25
25
Sep 13, 2018
09/18
by
Komp, Richard J
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xix, 196 pages : 23 cm
Topics: Solar cells, Photovoltaic power generation, Photovoltaic power generation, Solar cells,...
14
14
Nov 15, 2013
11/13
by
Kaufman, Allan (Allan H.)
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Includes bibliographical references (p. [90]-91) and index
Topics: Solar energy, Solar cells
This thesis investigates the potential use of wurtzite Indium Gallium Nitride as photovoltaic material. Silvaco Atlas was used to simulate a quad-junction solar cell. Each of the junctions was made up of Indium Gallium Nitride. The band gap of each junction was dependent on the composition percentage of Indium Nitride and Gallium Nitride within Indium Gallium Nitride. The findings of this research show that Indium Gallium Nitride is a promising semiconductor for solar cell use.
Topics: Solar cells, Gallium nitride
250
250
Nov 19, 2015
11/15
by
onderkoffer
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Homemade Solar Cells
Topic: Homemade Solar Cells
In this thesis, a new method for developing realistic simulation models of advanced solar cells is presented. Several electrical and optical properties of exotic materials, used in such designs, are researched and calculated. Additional software has been developed to facilitate and enhance the modeling process. Furthermore, specific models of an InGaP/GaAs and of an InGaP/GaAs/Ge multi-junction solar cells are prepared and are fully simulated. The major stages of the process are explained and...
Topics: Solar cells, Photovoltaic cells
A quantitative, contact-free method for extracting minority carrier diffusion length is used to measure the relatively small variations in diffusion length associated with dislocation bands in mismatched epitaxy in the p-type region of a two dimensional heterostructure of a triple junction (InGaP/GaAs/Ge) solar cell sample. These measurements are taken using the line scan mode of a Scanning Electron Microscope coupled with an optical microscope. This technique allowed the variations in...
Topics: Solar cells, Cathodoluminescence, Dislocations
This thesis describes the development of a working thermal model of the Naval Postgraduate School's first CubeSat called NPS-SCAT and the accomplishment of environmental testing that has been completed to date in preparation for space launch. The primary mission of NPS-SCAT is to act as a Solar Cell Array Tester (SCAT), providing data on solar cell performance of various solar cells in Low Earth Orbit (LEO). As part of the satellite development process, a detailed test plan was developed and...
Topics: Solar cells, Satellites
333
333
Jun 10, 2014
06/14
by
onderkoffer
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Homemade Solar Cells
Topics: Homemade, Solar Cells
146
146
Nov 18, 2014
11/14
by
seyedeh maryam vasei
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this is my paper
Topics: solar cells, electrolyte
41
41
Jun 14, 2013
06/13
by
Maycock, Paul D; Stirewalt, Edward N; Maycock, Paul D. Photovoltaics, sunlight to electricity in one step
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Rev. ed. of: Photovoltaics, sunlight to electricity in one step. c1981
Topics: Photovoltaic power generation, Solar cells
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39
Oct 6, 2015
10/15
by
Sengil, Nevsan.
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ADA177981
Topic: Aeronautics,Solar cells,Solar batteries
ADA177981
Topics: Aeronautics, Solar cells, Solar batteries
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317
Jun 26, 2011
06/11
by
King, RUdolph A.; Berry, Scott A.; Kegerise, Michael A
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This document describes an experimental study conducted to examine the effects of protuberances on hypersonic boundary-layer transition. The experiment was conducted in the Langley 20-Inch Mach 6 Tunnel on a series of 0.9-scale Shuttle Orbiter models. The data were acquired to complement the existing ground-based boundary-layer transition database that was used to develop Version 1.0 of the boundary-layer transition RTF (return-to-flight) tool. The existing ground-based data were all acquired...
Topics: SEMICONDUCTOR DEVICES, SOLAR CELLS, PATENTS
An optical, contact-free method for measuring minority carrier diffusion lengths is developed and demonstrated for a range of semiconductor materials used in high efficiency triple junction solar cells. This method uses a Scanning Electron Microscope (SEM) coupled with an optical microscope. The diffusion lengths, combined with minority carrier lifetime measured via time-resolved photoluminescence, allow for the computation of minority charge carrier mobility. The technique uses images to...
Topics: Physics, Photoluminescence, Solar cells, Anisotropy
The Naval Postgraduate School Spacecraft Architecture and Technology Demonstration Satellite, NPSAT1, launching in the fall of 2006, will include a system to measure the performance of new experimental triplejunction solar cells. The measuring circuit in the Solar Cell Measurement System (SMS) is based on a circuit developed at the Naval Postgraduate School many years ago. It will trace the cells' current-voltage (I-V) curves while in orbit. The SMS consists of a radiation-hardened...
