3-COLOR, TUNABLE, ORGANIC LIGHT-EMITTING DEVICES

An independently controlled, three-color, organic light-emitting devic e was constructed with a vertically stacked pixel architecture that al lows for independent tuning of color, gray scale, and intensity. The 1 2-layer device structure consists of sequentially stacked layers of me tal oxide, amorphous organic, crystalline organic, and metal thin film s deposited by a combination of thermal evaporation and radio-frequenc y sputtering. Each of the three addressable colors is sufficiently bri ght for flat panel video display applications. A novel inverted struct ure is used for the middle device in the stack to lower the maximum dr ive voltage of the compound pixel.