A few of the ruthenium complexes absorb light throughout the visible spectrum, and they are actively researched for the technologies of solar energy. Suppose the compounds based on Ruthenium have been used for light absorption in the solar cells of dye-sensitized, which is a promising new and low-cost solar cell system.Several oxides that are based on ruthenium exhibits very unusual properties, like exotic superconductivity (in its form of strontium ruthenate), a quantum critical point behaviour, and high-temperature ferromagnetism.