Abstract:AN INNOVATIVE ALTERNATIVE FOR PREPARING SILICON CARBIDE (SIC)/SIC COMPOSITES INVOLVES THE DIMOX(TM) DIRECTED METAL OXIDATION APPROACH TO FORM A SIC MATRIX. IN THE DIRECTED METAL OXIDATION PROCESS A MOLTEN METAL IS OXIDIZED TO GROW AN OXIDATION REACTION PRODUCT INTO AN ADJACENT PREFORM OF… more
Abstract:The objective of this proposal is to demonstrate innovative methods for improving the interlaminar shear strength of 2-D fiber reinforced ceramic matrix composites. This would yield cost-effective, load bearing, structural components for turbine engine applications. Continuous and chopped ceramic… more
Abstract:RESEARCH ON IN-SITU REMEDIATION OF SUBSURFACE POLLUTION AND HAZARDOUS WASTES INCLUDES STUDIES ON THE IDENTIFICATION OF BACTERIA IN SUCH SITES. THE ORIGINS, DISTRIBUTIONS, AND RELATIONSHIPS TO ENVIRONMENTAL CONDITIONS ARE FACILITATED BY LEARNING THE IDENTITY OF THE BACTERIA PRESENT IN THE SITES. … more
Abstract:THIS PROGRAM WILL DEMONSTRATE HIGH SPECIFIC POWER, LIGHTWEIGHT, FLEXIBLE, THIN SILICON SOLAR CELLS. THESE SOLAR CELLS CAN BE DIRECTLY SUBSTITUTED FOR EXISTING STATE OF THE ART SILICON SOLAR CELLS WITH THE EFFECT OF SIGNIFICANTLY IMPROVING SPECIFIC POWER, POWER/AREA, AND POWER SUPPLY LIFE. THE… more
Abstract:AstroPower is developing a two-junction monolithic tandem solar cell composed of (AlxGa1-x)0.51In.49P lattice matched to GaAs for use as the top cell in a three-junction, two-terminal tandem stack. This tunable bandgap material system is capable of current matching, at 2.03eV, in a two-junction… more
Abstract:ASTROPOWER IS PROPOSING THE DEVELOPMENT OF AN ULTRA-LIGHTWEIGHT, HIGH PERFORMANCE, THIN LIGHT TRAPPING GAAS SOLAR CELL FOR ADVANCED SPACE POWER SYSTEMS. A THIN DEVICE LEADS TO HIGHER PERFORMANCE IN TERMS OF OPEN CIRCUIT VOLTAGE, RADIATION RESISTANCE, AND SPECIFIC POWER. IN A THIN DEVICE, THE… more
Abstract:ASTROPOWER PROPOSES TO DEVELOP A LIGHTWEIGHT, HIGH PERFORMANCE, ULTRA-THIN ELECTROSTATICALLY BONDED GaAs SOLAR CELL WITH COPLANAR BACK CONTACTS. THE INNOVATIVE DESIGN INCORPORATES LIGHT TRAPPING, ADHESIVELESS COVER SLIDE BONDING, AND ELIMINATES GRID SHADING. THIS NOVEL DEVICE WILL EXHIBIT INCREASED… more
Abstract:THE GROWTH AND DEVELOPMENT OF A (GAP)1-X(ZNS)X-BASED MATERIAL IS BEING ENGINEERED TO PREPARE AN UTEROPOLAR, DIRECT BANDGAP MATERIAL. THIS TYPE OF MATERIAL WITH BANDGAP IN EXCESS OF 2.6 EV CAN BE EMPLOYED IN BLUE LIGHT-EMITTING DIODES, AND IN UV DETECTORS CAPABLE OF SUPERIOR PERFORMANCE COMPARED TO… more
Abstract:ASTROPOWER IS DEVELOPING GALLIUM PHOSPHIDE ENERGY CONVERTERS OPTIMIZED FOR RADIO LUMINESCENT LIGHT-BASED POWER SUPPLIES. A "TWO-STEP" OR "INDIRECT" PROCESS IS USED WHERE A PHOSPHOR IS EXCITED BY RADIOACTIVE DECAY PRODUCTS TO PRODUCE LIGHT THAT IS THEN CONVERTED TO ELECTRICITY BY A GAP ENERGY… more
Abstract:The goal is to produce a sign language telephone providing visual communication to the hearing impaired. Currently their only access to telephone conversation is with typed messages using Telephone for the Deaf and Disable. Sign language is a more appropriate and effective communication medium than… more
Abstract:CERAMICS HAVE BEEN SHOWN TO BE VERY EFFECTIVE IN THE DEFEAT OF A WIDE RANGE OF KINETIC ENERGY (KE) THREATS. HOWEVER, THE USE OF CERAMICS IN ARMORED VEHICLES HAS BEEN LIMITED DUE IN MOST PART TO THEIR HIGH COST. CERAMIC PARTICULATE REINFORCED METAL MATRIX COMPOSITES (MMCS) PRODUCED BY PRESSURELESS… more
Abstract:SOLAR CELLS ARE BEING FABRICATED USING THIN FILMS OF SILICON ON INEXPENSIVE, FLEXIBLE CLOTH SUBSTRATES. PHOTOVOLTAIC DEVICES FABRICATED WITH THESE STRUCTURES CAN DEMONSTRATE THE HIGH PERFORMANCE OF CRYSTALLINE SILICON WITH THE LIGHT WEIGHT OF THIN FILM SOLAR CELLS. THE RESULT IS A SOLAR CELL THAT… more
Abstract:AstroPower is developing a highly sensitive UV detector based on epitaxial AlGaP/GaP heterostructures, a promising new material system for ultraviolet detectors. Detecting ultraviolet light is important to spectrophotometry, astronomy, high-energy physics, medicine, UV curing, photoresist exposure,… more
Abstract:AstroPower is developing a new process for the growth of large area, thin film 3C-SiC using a proprietary deposition technique followed by liquid phase epitaxy (LPE). Successful development of the growth process will provide high quality, thin film SiC in typical silicon wafer areas, allowing… more
Abstract:AstroPower will develop a two-junction monolithic tandem solar cell composed of (AlxGa1-x)0.51 In(0.49)P, which is lattice matched to GaAs, as the top cell in a three-junction, two-terminal tandem solar cell. This new tunable bandgap Al-Ga-In-P material is capable of current matching in a… more
Abstract:1 New concepts in optical computing and optical interconnects require hardware developments of generic, compact, multi-element LED source array. A two dementional array of individually-addressable Light-emitting Diode optical emitters will be developed. An innovative CVD/LPE heteropitaxy technique… more
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