| Integrated, Flexible, High-efficiency Solar Cells: Epitaxial Lift-Off GaAs Solar Cells and Enabling Substrate Reuse |
Aug 2012 |
24 pages |
| Authors:
Jeramy D Zimmerman; Kyusang Lee; Stephen R Forrest; MICHIGAN UNIV ANN ARBOR
|
|
| Power Considerations for Micro-Autonomous Systems |
30 Jul 2012 |
32 pages |
| Authors:
Brian C Morgan; ARMY RESEARCH LAB ADELPHI MD SENSORS AND ELECTRON DEVICES DIRECTORATE
|
|
| World Materials Summit (3rd). Held in Washington, DC on 9-12 October, 2011 |
23 May 2012 |
160 pages |
| Authors:
Tim Palucka; Betsy Fleischer; MATERIALS RESEARCH SOCIETY WARRENDALE PA
|
 | The 2011 World Materials Summit brought together global scientific experts and policymakers to continue the dialogue in the U.S. Capitol on the role of materials science in energy and the environment. It focused on the critical links among materials research, energy, and sustainable development on a global scale. Abundant clean energy supplies and reliable energy storage systems are needed to address many critical societal issues in development and developed countries. ... |
|
| Thermophotovoltaic Energy Conversion for Personal Power Sources |
Feb 2012 |
38 pages |
| Authors:
C M Waits; ARMY RESEARCH LAB ADELPHI MD SENSORS AND ELECTRON DEVICES DIRECTORATE
|
| Advancements in photovoltaic, thermal emission, and compact liquid fueled combustion sources enable thermophotovoltaic energy conversion to compete with battery and fuel technology for compact power applications. This report highlights all components of the thermal-to-electric energy conversion (TEC) system including the balance-of-plant and provides a review of the state of the art. Evaluation of each component s performance determined that a 10% efficient thermophotovoltaic power source could be realizable by integrating ... |
|
| Solar Energy Development on Department of Defense Installations in the Mojave and Colorado Deserts |
Jan 2012 |
533 pages |
| Authors:
Robert Kwartin; Sarah Alexander; Martin Anderson; Donald Clark; John Collins; Chris Lamson; Garrett Martin; Ryan Mayfield; Lindsay McAlpine; Daniel Moreno; ICF INTERNATIONAL INC FAIRFAX VA
|
| The study addresses the following issues: (1) Evaluate the technical and economic feasibility of locating solar energy generation within the identified military installations and identify potential areas for solar energy development; (2) Evaluate limitations on the use of solar energy because of military mission, environmental, and jurisdictional constraints; and, (3) Analyze the feasibility and potential for on-installation solar energy generation to provide additional security benefits for the military installations. |
|
| Hawaii Energy and Environmental Technologies (HEET) Initiative |
Dec 2011 |
214 pages |
| Authors:
Richard E Rocheleau; Keith Bethune; Maheboob Virji; Michael J Antal Jr; Michael J Cooney; Bor Y Liaw; Scott Q Turn; William Piavis; M Nurunnabi; Jian Yu; HAWAII NATURAL ENERGY INST HONOLULU
|
| This report covers efforts by the Hawaii Natural Energy Institute (HNEI) of the University of Hawaii under the ONR-funded HEET Initiative that addresses critical technology needs for exploration/utilization of seabed methane hydrates, development/testing of advanced fuel cells and fuel cell systems, an expanded effort on fuel processing and purification, and a new task addressing testing and evaluation of alternate energy sources, with initial activities in testing of heat exchangers for ... |
|
| Alternative Energy for Defense Conference |
26 Oct 2011 |
36 pages |
| Authors:
Jonathan M Cristiani; ARMY COMMUNICATIONS-ELECTRONICS RESEARCH AND DEVELOPMENT ENG CTR APG MD POWER GENERATION AND ALTERNATIVE ENERGY BRANCH
|
| An overview of the CERDEC Alternative / Renewable Energy program is provided. |
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| Scalable Energy Networks to Promote Energy Security |
JUL 2011 |
7 pages |
| Authors:
Paul E. Roege; NATIONAL DEFENSE UNIV WASHINGTON DC
|
| In an age of fluctuating energy prices and environmental concerns, engineers and scientists are locked into a worldwide race to improve energy technologies. Through hard work and investment, these innovators are creating more efficient photovoltaic cells, responsive energy management software, and wireless energy transmission devices. Some of the greatest potential gains, however, remain to be harvested through energy system integration and networking, which ultimately will transform all forms of energy ... |