Topics: Solar cells, Measurement, Artificial satellites
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45
Apr 6, 2012
04/12
by
Starr, Gary
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Includes bibliographical references (pages 137-138)
Topics: Photovoltaic power generation, Solar cells, Solar houses, Photovoltaic power generation, Solar...
"NPS-67-85-006."
Topics: Solar cells, Testing, Solar energy, laboratory manuals
Click here to view the University of Florida catalog record
Topics: Solar cells, Silicon, Thin films, Semiconductors
The purpose of this thesis is to consider PhotoVoltaic Power Converter (PVPC) technology, developed by Atira Technologiesʼ, and its prospects for military and space applications. This research will validate the hypothesis that PVPC technology enables a solar power system to produce usable power during low- and no-light conditions which standard solar power systems fail to provide. Solar cell panels are exposed to sunlight at different angles and with variable intensity, therefore the...
Topics: Solar energy, Solar cells, Sunshine, Electrical engineering
"March 1986."
Topics: Solar cells, Irradiation, Photovoltaic power generation
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62
Oct 5, 2015
10/15
by
Mabie, Kevin T.
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"NPS-67-85-006."
Topic: Solar cells,Testing,Solar energy,laboratory manuals
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65
Oct 4, 2015
10/15
by
Gold, Don William
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"March 1986."
Topic: Solar cells,Irradiation,Photovoltaic power generation
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19
Feb 6, 2018
02/18
by
*K. Munindra Reddy1 1 Assistant Professor, Department of EEE, Vaagdevi Institute of Technology & Science, Proddatur, A.P.
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ABSTRACT Design of the products based on nanotechnology for renewable energy generation has increased due to an increased efficiency of lighting and heating, increased electrical storage capacity. Just like geothermal energy Nanotechnologies provide essential improvement potentials for the development of both conventional energy sources and renewable energy sources. Nanotechnologies could contribute to the optimization of the layer design and the morphology of organic semiconductor mixtures in...
Topics: Pervoskites, Quantum dots, Dye-sensitized solar cells
The minority carrier diffusion length is a critical parameter in the development of next generation Heterostructure Bipolar Transistors (HBT) and highly efficient solar cells. A novel technique has been developed utilizing direct imaging of electron/hole recombination via an optical microscope and a high sensitivity charge coupled device coupled to a scanning electron microscope to capture spatial information about the transport behavior (diffusion lengths/drift lengths) in luminescent solid...
Topics: Electron microscopes, Mathematical models, Solar cells, Physics
The goal of this thesis is to explore the utility of in-situ optical imaging of charge transport imaging in multi junction solar cells. An in-situ measurement of a manufactured solar cell's key material parameters is difficult. Many sophisticated models may be used to predict performance of new cell arrangements and suggest next generation improvements. In parallel, an experimental view into a complex, multi layered, alloyed semiconductor device can provide important feedback for material...
Topics: Solar cells, Photovoltaic cells, Semiconductors, Junctions, Materials
114
114
Mar 3, 2014
03/14
by
Dr. José M. Campiña
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Mechanisms of Electron Transport in Oxides modified with perovskite nanocrystals: LUMO injection (left) versus Surface Transport (right).
Topics: Solar Cells, Perovskites, Electron Transport, mechanisms
Click here to view the University of Florida catalog record
Topics: Solar cells, Thin films, Photovoltaic power generation
The Naval Postgraduate School Solar Cell Array Tester (NPS-SCAT) seeks to expand the CubeSat knowledge base and provide learning possibilities at the Naval Postgraduate School. This thesis discusses the design, testing, and integration of the electrical power sub-system for NPS-SCAT. The current design will be powered by a commercial-off-the-shelf power system developed by Clyde Space systems. Solar power generation will be via Spectrolab's improved triple junction solar cells. Satellite Tool...
Topics: Satellites, Equipment, Solar cells, Solar energy
Many improvements have been made in the design and manufacture of high efficiency solar cells. The need to understand the behavior of these new types of solar cells is crucial to the procurement of future space systems, both commercial and military. This thesis studies the results of irradiating three commonly used solar cells with 30 MeV electrons using the Naval Postgraduate School Linear Accelerator. A comparison of the performance characteristics of the three cells is made using commonly...
