New oxide phase Cd1−xYxSb2O6 with a wide band gap and high electrical conductivity

Abstract
It was initially found that CdSb2O6, in which a small part of the Cd ions was substituted with Y ions, has characteristics of a transparent conductor. The electrical conductivity at room temperature of the Y‐substituted CdSb2O6 ceramic was larger, by at least 1×100 S cm−1, while that of the nonsubstituted CdSb2O6 was smaller than 10−5 S cm−1. The optical band gap of CdSb2O6 was found to be larger than 4.1 eV by the measurements of diffuse reflectance spectra.