An organic light-emitting device with improved performance including an anode formed over a substrate; a light-emitting layer formed over the anode for producing light in response to hole-electron recombination; and a performance-enhancing layer formed over the light-emitting layer including one or more chemical reducing materials selected to improve the performance of the organic light-emitting device. The device also includes an electron-transporting layer formed over the performance-enhancing layer, and a cathode formed over the electron-transporting layer.