The preparation and characterization of electroless Ni and NiTe2 back-contacts to CdTe/CdS solar cells are described. NiTe2, formed by a modification of the electroless Ni process, produces cells with PV properties superior (efficiencies > 10% have been obtained) to those contacted with electroless Ni. NiTe2-contacts offer promising cell-stability in dry air, but exhibit reversible degradation on exposure to ambient H2O vapor.