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103 results about "Intermediate band" patented technology
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Intermediate band photovoltaics in solar cell research provides methods for exceeding the Shockley–Queisser limit on the efficiency of a cell. It introduces an intermediate band (IB) energy level in between the valence and conduction bands. Theoretically, introducing an IB allows two photons with energy less than the bandgap to excite an electron from the valence band to the conduction band.
Intermediate band semiconductor photovoltaic solar cell
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, electron-hole pairs are formed either by a photon that absorbs the necessary energy (5) or by two photons (6,7) that absorb less energy which pump an electron from the valence band to the intermediate band (8) and from the latter to the conductance band (9). An electrical current is generated that exits on the p side and returns via the n side. The n and p layers also prevent the intermediate band from contacting the outer metal connections, which would have resulted in a short-circuit. Said cell converts solar energy into electricity in a more efficient manner than conventional cells and contributes to improvement of the photovoltaic devices.
Owner:AUTONOMOUS UNIVERSITY OF MADRID +2
Intermediate-band photosensitive device with quantum dots having tunneling barrier embedded in organic matrix
A plurality of quantum dots each have a shell. The quantum dots are embedded in an organic matrix. At least the quantum dots and the organic matrix are photoconductive semiconductors. The shell of each quantum dot is arranged as a tunneling barrier to require a charge carrier (an electron or a hole) at a base of the tunneling barrier in the organic matrix to perform quantum mechanical tunneling to reach the respective quantum dot. A first quantum state in each quantum dot is between a lowest unoccupied molecular orbital (LUMO) and a highest occupied molecular orbital (HOMO) of the organic matrix. Wave functions of the first quantum state of the plurality of quantum dots may overlap to form an intermediate band.
Owner:THE TRUSTEES FOR PRINCETON UNIV
Intermediate-band photosensitive device with quantum dots embedded in energy fence barrier
A plurality of layers of a first semiconductor material and a plurality of dots-in-a-fence barriers disposed in a stack between a first electrode and a second electrode. Each dots-in-a-fence barrier consists essentially of a plurality of quantum dots of a second semiconductor material embedded between and in direct contact with two layers of a third semiconductor material. Wave functions of the quantum dots overlap as at least one intermediate band. The layers of the third semiconductor material are arranged as tunneling barriers to require a first electron and / or a first hole in a layer of the first material to perform quantum mechanical tunneling to reach the second material within a respective quantum dot, and to require a second electron and / or a second hole in a layer of the first semiconductor material to perform quantum mechanical tunneling to reach another layer of the first semiconductor material.
Owner:THE TRUSTEES FOR PRINCETON UNIV
Intermediate-band photosensitive device with quantum dots having tunneling barrier embedded in inorganic matrix
A plurality of quantum dots comprise a first inorganic material, and each quantum dot is coated with a second inorganic material. The coated quantum dots being are in a matrix of a third inorganic material. At least the first and third materials are photoconductive semiconductors. The second material is arranged as a tunneling barrier to require a charge carrier (an electron or a hole) at a base of the tunneling barrier in the third material to perform quantum mechanical tunneling to reach the first material within a respective quantum dot. A first quantum state in each quantum dot is between a conduction band edge and a valence band edge of the third material in which the coated quantum dots are embedded. Wave functions of the first quantum state of the plurality of quantum dots may overlap to form an intermediate band.
Owner:THE TRUSTEES FOR PRINCETON UNIV
Radio communication apparatus and method
InactiveUS20110019634A1Improve efficiencyPreventing excessive increase of overheadAssess restrictionTime-division multiplexMultiplexingIntermediate frequency
A disclosed radio communication apparatus includes an intermediate band detecting unit detecting an intermediate band which is a band between a first frequency band and a second frequency band which are allocated to a same mobile communication system or different mobile communication systems, a use status detecting unit detecting an uplink / downlink multiplexing method used in each of the first frequency band and the second frequency band, and a determination unit determining, based on the intermediate band and the uplink / downlink multiplexing method, the uplink / downlink multiplexing method usable in the intermediate band and a guard band in which use of frequencies are prevented, the guard band being included in the intermediate band.
