Characterization of GaAs Solar Cells under Supercontinuum Long-Time Illumination.

This work is dedicated to the description of the degradation of GaAs solar cells under continuous laser irradiation. Constant and strong exposure of the solar cell was performed over two months. Time-dependent electrical characteristics are presented.

Structure-Properties Relationship of Electrospun PVDF Fibers.

Electrospinning as a versatile technique producing nanofibers was employed to study the influence of the processing parameters and chemical and physical parameters of solutions on poly(vinylidene fluoride) (PVDF) fibers' morphology, crystallinity, phase composition and dielectric and piezoelectric characteristics. PVDF fibrous layers with nano- and micro-sized fiber diameters were prepared by a controlled and reliable electrospinning process. The fibers with diameters from 276 nm to 1392 nm were spun at a voltage of 25 kV-50 kV from the pure PVDF solutions or in the presence of a surfactant-Hexadecyltrimethylammonium bromide (CTAB).