Topics: Solar cells, Effect of radiation on, Radiation
http://uf.catalog.fcla.edu/uf.jsp?st=UF000883297&ix=nu&I=0&V=D
Topics: Semiconductors, Solar cells, Solid state electronics.
1,162
1.2K
Jul 12, 2010
07/10
by
Malkin, M. S
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Test firings and launches will release air pollutants causing a temporary localized small degradation in air quality near the tests or launch site. Areas adjacent to the site will also be subjected to moderate sound levels of predominantly low frequencies for short durations. During the launch phase, hydrogen chloride will be introduced into the stratosphere causing a small decrease in ozone. Temporary perturbations to the ionosphere will occur during orbital maneuvers and entry will have no...
Topics: CZOCHRALSKI METHOD, PRODUCTION COSTS, SILICON, SOLAR CELLS
The evaluation focused on the following subjects: (1) the relative merits of alternative solar cell materials, based on performance and availability, (2) the best manufacturing methods for various solar cell options and the effects of extremely large production volumes on their ultimate costs and operational characteristics, (3) the areas of uncertainty in achieving large solar cell production volumes, (4) the effects of concentration ratios on solar array mass and system performance, (5) the...
Topics: NASA Technical Reports Server (NTRS), ARTIFICIAL SATELLITES, EVALUATION, POWER SUPPLY CIRCUITS,...
330
330
Jul 5, 2010
07/10
by
Helstrom, C. W
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In quantum detection theory, the optimum detection operators must commute; admitting simultaneous approximate measurement of noncommuting observables cannot yield a lower Bayes cost. In addition, the lower bounds on mean square errors of parameter estimates, predicted by the quantum mechanical Cramer-Rao inequality, cannot be reduced by such means.
Topics: ARRAYS, FABRICATION, SOLAR CELLS, TECHNOLOGY ASSESSMENT, ALUMINUM, MANDRELS, STRUCTURAL DESIGN
Prior thesis work has demonstrated the possibility of extending the flight time of military Small Unmanned Aerial Vehicles (SUAV) by 200% with the implementation of thinfilm photovoltaic (TFPV) cells. In this thesis, we investigate how thin-film photovoltaic cells, made out of Copper Indium Gallium Di-Selenide (CIGS) semiconductor materials and mounted on the wings of the Raven RQ-11B SUAV, provide sufficient electrical power to fully operate the UAV for extended periods of time. This research...
Topics: Drone aircraft, Lithium ions, Photovoltaic cells, Solar cells
The electrical power supplied to satellites will continue to be provided by solar cells for the foreseeable future and new technologies and better methods of production for these cells will continue to be developed. Additionally, the space environment within the Earth’s radiation belts and the effect of the radiation on solar cells within this environment is well documented. The effects of radiation on solar cells outside this environment with the use of an 8-MeV electron beam was...
Topics: thin-film, solar cells, electron irradiation, GaAs, high-energy, space
1,436
1.4K
Jul 6, 2010
07/10
by
Artobolevskiy, I. I
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Design of manipulator mechanisms with manual, bioelectric, and automatic control systems
Topics: GALLIUM ARSENIDES, ION RECOMBINATION, SOLAR CELLS, BERYLLIUM, COMPUTER PROGRAMS, ZINC
2
2.0
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xix, 228 p. : 25 cm
Topics: Photovoltaic power systems, Photovoltaic power generation, Solar cells
A genetic algorithm was used to optimize the power output of multi-junction solar cells. Solar cell operation was modeled using the Silvaco ATLASTM software. The output of the ATLASTM simulation runs served as the input to the genetic algorithm. The genetic algorithm was run as a diffusing computation on a network of eighteen dual processor nodes. Results showed that the genetic algorithm produced better power output optimizations when compared with the results obtained using the hill...
Topics: Electrical engineering, Genetics, Algorithms, Solar cells, Computer programs
Exploring semiconductor lifetime, reliability and performance is a never-ending science for today's modern electronics. One significant problem that affects all of these areas is radiation-induced damage. Making calculations to determine how semiconductor devices will hold up in radiation-harsh environments has to be achieved in order to determine system lifetime once placed in their operational capacity. Today's high-technology investments in such areas as satellite design, medical advances,...
Topics: Radiation, Solar cells, Effect of radiation on, Semiconductors, Defects
The Naval Postgraduate School's next satellite to be launched will be the technology demonstration experiment NPSAT1 in 2006. This satellite will be laden with some of the school's top research projects including on orbit solar cell I-V curve testing. The designers of this satellite were presented with three types of solar cells with which to power their satellite: silicon, gallium arsenide, and triple junction cells. This thesis evaluates those three types of cells on the merits of their...