Owner:NTT DOCOMO INC
Wideband signal analyzing apparatus, wideband period jitter analyzing apparatus, and wideband skew analyzing apparatus
InactiveUS20050273320A1Increase delay timeSpectral/fourier analysisDigital circuit testingFrequency spectrumIntermediate frequency
A wideband signal analyzing apparatus for analyzing an input signal includes frequency-shifting means for generating a plurality of intermediate frequency signals by shifting a frequency of the input signal as much as respectively different frequency-shifting amounts, so that if a frequency band of the input signal is divided into a plurality of frequency bands, each of the frequency bands can be shifted to a predetermined intermediate band, spectrum measuring means for outputting a complex spectrum of each of the intermediate frequency signals, and spectrum reconstructing means for merging the complex spectra.
Owner:ADVANTEST CORP
Intermediate-band photosensitive device with quantum dots embedded in energy fence barrier
Owner:THE TRUSTEES FOR PRINCETON UNIV
Quantum dot intermediate band infrared photodetector
An infrared photodetector containing a region of semiconductor quantum dots (1), n type doped in the barrier region (2), and sandwiched between respective layers of semiconductors of n type (3) and p type (4). When infrared photons (5) are absorbed, they create electronic transitions (6) from the confined states in the dots (7) to the conduction band (8). This causes the appearance of a voltage between device p (9) and n (10) contacts or the production of an electrical current. In either way, the detection of the infrared light is possible. A low band-pass filter (12) prevents high energy photons (13) from entering the device and causing electronic transitions (14) from the valence (15) band to the conduction band (8).
Owner:UNIV MADRID POLITECNICA +1
Multistage inverse quantization having the plurality of frequency bands
InactiveUS20050060147A1Efficiently quantizedLess quantization errorSpeech analysisPayment architectureIntermediate frequencyIntermediate band
With respect to audio signal coding and decoding apparatuses, there is provided a coding apparatus that enables a decoding apparatus to reproduce an audio signal even through it does not use all of data from the coding apparatus, and a decoding apparatus corresponding to the coding apparatus. A quantization unit constituting a coding apparatus includes a first sub-quantization unit comprising sub-quantization units for low-band, intermediate-band, and high-band; a second sub-quantization unit for quantizing quantization errors from the first sub-quantization unit; and a third sub-quantization unit for quantizing quantization errors which have been processed by the first sub-quantization unit and the second sub-quantization unit.
Owner:PANASONIC CORP
Multistage inverse quantization having the plurality of frequency bands
InactiveUS6904404B1Improve efficiencyAvoid excessive errorSpeech analysisPayment architectureIntermediate frequencyIntermediate band
With respect to audio signal coding and decoding apparatuses, there is provided a coding apparatus that enables a decoding apparatus to reproduce an audio signal even through it does not use all of data from the coding apparatus, and a decoding apparatus corresponding to the coding apparatus. A quantization unit constituting a coding apparatus includes a first sub-quantization unit comprising sub-quantization units for low-band, intermediate-band, and high-band; a second sub-quantization unit for quantizing quantization errors from the first sub-quantization unit; and a third sub-quantization unit for quantizing quantization errors which have been processed by the first sub-quantization unit and the second sub-quantization unit.
Owner:PANASONIC CORP
Method for transforming bandpass filters to facilitate their production and resulting devices
InactiveUS20040036554A1Practice is disadvantageousComplex calculationMultiple-port networksPiezoelectric/electrostrictive/magnetostrictive devicesBandpass filteringTransformer
The invention concerns a method for optimizing elements of a narrow or intermediate band bandpass filter whereof the LC prototype has been determined. The invention is characterised in that it comprises steps which consist in: (i) breaking down several parallel or series capacitors of resonators with X elements, (ii) inserting pairs of transformers between the first and second separated element and the rest of the resonator, (iii) displacing the residual transformers to modify the impedance levels of the resonators, and (iv) absorbing the residual transformers by transformation. The invention also concerns the resulting filters.
Owner:FRANCE TELECOM SA
Intermediate band solar cell having solution-processed colloidal quantum dots and metal nanoparticles
InactiveUS20130092221A1Enhanced light absorptionFinal product manufactureSolid-state devicesHost materialIntermediate band
Owner:UNIV MADRID POLITECNICA
Solar cell and solar cell manufacturing method
InactiveUS20110290310A1Restricts carrier lossImprove energy conversion efficiencyMaterial nanotechnologySemiconductor/solid-state device manufacturingHigh energyIntermediate band
A solar cell capable of restricting carrier loss and yields higher energy conversion efficiency than was conventionally possible and a method of producing a solar cell enabling formation of a light absorbing layer containing quantum dots through a low-temperature process using a coating or printing method requiring no vacuum equipment or complicated apparatuses. The solar cell includes a light absorbing layer containing quantum dots in a matrix layer, and the light absorbing layer is connected to an N-type semiconductor layer on one side and to a P-type semiconductor layer on the other side. In the light absorbing layer, the quantum dots are made of nanocrystalline semiconductor and arranged 3-dimensionally uniformly enough and spaced regularly so that a plurality of wave functions lie on one another between adjacent quantum dots to form intermediate bands. The matrix layer is formed of amorphous IGZO.
