Abstract
The electrical properties of TiSe2 single crystals doped with several impurities have been investigated as a function of the concentration. The electrical resistivity at low temperature is distinctly affected by Nb, Cr and Ni in connection with a localisation of carriers and of complex scattering mechanisms. Crystals of the Ti1-xNbxSe2 system have been grown for the whole range of concentration x. They present properties typical for the 1T and 2H phases. Substituted impurities like Sc and Y appear to behave as acceptors and impurities like Re or Cu as donors.