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Optical, luminescence and EPR spectroscopy of wide band-gap solids in the form of single crystals, thin films, glasses, pwders, optical ceramics and composite materials. Scintillation characteristics under high energy excitation. Spectroscopy of point defects, trap states in the forbidden gap, energy transfer processes in the luminescence...
Optical and photoelectrical spectroscopy of solar cells materials (amorphous silicon, nanocrystalline silicon, microcrystalline silicon, recrystalized silicon, silicon carbides, ZnO, SnO2). Optical model CELL – Monte Carlo modeling of quantum efficiency spectra of thin film silicon solar cells (single or multiple junctions). Study of light...
Modeling of formation of new stable phase from the supersaturated vapor, solution or supercooled melt by homogeneous or heterogeneous nucleation proces. Kinetic of formation of new phase nuclei in closed systems. Nucleation on active centers. Controlled nucleation on nanofibers. Řešitelský tým: Pavel Demo, Zdeněk Kožíšek, Alexej...
Measurement of the hydrogen content at solid surfaces by elastic peak electron spectroscopy. Determination of the attenuation length at the solid surfaces. Assesment of the atomic structure of solid surfaces by photoelectron diffraction and low energy electron diffraction. Characterization of solid surfaces by UV and X-ray induced...
Searching for and preparation of materials - crystals, epitaxial layers, nanostructures and glasses - of high quality and purity with interesting optical properties and with their possible application in laser hosts in near IR range, as neutrons, gama and X-rays radiations detectors in industrial and medical application. Preparation of model...
In the field of complex oxide scintillators the tungstates and doped aluminum perovskites (REAlO3), garnets (RE3Al5O12) and orthosilicates (RE2SiO5) are systematically studied in the form of single crystals, optical ceramics or thin films prepared by the liquid phase epitaxy (LPE), Fig. 1. We focus on the point defects which give rise to trapping...
At 24th European Photovoltaic Solar Energy Conference we reported on a new 3-dimensional design of „folded“ thin film silicon solar cells. It is based on nanostructured substrate glass/ZnO, where ZnO nanocollumns are organized approximately in hexagonal arrangement and amorphous and/or nanocrystalline silicon p-i-n cells are deposited conformally...
In the laboratory of Diamond thin films and carbon nanostructures we have achieved a technological progress in the fabrication of diamond nanostructures. Diamond nanorods and/or nano-needles are fabrucated by dry plasma etching using a metal mask (Fig. 1). All these geometrically ordered nano-patterns suddenly found applications in...
Kinetics of formation of a new phase nuclei in confined systems is complex process due to depletion of a parent phase. As a consequence the critical size of clusters increases similarly as a nucleation barrier. Supercritical clusters (formed during phase transition process) can become undercritical, which has impact on nucleation.
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