Owner:FUJIFILM CORP
Triple band combining approach to satellite signal distribution
ActiveUS20070082603A1Satellite broadcast receivingGHz frequency transmissionIntermediate frequencyCombined method
A method, apparatus and system for combining signals in a satellite delivery system is disclosed. A system in accordance with the present invention comprises a first set of satellite signals broadcast in a first frequency band, wherein the first set of satellite signals is downconverted to a first intermediate frequency band of signals, a second set of satellite signals broadcast in a second frequency band, wherein the second set of satellite signals is downconverted to a second intermediate frequency band of signals and a third intermediate frequency band of signals, a combiner for receiving the receiving the first intermediate frequency band of signals, the second intermediate frequency band of signals, and the third intermediate frequency band of signals, and combining the first intermediate frequency band of signals, the second intermediate frequency band of signals, and the third intermediate frequency band of signals into a delivery signal, a distribution unit, coupled to the combiner, for distributing the delivery signal to a plurality of outputs, and at least one receiver, coupled to an output of the plurality of outputs, wherein the at least one receiver processes at least the first intermediate band of signals in the delivery signal.
Owner:DIRECTV LLC
Synthetic aperture radar system using chaos signal
ActiveCN101089655AIncreased Mapping BandwidthWith anti-interference abilityRadio wave reradiation/reflectionQuadrature modulatorRadar systems
A synthetic aperture radar system using chaos signal comprises base band chaos signal generator, orthogonal modulator, the first and the second intermediate band-pass filter and amplifier, the first and the second mixer, power amplifier, low noise amplifier, coherent rectifier, A / D converter, data recorder, imaging processor, timer, frequency source, duplexer and antenna for easily clearing off noise signal and raising width of mapping belt.
Owner:INST OF ELECTRONICS CHINESE ACAD OF SCI
Wideband signal analyzing apparatus, wideband period jitter analyzing apparatus, and wideband skew analyzing apparatus
InactiveUS7317309B2Spectral/fourier analysisDigital circuit testingFrequency spectrumIntermediate frequency
A wideband signal analyzing apparatus for analyzing an input signal includes frequency-shifting means for generating a plurality of intermediate frequency signals by shifting a frequency of the input signal as much as respectively different frequency-shifting amounts, so that if a frequency band of the input signal is divided into a plurality of frequency bands, each of the frequency bands can be shifted to a predetermined intermediate band, spectrum measuring means for outputting a complex spectrum of each of the intermediate frequency signals, and spectrum reconstructing means for merging the complex spectra.
Owner:ADVANTEST CORP
Method for transforming bandpass filters to facilitate their production and resulting devices
InactiveUS6870441B2Reduce the numberMany of characteristicMultiple-port networksPiezoelectric/electrostrictive/magnetostrictive devicesBandpass filteringTransformer
Owner:FRANCE TELECOM SA
Low-pass filter multi-scale full waveform inversion method of cut-off time window
InactiveCN106054244AIncrease the lengthImprove stabilitySeismic signal processingTime domainModel testing
The invention relates to a low-pass filter multi-scale full waveform inversion method of a cut-off time window. The method comprises the steps of firstly, in a low band, performing full waveform inversion using a cut-off time window inversion strategy to obtain an inversion result serving as an initial model for intermediate band inversion; and then performing full waveform inversion of a conventional time domain using the intermediate band inversion result as an initial model to obtain a final inversion result. The cut-off time window inversion strategy saves a lot forward time. The low-pass filter multi-scale inversion strategy can divide seismic data to different bands for inversion. A good inversion result can be obtained by using the cut-off time window and the low-pass filter together under the condition of low frequency deficiency and strong Gaussian noise interference. Model test results show that the combined strategy relieves a cycle-slip phenomenon while improving the calculation efficiency, and the low-pass filter multi-scale full waveform inversion method of the cut-off time window is superior to the full waveform inversion of the conventional time domain on the aspects of inversion precision, calculation efficiency, low-frequency dependency, anti-noise capability and the like.