|
| Thermophotovoltaic Energy Conversion in Submarine Nuclear Power Plants |
JUN 2011 |
105 pages |
| Authors:
JOHN N. HOWARD; NAVAL POSTGRADUATE SCHOOL MONTEREY CA DEPT OF ELECTRICAL AND COMPUTER ENGINEERING
|
| Thermophotovoltaic (TPV) cells allow for the direct conversion of infrared (IR) radiation to electricity, similar to when traditional solar cells are exposed to visible light. The objective of this thesis is the development of a computer model of a multijunction TPV cell designed to absorb IR radiation from the primary fluid system of a naval nuclear reactor. This model is then used to determine the feasibility of using this TPV ... |
|
| Inverted Organic Photovoltaic Cells on Lightweight, and Flexible Metal Foil Substrates |
30 MAR 2011 |
15 pages |
| Authors:
Stephen R. Forrest; MICHIGAN UNIV ANN ARBOR
|
| In this program, we demonstrated high-efficiency small-molecule photovoltaic cells based on subphthalocyanine (SubPc)/C60 planar heterojunctions with an inverted layer sequence compared with conventional organic cells. The top-illuminated inverted device achieves a power conversion efficiency of 2.4 0.2%, or approximately 75% that of a conventional planar SubPc/C60 solar cell on indium-tin-oxide-coated glass (with a power efficiency of 3.3 0.1%). The open-circuit voltage of the inverted devices, optimized by tailoring the work ... |
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| Novel Concepts for Light Management in Flexible Photovoltaics |
24 FEB 2011 |
59 pages |
| Authors:
Ethan Klem; Michael Dickey; Jay Lewis; RESEARCH TRIANGLE INST (RTI) RESEARCH TRIANGLE PARK NC
|
| This one year project explored novel concepts for light management in light weight, flexible solar cells by engineering surface topography to enhance the overall efficiency of photovoltaic (PV) devices. During the project methods were developed to enable the fabrication of PV substrates with corrugated, buckled surfaces formed by thermal, mechanical, and chemical processes. These substrates were then used in the fabrication of PV devices based upon thin film small molecule ... |
|
| Development and Characterization of New Donor-Acceptor Conjugated Polymers and Fullerene Nanoparticles for High Performance Bulk Heterojunction Solar Cells |
14 JAN 2011 |
6 pages |
| Authors:
Kung-Hwa Wei; Alex K. Jen; NATIONAL CHIAO TUNG UNIV HSINCHU (TAIWAN) DEPT OF MATERIALS SCIENCE
|
| Bithiophene/thieno[3,4-c]pyrrole-4,6-dione (TPD)-based donor-acceptor polymer, PBTTPD, that exhibits high crystallinity and a low-lying highest occupied molecular orbital was prepared. A device incorporating a PBTTPD/[6,6]-phenyl-C61-butyric acid methyl ester blend (1:1.5, w/w) displayed an open circuit voltage of 0.95 V and a power conversion efficiency of 4.7%. A molecular design concept was introduced to develop a series of new conjugated polymers with donor-pi-bridge-acceptor side chains for high-efficiency polymer solar cells. Different from the ... |
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| Research and Development for Continued Performance Improvement in Flexible a-Si PV |
14 DEC 2010 |
41 pages |
| Authors:
Steven Braymen; POWER FILM INC AMES IA
|
| There are many aspects to power generation from an amorphous silicon tandem solar module as produced by Power Film Inc. These include the tunnel junction between the top and lower layer of the cell, the life time, as affected by the Staebler-Wronski effect, and the band gap of the photon collecting layers. The manufacturing process and source materials have a large impact on each of these areas. In this study, ... |
|
| Photovoltaic (PV) Systems Comparison at Fort Hood |
Jun 2010 |
25 pages |
| Authors:
Heidi A Kaltenhauser; NATIONAL DEFENSE CENTER FOR ENERGY AND ENVIRONMENT JOHNSTOWN PA
|
|
| Development of Silicone Substrates to be Used with CIGS Deposition |
01 FEB 2005 |
62 pages |
| Authors:
Herschel Reese; DOW CORNING CORP MIDLAND MI
|
