Te precipitates in CdTe have been characterized by Auger spectroscopy, x-ray diffraction, and Raman spectroscopy. The x-ray results show that the precipitated Te in Bridgman-grown CeTe crystals has the same structural phase as observed in elemental Te under high pressure. Auger and Raman microprobe spectroscopy were carried out to confirm Te precipitates in CdTe and identify the symmetry of the Te precipitates.

Articles you may be interested inEffect of deposition interruption and substrate bias on the structure of sputter-deposited yttria-stabilized zirconia thin films Structure and magnetic properties of Co grown on yttria-stabilized cubic zirconia substrates J. Appl. Phys. 91, 7197 (2002); 10.1063/1.1448802Laser-stimulated luminescence of yttria-stabilized cubic zirconia crystalsEvaluation of crystalline quality of heteroepitaxial yttriastabilized zirconia films on silicon by means of ion beam channeling

The direct colorimetric determination of uranium, in the presence of moderate or large amounts of iron, is not possible by other methods. By the 8-quinolinol method, uranium may be determined in the presence of 500 mg. of iron, 50 mg. of copper, 20 mg. of nickel, or 20 mg. of cobalt without prior separations. In conjunction with the hydrolytic separation by which uranium is separated from most of the colored ions but not iron, uranium may be determined colorimetrically, as a routine technique. With an ordinary Beckman spectrophotometer 10 of uranium are easily determined.

High-efficiency GaAlAs/GaAs heterostructure solar cells have been grown by metalorganic chemical vapor deposition (MO−CVD). Simulated air-mass-zero (AM0) short-circuit current densities of 24.5 mA/cm2, open-circuit voltages of 0.99 V, fill factors of 0.74, and efficiencies of 12.8% have been measured on devices without AR coatings (uncorrected for contact area). These cell structures employ a thin (∼520Å) GaAlAs : Zn window and a GaAs : Zn/GaAs : Se p-n junction grown entirely by the MO-CVD process.

In Fig. 6, Eg (opt) vs. CH~% are shown for undoped, P-type and N-type a-SiC:H. The Eg (opt) increases monotonically with increasing CH4% in all cases. But the rates of increase in Eg (opt) with increasing CH4% are different. The order of the rate is as follows: Undoped is the first, N-type the second, and P-type the third. The rate of undoped and N-type are nearly the same. It seems that there is a small shoulder in the curves of Eg (opt) of all the a-SiC: H at nearly 40% of CH4. The Eg (opt) shrinkage was observed only for P-type a-SiC:H with increasing dopant concentration. Summary and DiscussionWe found the clear maxima in ~D in the P-type glowdischarged a-Si: H films. The origin of this peak has not yet been clarified. But it is worthy of note that the dopant and hydrogen form dopant-hydrogen complexes (6). The shoulder of the ~ph of P-type a-SiC: H reported by Tawada et al.(3) seems to be located right above the ~D peak, and the recovery of the cph by boron doping, as reported in the literature, seems to be related to th ~D peak. The peak appears to result from the two curves. One is the up slope curve and the other is the down slope one. It is inferred that the increase in ~D in the up slope curve is caused by more incorporation of boron which becomes electrically active in accordance with the increase in the flow rate of CH4, while the decrease in ~D in the range over 30% of the flow rate of CH4 is concerned v~ith the degradation of quality of the a-SiC:H and increase in Eg (opt) by the higher concentration of carbon. Studies on the origin of the peak in ~'D for the P-type a-SiC:H is presently being planned.ABSTRACT Epitaxial growth of single-crystal Si films has been realized on the (100), (110), and (111) crystallographic planes of yttria-stabilized, cubic zirconia single crystals. The Si films were grown by chemical vapor deposition, using the pyrolysis of Sill4 at temperatures in the range 950 ~ 1075~ and at deposition rates of 0.08-1.2 ~m/min. A predeposition annealing procedure has been developed, resulting in a quasi-stable, oxygen-deficient zirconia surface. A model is presented to explain the dependence of oxygen kinetics in cubic zirconia on temperature and yttria content. The heteroepitaxial Si films have been characterized by optical and scanning electron microscopies, reflection electron diffraction, x-ray diffraction, Rutherford backscattering and channeling, and surface electrical conductivity and Hall effect measurements. Several 0.4-0.5 ~m thick (100)-and (110)-oriented Si films on cubic zirconia were found to be of higher crystal quality than commercial (100) Si on sapphire films of similar thickness.) unless CC License in place (see abstract). ecsdl.org/site/terms_use address. Redistribution subject to ECS terms of use (see 144.122.201.150 Downloaded on 2016-03-28 to IP