Owner:JILIN UNIV
Solar cell
InactiveUS20150053261A1Improvement in carrier extraction efficiencyHigh light confinement effectNanoopticsPhotovoltaic energy generationNanopillarIntermediate band
A surface reflectivity of a solar cell is reduced by applying a nanopillar array including a plurality of nanopillars to the solar cell. Further, by constituting the nanopillars with a Si / SiGe superlattice and controlling a Ge composition ratio of a SiGe layer (2), excited electron and hole are spatially separated in different layers, thus increasing a carrier lifetime, and at the same time, an optical-electrical conversion efficiency is improved by a multi-exciton phenomenon due to a quantum confinement effect. In addition, by forming an intermediate band by thinning a Si layer (1) and the SiGe layer (2), a carrier extraction efficiency is improved.
Owner:HITACHI LTD
Wireless receiver
ActiveUS20130034190A1Precise positioningShort time-to-first-fixModulated-carrier systemsPosition fixationEngineeringAnalog front-end
Wireless receiver for receiving a plurality of co-existing wireless signals respectively from different positioning systems, includes an analog frontend and an analog-to-digital converting unit. The analog frontend is arranged to convert bands of the co-existing wireless signals into a plurality of corresponding intermediate bands by a local frequency and to provide an intermediate signal including the intermediate bands. The analog-to-digital converting unit is coupled to the analog frontend, and is arranged to convert the intermediate signal to a digital signal, wherein an operation band of the analog-to-digital converting unit covers the plurality of intermediate bands.
Owner:MEDIATEK SINGAPORE PTE LTD SINGAPORE
Preparation method of intermediate band material based on ultrafast laser doping
InactiveCN102437031ADoping achievedSolve the difficult problem of high-concentration non-equilibrium dopingFinal product manufactureSemiconductor/solid-state device manufacturingHigh concentrationMott transition
The invention discloses a preparation method of an intermediate band material based on ultrafast laser doping, which comprises the following steps: coating a titanium film on the surface layer of a silicon substrate by vaporization; and carrying out vaporization coating on the surface layer of the silicon material with the titanium film by ultrafast laser irradiation. By adopting a method of coating a titanium film on the silicon substrate by ultrafast laser irradiation, the doping concentration of titanium in the silicon material exceeds that of Mott transition titanium elements, and further the silicon-base intermediate band material is prepared, thereby solving the problem of high-concentration non-equilibrium titanium doping difficulty in the silicon material.
Owner:INST OF SEMICONDUCTORS - CHINESE ACAD OF SCI
Production process of gradient band gap CIGS solar cell light absorption layer by adopting anti-vacuum method
ActiveCN103887373APrecisely Control ComponentsHigh purityFinal product manufacturePhotovoltaic energy generationRare-earth elementIndium
The invention provides a production process of a gradient band gap CIGS solar cell light absorption layer by adopting an anti-vacuum method. Gallium and organic selenium source solutes are used as a crystal nucleus growing agent and dissolve in an III.VI-group ternary compound to obtain a pure phase. C, Si, Ge and Sn main groups, V, Cr, Fe positive ions, Ti transition metal and lanthanide series light rare earth element dopants or aluminum, sulfur and carbon participate in liquid-solid-phase coordination chemical reaction to form an indium-free gallium-free intermediate band material and the solar cell photon absorption layer with five different elemental constituents distributed in a gradient energy band mode. The production process comprises the steps of S1, preparing a precursor solution F1 with a conduction band base layer and a valence band top layer; S2, preparing a precursor solution F2 with an intermediate band layer; S3, preparing a precursor solution F3 for band gap adjustment, a precursor solution F4 with a band gap adjustment sub-layer and a precursor solution F5 for adjustment sub-layer supplementation; S4, cleaning a substrate; S5, performing coating to form the light absorption layer; S6 performing organic selenium source thermo-synthesis.
Owner:超晶维(苏州)光电科技有限公司
Audio device and sound beam control method
ActiveUS8189828B2Large volumeReduce leaked soundTransducer detailsPublic address systemsIntermediate frequencySide lobe
In an audio device equipped with a speaker array device aligning a plurality of speaker units, a sound beam is emitted towards a specific person in a main beam direction, thus realizing the listening of the audio contents with good sound quality. Other persons listen to the audio contents at off-beam positions; hence, leaked sound due to side lobes of the sound beam is transmitted to them with respect to an intermediate band and a low band, thus realizing the listening of the sound with an adequate volume. A high band is subjected to sharp beam control, wherein with respect to an intermediate volume or higher volume, high-frequency components are convoluted with the sound beam and are emitted with non-directivity.
