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This research proposes the hot filament chemical vapor deposition (HFCVD) for synthesis of p-type and n-type diamond by doping of boron trioxide (B2O3) and phosphorous pentoxide (P2O5) in ethyl alcohol (C2H5OH), respectively. The synthesis was conducted for 180 h with annealing under hydrogen atmosphere every 60 h to improve the quality of the diamond. Composition of the synthetic diamond was analyzed...
Time-of-Fight technique is an effective way to obtain the drift mobility and recombination life time of CdZnTe crystal. The recombination, drift and diffusion of non-equilibrium carrier all influence the light induced current. But in different time, the attenuation of the photocurrent is relay on different processes. In this letter, we separate the decay of the pulse laser induced current to three...
We report thermoelectric characterization of Bi2-xSbxTe3 (x = 0.5, 1.0, and 1.5) synthesized by a solvothermal method using DMF as solvent. For Bi2Te3, the size of the edge and thickness of the hexagonal nanoplatelets are 200-250 nm and 20-25 nm, respectively. Bi2Te3 nanosheets appear to grow epitaxially from the surface of the Te tubes, which forms in the first step and acts as the template for the...
In this study, we fabricated in-plane thermoelectric micro-generators (4 mm times 4 mm) based on bismuth telluride thin films by using flash evaporation method. The thermoelectric properties of as-grown thin films are lower than those of bulk materials. Therefore the as-grown thin films were annealed in hydrogen at atmospheric pressure for 1 hour in a temperature range of 200 degC. to 400degC. By...
The magnetooptic Kerr effect and electric resistance of Fe deposited on fused quartz substrates were observed during ultra-high vacuum deposition. Resistance measurements show that Fe forms islands on the quartz substrates, and that films with such an island morphology turn into continuous films at about 115 ?? thickness at room temperature. The magnetooptic Kerr effect is observable from a thickness...
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