SEARCH · Engineering Papers
Search indexed NASA NTRS and DOE OSTI research on propulsion, heat transfer, battery materials and energy systems. Follow report and document links to the original sources.
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Effect of high energy electron irradiation on surface recombination properties of germanium p-n junction photovoltaic cells
Impurity photovoltaic effect in cadmium sulfide, noting radiative enhancement of spectral response upon illumination with green light
Effect of surface states and photovoltaic effect on oxide-semiconductor interface
Photovoltaic effects in cadmium telluride-mercury telluride heterostructures
Heat treatment, illumination and darkness effects, and photovoltaic properties of Cu2S-CdS heterojunctions
Poly-N-vinyl carbazole-iodine charge transfer photovoltaic effect spectral and intensity dependence, noting possible radiation detection and energy conversion applications
Photovoltaic effect in group 2-6 compounds
Mechanism for photovoltaic effects in heterojunctions in group 2 to 6 compounds with metallic or quasimetallic barrier layers
Mechanisms of photovoltaic effects in heterojunctions in group 2 to 6 compounds with metallic or quasimetallic barrier layers
It is shown here that much of the recent photoelectron spectroscopy literature describing the onset of pinning in adsorbate-semiconductor systems at low temperature must be reinterpreted in light of surface photovoltaic effects. Two sources of surface charging are discussed, both of which are strongly enhanced at low temperature. The surface photovoltage resulting from separation of electron-hole pairs by the electric field in the depletion region is usually the dominant source of surface potential shifts, and causes flattening of the semiconductor bands. In addition, surface charging due to photoemission into the vacuum may reverse bias a p-type diode at low temperatures, causing increase band bending.
Impurity levels in photovoltaic cells fabricated by evaporating thin copper layer on low resistivity single crystal n-type cadmium sulfide
Temperature effects on photocapacitance properties of photovoltaic cells
The basic mechanism associated with the photovoltaic phenomena observed in the R.F. sputtered BaTiO3/silicon system is presented. Series of measurements of short circuit photocurrents and open circuit photovoltage were made. The composition depth profiles and the interface characteristics of the BaTiO3/silicon system were investigated for a better understanding of the electronic properties. A Scanning Auger Microprobe combined with ion in depth profiling were used.
Trapped charging and photovoltaic performance of Cu2S-CdS cell including heat treatment effects
Research to improve conversion efficiency of cadmium sulfide photovoltaic cells
Presenting results of research effort to improve quality of cadmium sulfide photovoltaic cells
Effects of electron irradiation on surface recombination velocity of n and p type silicon photovoltaic cells of various resistivities
Certain charge transfer complexes formed from organic polymers and iodine generate appreciable voltages at relatively low impedances upon exposure to light. These films show promise in applications requiring chemically and electrically stable films as detectors of optical radiation and as energy converters in photovoltaic cells.