency of a Bypass Diode in Solar Cells. In a preferred embodiment, a layer of TiAu is placed in an etch in a solar cell with a contact at a doped layer of GaAs. Electric current is conducted t...
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6660928 |
A solar cell comprising a substrate, a buffer layer, a first subcell, a second subcell, and a third subcell, where said first subcell, said second subcell, and said third subcell are lattice matched, and where said substrate is lattice m...
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6600100 |
The present invention is directed to systems and methods for protecting a solar cell. The solar cell includes first solar cell portion. The first solar cell portion includes at least one junction and at least one solar cell contact on a ...
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6590150 |
A combination photovoltaic cell and RF antenna in a single unit performs the dual functions of transmitting and receiving RF signals to and from a transceiver and converting light waves to electric power to operate the transceiver. The p...
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6586669 |
A perfectly or approximately lattice-matched semiconductor layer for use in an electronic or optoelectronic device. Perfectly lattice-matched (“PLM”) semiconductor layers prevent or lessen the formation and propagation of crystal def...
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6566595 |
A solar cell having a p-type semiconductor layer and an n-type semiconductor layer made of a first compound semiconductor material, and a semiconductor layer sandwiched between the p-type semiconductor layer and the n-type semiconductor ...
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6559372 |
Systems and methods are described for compositions, apparatus and/or electronic devices. A composition, includes a composition layer defining a first surface and a second surface, the composition layer including a collection layer that i...
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6552259 |
In this bypass-function added solar cell, a plurality of island-like p + regions, which is third regions, are formed at a boundary between a p-type region and an n-type region layer constituting a substrate so that the p + regions proj...
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6534704 |
A solar cell includes a first semiconductor layer that is p-type, and a second semiconductor layer that is n-type formed over the first semiconductor layer. The solar cell includes a layer A made of a semiconductor different from the fir...
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6515217 |
A solar collector ( 100 ) is provide having increased efficiency and operating life, and reduced size and cost over conventional collectors. Generally, the collector ( 100 ) includes a three-dimensional array ( 110 ) of cells ( 104 ), in...
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6504091 |
A photoelectric converting device is provided with enhanced photoelectric conversion efficiency by optimizing a combination of materials used for top and bottom cells. The photoelectric converting device of the present invention is provi...
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6486391 |
The invention relates to a diode structure, especially for thin film solar cells. The aim of the invention is to provide a diode structure for thin film solar cells. Said structure allows for an assembly of a thin film solar cell, whereb...
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6444897 |
The invention relates to a solar cell containing a semiconductor ( 1 ) with an intermediate band ( 2 ) that is half filled with electrons, located between two layers of ordinary n type ( 3 ) and p type ( 4 ) semiconductors. When lighted,...
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6441301 |
A solar cell with good characteristics and high reliability is provided that includes a semiconductor comprising at least one element from each of groups Ib, IIIb, and VIb. A method of manufacturing the same also is provided. The solar c...
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6437233 |
A solar cell comprises a superstrate formed from a material that is transparent to light, a first layer formed of delta doped silicon, a plurality of layers formed from semiconductor materials, each characterized by multi-quantum wells a...
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6429369 |
The invention relates to a thin-film solar cell on the basis of IB-IIIA-VIA compound semiconductors and a method for producing such a solar cell. Between the polycrystalline IB-IIIA-VIA absorber layer of the p-type conductivity and the c...
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6384321 |
The present invention provides an electrolyte composition, comprising an electrolyte containing at least one kind of an imidazolium salt selected from the group consisting of 1-methyl-3-propyl imidazolium iodide, 1-methyl-3-isopropyl imi...
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6372981 |
A group-IV semiconductor substrate has an inclined front surface, the inclination being toward a direction differing from the <010>crystal lattice direction. The substrate is cleansed by heating in the presence of a gas including a...
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