Preparation of <i>n</i>-type semiconducting Ge20Bi10Se70 glass

Abstract

Chalcogenide bulk glasses exhibiting n-type conduction were first prepared by quenching the melts of mixtures of Ge, Se, and Bi2Se3 or Bi. The conditions for obtaining homogeneous glasses were examined, and measurements of resistivity and thermoelectric power were carried out on Ge20Bi10Se70 glass, one of the typical n-type semiconducting glasses in the system Ge-Bi-Se. The results indicated that the electrical properties of homogeneous glasses were slightly affected by the difference in starting materials, and the resistivity and thermoelectric power were about 3×107 Ω cm and −1.4 mV/K at room temperature, respectively.