Owner:YAMAHA CORP
Plasmon enhancement type solar cell with intermediate bands and photoelectric conversion film material of solar cell
InactiveCN102496639AMaterial nanotechnologyFinal product manufacturePhotoelectric conversionMetal electrodes
The invention provides a plasmon enhancement type solar cell with intermediate bands. The solar cell comprises a substrate, a back electrode arranged on the substrate, a complementary type film arranged on the back electrode, a photoelectric conversion film material arranged on the complementary type film, an insulating layer and a metal electrode, wherein the photoelectric conversion film material comprises a photoelectric conversion layer with intermediate bands and a nanometal structure layer arranged on the photoelectric conversion layer for assisting in absorbing light. According to the invention, the obtained solar cell and the photoelectric conversion film material forming the solar cell have the advantages of high conversion efficiency, stable cell property and reasonable manufacturing cost.
Owner:UNIV OF SCI & TECH OF CHINA
A MgIn2S4-based intermediate band solar energy absorbing material and a preparation method thereof
InactiveCN109037373AAdded light absorption pathEnhanced light absorptionSemiconductor devicesAbsorption capacityIntermediate band
The invention discloses a MgIn2S4-based intermediate band solar energy absorbing material and a preparation method thereof, wherein the chemical formula is MgIn2-xSnxS4, 0 < x < 2, obtained by vacuumsolid-state reaction sintering process through the formation of a half-full intermediate band in the in-site doping element Sn of the parent compound MgIn2S4; Compared with the traditional solar cellmaterials, the above materials increase the electron absorption path and enhance the light absorption capacity.
Owner:SHANGHAI DIANJI UNIV
Radio communication apparatus and method
InactiveUS8295226B2Improve efficiencyPreventing excessive increase of overheadFrequency-division multiplex detailsAssess restrictionMultiplexingIntermediate frequency
A disclosed radio communication apparatus includes an intermediate band detecting unit detecting an intermediate band which is a band between a first frequency band and a second frequency band which are allocated to a same mobile communication system or different mobile communication systems, a use status detecting unit detecting an uplink / downlink multiplexing method used in each of the first frequency band and the second frequency band, and a determination unit determining, based on the intermediate band and the uplink / downlink multiplexing method, the uplink / downlink multiplexing method usable in the intermediate band and a guard band in which use of frequencies are prevented, the guard band being included in the intermediate band.
Owner:NTT DOCOMO INC
Single local oscillator sharing in multi-band ka-band LNBS
ActiveUS20070082644A1Satellite broadcast receivingGHz frequency transmissionMulti bandIntermediate frequency
Owner:DIRECTV LLC
Non-pneumatic tire with multi-connection connecting elements
InactiveUS20170368869A1Non-inflatable tyresHigh resiliency wheelsIntermediate bandElectrical and Electronics engineering
A non-pneumatic tire (101) having a hub (201) and a compliant outer band (109) connected by connecting members (129) that are intersected by an intermediate band (120) positioned between the hub (201) and compliant outer band (109) forming a plurality of connecting element segments (331,333), each segment having a predominant curvature extending in the same longitudinal direction said direction coinciding with the preferred direction of rotation of the tire (101).
Owner:MICHELIN & CO CIE GEN DES ESTAB MICHELIN
Microwave frequency satellite signal reception installation
InactiveUS20100088729A1Satellite broadcast receivingGHz frequency transmissionIntermediate frequencyIntermediate band
The present invention relates to an installation for receiving microwave frequency radio satellite signals, said installation comprising a first electric adder to add a first electrical signal representative of a radio signal according to a first polarization and transposed to a first intermediate band and a second electrical signal representative of a radio signal according to a first polarization and transposed to a second intermediate band and a second electric adder to add a first electrical signal representative of a radio signal according to a second polarization and transposed to the first intermediate band and a second electrical signal representative of a radio signal according to a second polarization and transposed to a second intermediate band.
Owner:EUTELSAT
Expandable trolley
The present invention relates to an expandable trolley comprising an interfaced pair of preferably rigid semi-bodies, between which a perimeter band of soft material is mounted and closed by a corresponding perimeter zipper; it being provided that said trolley is provided on the outside of said soft intermediate band with a basically perimeter second zipper, the toothed sides of which are mounted on the interfaced borders of said semi-bodies.
Owner:DIELLE MFR
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