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Chemistry News >
Professor Heribert Wiedemeier revealed novel correlation of Schottky constants with lattice energies for II–VI and I–VII compounds
Professor Heribert Wiedemeier revealed “Novel correlation of Schottky constants with lattice energies for II–VI and I–VII compounds” in 2010 October issue of Journal of Solid State Chemistry 183 (2010) 2317 - 2323.
The performance criteria of many electronic devices are strongly influenced by crystal defects such as vacancies (missing atoms) and other deviations from structural perfection. Experimental measurements of vacancy concentrations are very difficult, time consuming, and sometimes not possible. In connection with theoretical computations of point defect densities (Schottky constants, KS), Prof. Wiedemeier observed a linear dependence of log KS on lattice energies for II-VI and I-VII compounds, yielding a new thermodynamic relation reported in his article in Journal of Solid State Chemistry. His newly derived equations are of basic thermodynamic interest. In particular, it is possible now to estimate the number of vacancies, which is important for the production of crystalline materials with desirable properties.
Posted: December 2010
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