Blue and white emitting organic diodes based on anthracene derivative

Organic light emitting diodes (OLED) with blue or white emission have been made from a new blue emitting material 9,10-bis(3'5'-diaryl)phenyl anthracene (JBEM). The two devices have the same structure except for a red dye doped in JBEM layer of the white device. The white device shows higher quantum efficiency and more than twice stability than that of the blue device. Mmaximum luminance of 14850cd/m(2), quantum efficiency of 1.75% and a half lifetime of 2860h at initial luminance of 100cd/m(2) were achieved. This indicates that the doping is very important for improving the EL properties, particularly the stability. With comparison of a blue device from distyrylarylene derivatives, the blue device using JBEM shows 5 times better stability, indicating JBEM is a promising blue emitter.