| During this third and last reporting period of this contract, it was shown that our front runner candidate substrate, that of glass fabric reinforced 106-resin, sustained the high temperature fabrication conditions of CIGS devices and allowed ITN Energy Systems to build initial PV cell prototypes. Although these prototype cells were very crude, with very low efficiency (< 1-2%), low uniformity and numerous cracks and defects, it was also evidence of ... |
|
| A Novel Approach for the Development and Optimization of State-of-the- Art Photovoltaic Devices Using Silvaco |
MAR 2002 |
|
| Authors:
Panayiotis Michalopoulos; NAVAL POSTGRADUATE SCHOOL MONTEREY CA
|
 | 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 muhi-junction solar cells are prepared and are tally simulated. The major stages of the ... |
|
| Ionic and Electronic Transport in Gels and Aerogels |
15 JUL 2001 |
38 pages |
| Authors:
M. Ciszkowska; M. Tomkiewicz; BROOKLYN COLL NY DEPT OF CHEMISTRY
|
| Organic and inorganic gels, and gel-derivatives such as aerogels and xerogels, find numerous applications in areas such as batteries, fuel cells, photoelectrochemical solar cells, photocatalytic devices, supercapacitors, control-release drug delivery systems, separation techniques, and others. Modern microscopic and electrochemical techniques offer the possibility of understanding structural properties of these systems down to almost atomic level. Most of the applications involve solid-liquid interfaces that occupy a significant fraction of the volume ... |
|
| Photoelectrochemical Cells Based on Inhomogeneous Semiconductor Electrodes |
DEC 86 |
|
| Authors:
Arthur B. Ellis; WISCONSIN UNIV-MADISON DEPT OF CHEMISTRY
|
| A dead-layer model based on PL intensity can be applied to two families of inhomogeneous electrodes used in PEC's: isotype heterojunctions and strained-layer superlattices. The dead-layer model assumes that electron-hole pairs formed within a distance on the order of the depletion width do not recombine. This mode was used to map the electric field in the aforementioned inhomogeneous electrodes. The dead-layer model can be refined to yield absolute depletion widths ... |
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| Polymer Blends for Use in Photoelectrochemical Cells for Conversion of Solar Energy to Electricity. |
29 APR 1986 |
|
| Authors:
Terje Skotheim; DEPARTMENT OF THE AIR FORCE WASHINGTON DC
|
| In the parent applications, there is provided a device having a first layer of semiconductive material having a first gap; and a second layer of material having a different band gap; a layer of dry solid polymer electrolyte between said first and second layers; and a layer of a polymer blend of a highly conductive polymer and a solid polymer electrolyte between said dry solid polymer electrolyte and said semiconductor ... |
|
| Charge Transfer in Multiple Site Chemical Systems |
30 MAY 85 |
|
| Authors:
T. J. Meyer; NORTH CAROLINA UNIV AT CHAPEL HILL DEPT OF CHEMISTRY
|
| This report covers work done by the author in both mixed-valence dimers and metallopolymers. Concerning the dimers, crystal structures of related monomers were obtained to judge the adequacy of classical approximations in calculating inner-sphere vibrational trapping. A series of homometallic and heterometallic dimers were prepared and a relationship between redox asymmetry and intervalence transfer absorption band energy was found. Electronic structure was observed in the intervalence transfer absorption band of ... |
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| New Nonvolatile Memory with RAM Capabilities and Intrinsic Radiation Hardness |
OCT 1982 |
|
| Authors:
Philip S. Brody; Emanuel Katzen; HARRY DIAMOND LABS ADELPHI MD
|
| This report describes theoretical and experimental work performed in connection with the development of a new kind of electronic computer memory. The memory is based on a hybrid combination of semiconductor and ferroelectric ceramic elements which uses an anomalous photovoltaic effect found in the ferroelectric ceramics. This memory is a variation on the conventional static or dynamic semiconductor memories in common use. Conventional devices are volatile memories which lose their ... |
|
