The influence of stacking faults (SFs) and triangular defects (TDs) on the electrical properties of 4H-SiC Schottky barrier diode (SBD) were investigated. The SF types and locations were distinguished and mapped by using room-temperature photoluminescence (PL) and optical microscope. SBDs were fabricated including the location of SF’s and TD’s. The effects of the types of defects and its area portion in the fabricated SBDs were also investigated. Based on the present data, 3C-TD has more harmful effect rather than the other SFs. The fabricated SBDs including SFs showed that increase of area portion of SF’s also resulted increase of specific on resistance of SBDs.
A monoethanolamine based Co(ii)-metallohydrogel can act as a Schottky barrier diode device and a catalyst for single-pot aryl–S bond formation at room temperature.
ABSTRACTWe have studied different metal-silicon-metal (MSM) Schottky barrier photodiodes for the detection of visible and infrared light. We investigated the different Schottky barriers from Ti, Cr and Pt. At infrared wavelengths, the Schottky contacts provide electrons and holes by “internal photoemission” into the Si. The lowest Schottky barrier determines the long wavelength cutoff and the current noise. The temporal response was measured byultrashort (100 fs) laser pulses from a Ti:A1203 laser, which were converted by an optical parametric oscillator to a wavelength of 1.1 to 1.6 μm. The measurements were performed between 30 K and room temperature. The best detectors show a pulse width of 3.2ps FWHM at 1.25 μm wavelength and room temperature. To our knowledge this is the fastest infrared response for silicon based diodes ever reported.
A functionally advanced Ni(II)-metallogel (Ni-D-TA) has been derived through the sonication of Nickel(II) chloride hexahydrate and 4,4'-Dipyridyl, and triethyl amine in N,N-dimethyl formamide solvent at room temperature under ambient conditions....
Scanning microscopy was used to study the surface of human gallstones and the surface of fractures. The specimens were obtained by operation, washed with water, dried at room temperature and shadowcasted with carbon and aluminum. Most of the specimens belong to patients from a series of X-ray follow-up study, examined during the last twenty years. So it was possible to evaluate approximately the age of these gallstones and to get information on the intensity of growing and solving.Cholesterol, a group of bile pigment substances and different salts of calcium, are the main components of human gallstones. By X-ray diffraction technique, infra-red spectroscopy and by chemical analysis it was demonstrated that all three components can be found in any gallstone. In the presence of water cholesterol crystallizes in pane-like plates of the triclinic crystal system.
Room-temperature operation of a titanium supersaturated silicon-based infrared photodetector