Synthesis, Structural and Optical Characterization of Zinc Chalcogenides in NovelSolid State Hosts

摘要

Several series of sodalite analogues of unit cell composition M8X2(TO2)12, whereM is Zn or Cd, X is a chalcogen, and T is a tetrahedral cation B, or Be in combination with Si or Ge, have been prepared. An M4X tetrahedron, which is the first coordination sphere of the bulk semiconductor MX, sits at the center of each sodalite cage. These materials have been structurally characterized by solid state 77Se and 125Te MAS NMR and by power X-ray diffraction. Diffuse reflectance optical absorption spectra are reported for each series. The borates have optical properties similar to the bulk MX whereas the beryllosilicates and germanates exhibit large blue shifts in the absorption spectra.