| Fuel and Electricity Generation from Illumination of Inorganic Interfaces |
27 AUG 1982 |
|
| Authors:
Mark S. Wrighton; MASSACHUSETTS INST OF TECH CAMBRIDGE DEPT OF CHEMISTRY
|
| Semiconductor-based photoelectrochemical devices represent good systems for the sustained, direct conversion of light to chemical or electrical energy. The interfacial structure, energetics, and and redox kinetics control the overall performance of such systems. Examples of improvements in efficiency and durability of photoelectrochemical cells stemming from chemical manipulations at semiconductor/liquid electrolyte interfaces illustrate the critical importance of understanding interface properties. (Author) |
|
| Semiconductor Electrodes. 24. Behavior and Photoelectrochemical Cells Based on p-Type GaAs in Aqueous Solutions. |
01 DEC 1979 |
|
| Authors:
Fu-Ren F. Fan; Allen J. Bard; TEXAS UNIV AT AUSTIN DEPT OF CHEMISTRY
|
| The electrochemical Behavior of single crystal p-type GaAs in aqueous solutions containing several redox couples (I3(-)/I(-), Fe(III)/Fe(II), Sn(IV)/Sn(II), Eu(III)/Eu(II)) in the dark and under irradiation is described. The observation that the difference in potential between that for the onset of photocurrent and the standard potential for the redox couple was 0.4 to 0.5 V, independent of the couple, leads to a revised model for semiconductor/electrolyte solution interface with semiconductors having ... |
|
| Illumination Levels within aids to Navigation Lanterns at Sunrise and Sunset. |
APR 1974 |
|
| Authors:
R. Bates; COAST GUARD RESEARCH AND DEVELOPMENT CENTER GROTON CONN
|
| Cadmium-sulfide photoconductive cells are used as daylight controls for lighted aids to navigation. The purpose of this work was to determine the illumination levels in lanterns and their effect on the operation of daylight controls. An array of standard Coast Guard aids to navigation lanterns was equipped with calibrated illumination meters. Measurements of illumination within the lanterns and in the external horizontal plane, as a function of time before and ... |
|
| Radiation Pyrometer for Gas Turbine Blades. |
SEP 1972 |
|
| Authors:
David A. Rohy; W. A. Compton; SOLAR TURBINES INTERNATIONAL SAN DIEGO CA
|
| This report describes the results of a program that has advanced the concepts and feasibility of radiation pyrometry for measuring the first stage blade temperature in advanced aircraft turbine engines. In this system thermal radiation is accepted from the blades by sensor heads transmitted by high temperature fiber optics to a remote detector housing, and converted into an electrical signal by a silicon photovoltaic cell. This system measures and displays ... |
|
| Solid-State Scan Mosaic Sensors. |
APR 1972 |
|
| Authors:
Paul K. Weimer; Fred G. Durfee; Michael G. Kovac; Lorand H. Meray; RCA LABS PRINCETON NJ
|
| A 512 x 512 element photoconductive image sensor with integrated thin-film scanning decoders has been built and scanned at 30 frames per second on laboratory test equipment. Spurious signals due to switching transients and defects in the decoders gave a poor quality picture. A parallel research effort on a 32 x 44 element silicon photodiode sensor which is scanned internally by bucket-brigade charge transfer registers has yielded very encouraging results. ... |
|
| 1.06 Micron Mosaic Vidicon. |
JAN 1971 |
|
| Authors:
D. A. Keiwit; R. M. Madden; C. L. Indindoli; HUGHES RESEARCH LABS MALIBU CA
|
| The feasibility of using a silicon phototransistor mosaic array as a vidicon target was established. An analysis of device operation indicated that although phototransistor signal gain can be obtained during both the read and write parts of elemental duty cycle, the maximum effective gain is secured by maximizing the read gain. Expressions for read and write gain in terms of the transistor parameters have been derived, and the effect of ... |
|
| Tactical Black and White Facsimile Equipment. |
JUN 1970 |
|
| Authors:
Edward F. Walker; Henry G. M. Vaughan; John W. Draper; Peter F. Rehn; Jeffery Bills; PLESSEY TELECOMMUNICATIONS PTY LTD MEADOWBANK (AUSTRALIA)
|
| This report on the development and manufacture of two identical Tactical Black and White Facsimile Equipments describes the results achieved during the period 1st March, 1970 to 31st May, 1970. |
