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Previous testing has indicated that holographic radar can image surficial and shallowly-buried dinosaur tracks if the track surface presents a dielectric contrast. This paper reports on blind scanning of stratigraphic surfaces just above known, exposed trackways. Testing at Valley Quarries Fairfield operation near Gettysburg, PA yielded mixed results that could not be ground-truthed. Additional testing...
Low electron mobility causes the short diffusion length and high resistivity. To realize the tandem solar cells with high performance, the mobility must be increased. In this paper, the mechanisms that reduce electron mobility in GaAs1−xNx (0.0000<x<0.0115) were investigated from the dependence of Hall electron mobility on N composition, temperature and carrier concentration. The mobility was...
The reduction of residual acceptors in GaAsN films and the improvement of GaAsN crystal quality evidenced by hole mobility and PL intensity were reported. Si doping using a SiH4 gas was also studied. Based on these results GaAsN homo-junction solar cells were fabricated by CBE at the first time. The short circuit current, open circuit voltage, fill factor and conversion efficiency of the GaAsN solar...
Films of stage-4 MoCl 5 graphite intercalation compound (GIC) were synthesized from laboratory-prepared high-quality graphite films and their electronic properties such as electrical conductivity, Hall coefficient and transverse magnetoresistance were measured at 300, 77 and 1.3 K. The graphite films were prepared from polyimide films of Kapton (25 μm thick) and pyromellitic dianhydride-p-phenylenediamine-3,3...
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