Electrical and photoconductive properties of SnS2 crystals

Single crystals of SnS2 have been prepared by the vapour transport method. The electrical conductivity of these crystals has been measured along and perpendicular to their c direction by a probe method. The thermal activation energy associated with electrical conduction in the c direction exceeds that in the direction perpendicular to it by about 0·18 eV. The spectral response of photoconductivity measurements showed a band gap of 2·34 eV (at 300 K) with a temperature coefficient of -1·02×10−3 eV K−1.