Solid-state light-emitting devices have been fabricated by using blends of a binuclear complex of ruthenium(II), with both 1,6-bis[4-(4'-methyl-2,2'-bipyridyl)]hexane and regular 2,2'-bipyridine ligands and lithium trifluorosulfonate/18-crown-6 ether complex. Orange light is emitted for low turn on voltage, i.e. ranging from 2.5-3V, close to the electrochemical gap of the binuclear Ru-based complex. However, the device performances decrease upon operation within few hours. We report that the main degradation process involved in the decrease of the light emission intensity during device operation is based on an electrochemical degradation of the ruthenium complex, mainly a loss of capacity on the reduction side.