|
| Gallium-Arsenide Photoelectric Receiving Devices, |
13 FEB 1970 |
|
| Authors:
Michal Korwin-Pawlowski; FOREIGN TECHNOLOGY DIV WRIGHT-PATTERSON AFB OHIO
|
| A review of the state of the art in galium arsenide photoelectric devices for radiation detection and energy conversion is made, based on recent foreign publications. The construction, fabrication techniques and pro perties of various kinds of photoresistors, photodiodes and solar cells made of GaAs are described. (Author) |
|
| Engineering Test (Desert) of Effluent Fuel Tester, Totamitor, 50 GPM and 400 GPM. |
JAN 1969 |
50 pages |
| Authors:
L. D. Powell; YUMA PROVING GROUND AZ
|
| The desert engineering test of the Effluent Fuel Tester, Totamitor, (EFTT) 50 and 400 gallons per minute rated capacities, was conducted by and at Yuma Proving Ground. The purpose of the test was to determine the ability of the EFTT's to meet the approved military characteristics in the desert environment. It was recommended the test items, after redesign, and the maintenance package, after updating, be resubmitted for test. |
|
| PRINCIPLES OF THE PHYSICS OF SEMICONDUCTOR DEVICES, |
09 JAN 1968 |
|
| Authors:
Ya. A. Fedotov; FOREIGN TECHNOLOGY DIV WRIGHT-PATTERSON AFB OHIO
|
| The monograph examines physical processes in semiconductor devices which determine their parameters and characteristics, peculiarities of circuit application, stability of parameters of semiconductor devices, and their reliability. A short description of the principle electrophysical properties of semiconductor materials is given along with basic information about the construction and technology of semiconductor devices and perspectives for the development of semiconductor technology. |
|
| STUDY OF GERMANIUM DEVICES FOR USE IN A THERMOPHOTOVOLTAIC CONVERTER. |
NOV 1967 |
|
| Authors:
R. W. Beck; E. H. Sayers; GENERAL MOTORS CORP KOKOMO IN DELCO RADIO DIV
|
| Investigations of P+/N and non-absorptive devices, which are reported in detail in the first progress report, are summarized. Current work includes engineering investigations and optimization of the N/P+ fabrication process. Power outputs in excess of 900 mw per device in a flux of 14.0 watt/sq cm have been observed on optimized units. Measurements of effective minority carrier lifetime and equivalent nonchromatic conversion efficiency are described. An experimental model is presented ... |
|
| SIX CHANNEL SIGNAL RECOGNITION SYSTEM. |
28 APR 1967 |
|
| Authors:
John W. Martin; Oliver H. Baust; BENDIX CORP BALTIMORE MD BENDIX RADIO DIV
|
| This Supplement to the Final Report covers work performed under an extension of the original contract. This work included the evaluation of a polarization cancellation system, evaluation of a feasibility model of an unfolded sideband display system, design and construction of a full channel of unfolded sideband display system, design and construction of a full channel of unfolded sideband display, development of a video AGC technique for use with the ... |
|
| BROADBAND OPTICAL DETECTORS (1.06-MICRON). |
APR 1967 |
|
| Authors:
W. N. Shaunfield; D. W. Boone; Jim Sherer; TEXAS INSTRUMENTS INC DALLAS SEMICONDUCTOR-COMPONENTS DIV
|
| Results obtained during the first half of a program to develop a 1.06-micrometer optical detector are discussed. The detector will contain a germanium avalanche photodiode, thermoelectric cooler, biasing circuit, and preamplifier. Work during this half was concentrated on fabrication of both N(+)P and P(+)N photodiodes with a graded guardring to prevent edge breakdown. Diffusion masking problems prevented successful fabrication of the P(+)N structure; however, good N(+)P diodes were fabricated. Diodes ... |
|
| DESIGN OF AN AIRBORNE LASER BEAM PROFILE MONITOR. |
AUG 1966 |
|
| Authors:
morgan T. Reedy; BALLISTIC RESEARCH LABS ABERDEEN PROVING GROUND MD
|
| A system for sensing and recording the profiles of a CW laser beam on a propagation path of approximately 30 degree elevation and 3 miles slant range was developed. The parameters of interest are beam dispersion and energy density fluctuations due to turbulence effects. (Author) |
|
