Ultrathin Photovoltaic Donor-Acceptor Structure with Opposite Built-in Fields

We discuss organic heterostructures, in which ultrathin layers of an organic material alternate with layers of other organic materials, such as dyes, organic semiconductors or ferroelectric polymers. The study is focused on the distribution of an external electric field and the measurements of the built-in-fields in the donor and acceptor layers within photovoltaic heterostructures. The built-in-fields play an extremely im-portant role in development of organic solar cells, photodetectors, LEDs, transistors, etc. Our investiga-tions are based on the electroabsorption (or Stark spectroscopy) technique. As an example, built-in fields were studied on an organic solar cell heterostructure ITO-CuPc-С60-Al. Two strong built-in fields of oppo-site directions have unexpectedly been found in the bulk of the donor (copper phthalocyanine, CuPc) and acceptor (fullerene, C60) layers under equilibrium conditions. Such a phenomenon has not been observed earlier and owes to the particular accumulation of excess holes trapped at the CuPc / С60 interface. When you are citing the document, use the following link http://essuir.sumdu.edu.ua/handle/123456789/3535

Relativistic Continuum Hartree Bogoliubov Theory for Ground State Properties of Exotic Nuclei

The Relativistic Continuum Hartree-Bogoliubov (RCHB) theory, which properly takes into account the pairing correlation and the coupling to (discretized) continuum via Bogoliubov transformation in a microscopic and self-consistent way, has been reviewed together with its new interpretation of the halo phenomena observed in light nuclei as the scattering of particle pairs into the continuum, the prediction of the exotic phenomena -- giant halos in nuclei near neutron drip line, the reproduction of interaction cross sections and charge-changing cross sections in light exotic nuclei in combination with the Glauber theory, better restoration of pseudospin symmetry in exotic nuclei, predictions of exotic phenomena in hyper nuclei, and new magic numbers in superheavy nuclei, etc. Recent investigations on new effective interactions, the density dependence of the interaction strengthes, the RMF theory on the Woods-Saxon basis, the single particle resonant states, and the resonant BCS (rBCS) method for the pairing correlation, etc. are also presented in some details.Comment: 79 pages. Prog. Part. Nucl. Phys. (2005) in pres

New method in medical tomography based on vibrating wire:bench-test experiment on laser beam

A new method for fast transverse beam profiling, where a vibrating wire is served as a resonant target, has been developed. The speed of scan up to a few hundred mm/s provides opportunity to make a set of beam profiles at different directions of the scan within a reasonable measurement time. This profile set allows us to reconstruct 2D beam profile by filtered back-projection algorithm. The new method may be applied for proton, X-ray, gamma, and neutron beams, and can also be of interest in tomography including medical applications. The method has been tested experimentally by means of laser beams