CeOFeAs is a versatile oxy-arsenide which shows a variety of electrical and magnetic properties. Superconductivity in this system has been achieved by doping electrons through different ionic substitutions by sealed tube reactions at ∼1100°C. The superconducting transition temperature (Tc) and upper critical field (Hc2) could be optimized by substitution of suitable ions at Ce, O and Fe site. The highest Tc obtained was ∼49 K in a Y-doped CeO0.9F0.1FeAs. © 2011 American Institute of Physics.