Ter(9,9-diarylflurene)s (TDAFS) exhibit many intriguing properties promising for blue light-emitting devices, such as high thin-film photoluminescence quantum yields (similar to 90%), high glass-transition temperatures (> 200 degreesC), and an unusual ambipolar carrier-transport capability. Successful implementation of a double-heterostructure device configuration that provides effective confinement of both carriers and excitons in TDAFs results in an electroluminescence performance (5.3% external quantum efficiency) promising for application in blue-emitting devices.