| IR DETECTOR TEMPERATURE REGULATOR FOR CO VIBRALUMINESCENCE STUDIES. |
25 MAY 1966 |
|
| Authors:
Marshall D. Ketchum; Doran J. Baker; UTAH STATE UNIV LOGAN ELECTRO-DYNAMICS LABS
|
| A temperature regulator for lead sulfide infrared detectors was designed and built. The detector itself was used as the temperature sensing device in the control system. Cold nitrogen gas was used to cool the detector to a temperature below the operating point. A heat exchanger, mounted between the cold source and the detector, warmed the detector to its operating temperature. This regulator and detector were used to study the energy ... |
|
| CONTINUOUS FACSIMILE SCANNER EMPLOYING FIBER OPTICS. |
MAY 1966 |
|
| Authors:
Donald A. Pontarelli; IIT RESEARCH INST CHICAGO ILL
|
| The major achievements of the period covered by this report were: (1) Reduction by several orders of magnitude of the defects occurring at the core-coating interface of fibers. (2) Production of a photographic record essentially free of photometric imperfections by means of a 2.5 inch fiber optics facsimile scanner. (3) Identification of grinding and polishing as a phase which requires further detailed study. (4) Accumulation and cataloging of characteristic photodetector ... |
|
| HE-NE GAS LASER OUTPUT POWER MEASUREMENT USING A SEMICONDUCTOR PHOTODIODE. |
06 JAN 1966 |
|
| Authors:
A. Swit; FOREIGN TECHNOLOGY DIV WRIGHT-PATTERSON AFB OH
|
| The paper discusses the principle of measuring the power of the output radiation from a laser using a germanium photodiode. The properties of the germanium photodiode and calibration of the photodiode using the radiation flux from a perfect black body at a temperature of 1000 K are discussed. Measurement of the radiation flux from a He-Ne gas laser is discussed in detail and formulas and a graph are given which ... |
|
| THIN FILM PHOTOVOLTAIC CELL ARRAY INVESTIGATION. |
NOV 1965 |
|
| Authors:
GENERAL ELECTRIC CO LYNCHBURG VA POLYCRYSTALLINE SEMICONDUCTOR PRODUCTS BUSIN ESS SECTION
|
| A very thin evaporated metal copper precoat on the molybdenum substrate has been shown to result in improved film uniformity and higher cell efficiency. Substitution of antimony for copper chloride in the tailored region produced cells with efficiencies equal to the average 'standard' cell. Spectral response curves are not yet available. It was shown that cadmium chloride could be used as a substitute material in place of gallium to provide ... |
|
| SOLID STATE ANALOG COMPUTER. |
NOV 1965 |
|
| Authors:
Roche J. Deterville; William H. Long; Peter N. Wood; C. A. Bennett; TELEDYNE SYSTEMS CO EL SEGUNDO CA SERVOMECHANISMS DIV
|
| This document describes a development program on the use of electroluminescent (EL) and photoconductive (PC) devices for analog computation. AC servo operation has been achieved, based in part on thin film deposited photoconductors. A module had been designed and several samples made using the 3x3 PC array coupled with three strip EL lamps obtained commercially. These units, along with the necessary electronic circuit elements (amplifier, phase sensitive demodulator, modulator, buffer ... |
|
| THE GAIN ELEMENT IN OPTOELECTRONIC LOGIC BUILDING BLOCKS. |
NOV 1964 |
|
| Authors:
H. Ruegg; STANFORD UNIV CA STANFORD ELECTRONICS LABS
|
| To obtain design criteria for optoelectronic logic building blocks, ways of indirectly amplifying light were compared with respect to signal-propagation delay and power consumption. A system consisting of a junction detector, injection luminescent diodes, and an electronic amplifier was used as a model. Consistent with the gain-bandwidth limitations of the electronic amplifiers, the propagation delay was proportional to the power gain required from the electronic amplifier. This power gain was ... |
|
| LOW-LEVEL, LOW-FREQUENCY PHOTOCELL AMPLIFIER, |
28 JUL 1964 |
|
| Authors:
James E. Keele; GEOTECHNICAL CORP GARLAND TX
|
| This report describes development of a low-level, low-frequency photocell amplifier (PCA) having either analog, broad-band FM carrier, or IRIG FM carrier output. A galvanometer with a high natural frequency is used in the input circuit for increased ruggedness. Signal frequencies up to 100 cps may be amplified. The amplifier is capable of detecting a signal of 1.25 x 10 to the minus 18 w in the bandpass from 0.01 to ... |