Topics: Solar cells, Artificial satellites, NPSAT1, Solar simulator, LINAC
Recent developments in carbon nanotube technology have allowed for semi-transparent electrodes to be created which can possibly improve the efficiency of solar cells. A method for simulating the use of semi-transparent carbon nanotube networks as a charge collector for solar cells in Silvaco ATLAS software is presented in this thesis. Semi-transparent carbon nanotube networks allow for a greater area of charge collection on the surface of solar cells as well as a lower resistance path for...
Topics: Carbon Nanotubes, Solar Cells, Photovoltaics, Transparent Contact, Silvaco ATLASTM
Thermophotovoltaic cells are a good candidate for use in high efficiency radioisotope thermoelectric generator (RTG) power devices for deep space missions. This thesis examines the use of Silvaco Virtual Wafer Fabrication Software as a tool for designing and optimizing TPV cells for different possible spectra. It gives results for GaSb and InGaAs cells optimized to the AM0 spectrum which closely match published data as well as hypothetical cells optimized to the spectrum of a 1300K blackbody.
Topics: Radioisotopes in aeronautics, Thermoelectric generators, Photovoltaic effect, Solar cells
463
463
Jul 11, 2010
07/10
by
NON
texts
eye 463
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No Abstract Available
Topics: AERODYNAMICS, ASTRIONICS, SPACECRAFT GUIDANCE, AERONAUTICAL ENGINEERING, SOLAR CELLS, SPACECRAFT...
Large, expensive satellites have had failures or degraded missions due to solar cells that had not been tested in the space environment. To address these issues, a solar cell testing CubeSat prototype has been developed as part of the Space Systems Academic Group CubeSat program. This prototype provides a dedicated and responsive solution to testing solar cells in space and, as the first CubeSat built at NPS, it gives valuable experience that will encourage CubeSat projects at NPS in the...
Topics: Solar cells, Design and construction, Testing, Artificial satellites, Electric equipment
The effects of radiation in GaAs solar cells has been extensively researched and the results of numerous investigation have yielded a considerable amount of information about the degradation in irradiated solar cells. This thesis establishes a novel method in which to use Silvaco's physically-based device simulator, ATLAS, to model the effects of radiation on solar cell output characteristics. A virtual model representing a single junction GaAs solar cell was created in ATLAS. The effects of...
Topics: Solar cells, Effect of radiation on, Radiation, ATLAS (Computer)
596
596
Jun 21, 2010
06/10
by
Hanchey, K. K.; Kubik, J. S.; Mahan, J. C
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Development of device to prevent high voltage arcing in electron beam welding
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Topics: CAPACITANCE, PANELS, SOLAR CELLS, DIFFUSION COEFFICIENT, ELECTRICAL MEASUREMENT, LOADS (FORCES)
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179
Jul 11, 2010
07/10
by
NON
texts
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No Abstract Available
Topics: ELECTROCHEMISTRY, SILICON, SOLAR CELLS, EMISSION SPECTRA, VAPOR PRESSURE
The inefficiency of solar cells due to high operating temperatures presents a growing issue for the spacecraft industry. Currently, the problem is solved by accepting the manufactured designs and compensating for losses with larger solar arrays. Building upon prior thesis work at the Naval Postgraduate School, this thesis utilizes Silvaco's ATLAS software as a tool to simulate the performance of a typical InGaP/GaAs/Ge multi-junction solar cell at various temperatures. Additional optimization...
Topics: Electrical engineering, Industries, Computer programs, Solar cells, Space vehicles
Journal of Research of the National Bureau of Standards
Topics: gamma rays, photovoltaic effect, silicon solar cells, x rays.
134
134
Jul 11, 2010
07/10
by
Weilmuenster, K. J.; Hamilton, H. H., I
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A hybridized method for computing the flow about blunt bodies is presented. In this method the flow field is split into its viscid and inviscid parts. The forebody flow field about a parabolic body is computed. For the viscous solution, the Navier-Stokes equations are solved on orthogonal parabolic coordinates using explicit finite differencing. The inviscid flow is determined by using a Moretti type scheme in which the Euler equations are solved, using explicit finite differences, on a...
Topics: CONCENTRATORS, SOLAR CELLS, SOLAR ENERGY, INCIDENT RADIATION, REFLECTION, SOLAR COLLECTORS
