Influence of Chemical Composition of Liquid Phase and Growth Process on Physical Properties of Bi2Se3, Bi2Te3 and Bi2Te2Se Compounds

We studied synthesis and crystal growth of Bi2Te3, Bi2Se3 and Bi2Te2Se compounds by means of vertical Bridgman method. Crystals were grown from stoichiometric melts and under different molar ratio of Bi:Te, Bi:Se or Bi:Te:Se. The obtained crystals were characterized by X-ray diffraction analysis, energy dispersive X-ray spectroscopy, scanning electron microscopy, atomic force microscopy, and the Hall effect measurements. Some of the samples demonstrated insulating bulk behavior, by means of resistivity versus temperature measurements.