A color-stable blue organic light-emitting diode is obtained utilizing a solution-processible fluorescent pi-conjugated dendrimer G0 (see image), with a maximum luminance efficiency of 5.3 cd A(-1). Efficient green, red, and white OLEDs are also demonstrated by doping GO with phosphorescent dyes. Combining high device efficiency with solution processibility, GO becomes one of the best blue-emitting materials for fabricating flat-panel displays and white-light lighting panels via solution processing.