Conveners
Crystallization and Crystal Growth Processes
- Petra Becker-Bohatý
Off-stoichiometric kesterite-type Cu2ZnSnSe4 (CZTSe) is doped with Li, Na, K by two different methods. Adding dopants as chlorides directly during the solid-state synthesis from pure elements is compared to a post deposition approach. The samples are analysed by XRD with subsequent Rietveld refinements in combination with EMPA for spatially resolved compositional information and bandgap energy...
Gallium arsenide is one of the most important materials for optoelectronic. During manufacturing, the presence of like dislocations may influence the fabrication yield and the performance of the devices. This study provides a deeper understanding of dislocation generation and development in GaAs wafers with mechanical surface damage exposed to thermally induced stress investigated by X-ray...
(Mg,Zr):SrGa12O19 (SGMZ) single crystals are analyzed by lab-based X-ray imaging techniques to study the interplay of compositional variations and local stress. Based on quantitative rocking curve imaging, we can disentangle lattice strain due to stress and composition changes. We found that the formation of a small (0001) facet at the center of the growth interface leads to reduced dopant...
Polymorphism study is essential for selecting the most adequate solid form for a drug product. Therefore, it is always recommended to conduct a thorough search of the crystalline solid forms.
An effective approach for solid form screening combined with crystal structure determination is of considerable importance. However, as growth of suitable crystals for X-ray crystallography may be time...
Polymer-assisted grinding is shown to be an effective method to remove solvent molecules from a crystal solvate. The desolvation can be tuned based on polymer type and amount. Products are characterized by x-ray diffraction, pair distribution function analysis, Raman spectroscopy, and theoretical energy calculations to investigate the structural implications and mechanism at hand.
