P-Type and N-Type Semiconductivities of Solid Yttrium Sulfide

Abstract

Yttrium sulfide disks have been carefully prepared by means of a newly developed sintering method to avoid any contamination. The electrical conductivity has been measured at temperatures from 973K to 1223K and in the PH2S/PH2 range from 10-4 to 102 with the aid of an alternating current (1kHz) bridge. It has been concluded that yttrium sulfide is a pure electronic conductor under the above-mentioned conditions. The specific conductivity is expressed as follows;for n-type range and for p-type rangeThe observed sulfur pressure dependence is attributed to the predominance of fully ionized yttrium interstitials and fully ionized yttrium vacancies.