|
| DEVELOPMENT OF A SOLID-STATE DISPLAY DEVICE. |
MAR 1964 |
|
| Authors:
LEAR SIEGLER INC GRAND RAPIDS MICH
|
| The subject of this report is the development of a solid-state display device utilizing binary inputs. Investigation of various techniques for decoding the binary inputs led to the development of an electroluminescent-photoconductor matrix. Readout is provided by a column of light moving up and down a vertical scale. The column of light is formed by a stack of 1/16 in. electroluminescent lamps spaced 1/32 in. apart. The display produced under ... |
|
| THE DESIGN, MANUFACTURE AND LABORATORY TESTING OF THE VETERANS ADMINISTRATION OBSTACLE DETECTOR MODEL G-5. |
DEC 1963 |
|
| Authors:
BIONIC INSTRUMENTS INC BALA CYNWYD PA
|
| Presented is a description of the design and the manufacture of the G-5 model obstacle detector for use of the blind. Some engineering evaluations made on the finished devices since that time are also presented. (Author) |
|
| LARGE AREA THIN FILM CADMIUM SULFIDE SOLAR CELL ARRAY INVESTIGATION |
JAN 1963 |
|
| Authors:
F.A. SHIRLAND; J.C. SCHAEFER; HARSHAW CHEMICAL CO CLEVELAND OHIO
|
| The major factor ow preventi g cc pta ce of e C S film solar cell as p otovol ic conver er for p c u illi ry power sys ems is that it is un es unproven in the space enviro . T TI G OF HE C S fil cell under the conditions of space and the conditions tha ... |
|
| PROOF TEST OF AN/TVS-1(XE-3) FLASH-RANGING EQUIPMENT, |
24 JAN 1961 |
|
| Authors:
G. D. Scarborough; J. S. Van Sant; ARMY ARTILLERY BOARD FORT SILL OK
|
| The overall objective of this project was to evaluate the Peerless flash-ranging set, AN/TVS1(XE-3), prior to its acceptance by the United States Army Signal Research and Development Laboratory (ASRDL). The specific objectives were to determine the operational capability of two types of automatic shutter-activating units and to compile data on shutter speeds and filter values at different ranges from point of burst of various low-yield nuclear devices. The project participated ... |
|
| INTRINSIC CALIBRATION OF THE PHOTO-ELECTRIC CONDENSATION NUCLEUS COUNTER MODEL 1957 WITH COVERGENT LIGHT-BEAM |
30 SEP 1960 |
|
| Authors:
L.W. POLLAK; A.L. METNIEKS; DUBLIN INST FOR ADVANCED STUDIES (IRELAND)
|
|
| INVESTIGATION OF COMPOSITE OR STACKED VARIABLE ENERGY GAP PHOTOVOLTAIC SOLAR ENERGY CONVERTER |
31 AUG 1960 |
|
| Authors:
J.W. BURNS; XEROX ELECTRO-OPTICAL SYSTEMS PASADENA CA
|
| A theoretical analysis is given of the performance of composite photovoltaic solar energy converters consisting of two separate p-n junction cells of differing energy gaps. For the ideal case the optimum energy gaps are found to be 1.1 eV and 1.65 eV, and the maximum efficiency 32.5 percent. The optimum energy gaps increase with a departure from the ideal, and the maximum efficiency decreases. A correlation is drawn between the ... |
|
| Summary Report, 31 August 1960. |
31 AUG 1960 |
|
| Authors:
L.W. POLLAK; INSTITUTE FOR ADVANCED STUDIES DUBLIN (IRELAND)
|
| Equipment and methods for counting condensation nuclei and for measuring their size have been perfected. The relative photo-electric nucleus counter has been calibrated under laboratory conditions by means of the absolute stereophotographic nucleus counter. The influence of pressure and temperature on the counting of nuclei has been studied. The effect of various processes taking place in the fog of a photoelectric counter during its operation has been studied. The properties ... |
|
| THE DEVELOPMENT OF A PHOTOMEMORY |
15 AUG 1960 |
|
| Authors:
CARL E. JR. NIELSEN; AMERICAN BRAKE SHOE CO LOS ANGELES CA HYDEL SYSTEMS
|
| THE DEMONSTRATION READING SYSTEM OF THE PHOTOMEMORY PERFORMED RELIABLY ON 0.006 IN WIDE BITS OVER A LIMITED PLATE AREA. SLIGHT IMPROVEMENTS IN THE ILLUMINATION SYSTEM WILL ENABLE THE DEMONSTRATION READER TO PERFORM RELIABLY ON A 2 X 2 IN DATA PLATE CONTAINING 0.004 IN WIDE BITS. THE RESULTS THUS FAR INDICATE THAT THE ULTIMATE DESIRE TO READ A 4 X 4 IN PLATE CONTAINING 09001 X 0.004 BITS IS FEASIBLE. ... |
|
Reports by Keyword(s)
PHOTOELECTRIC CELLS(SEMICONDUCTOR)
