Non-Doped Blue OLEDs Based on 9,9′-Dimethylfluorene Containing 10-Naphthylanthracene Derivatives

A series of blue fluorescent materials 1-3 based on 10-(2-napthyl)-anthracene derivatives with the diverse aromatic groups were synthesized and multilayer non-doped devices using them as emitting materials were fabricated. All OLED devices using these materials emit deep blue light of 446-456nm. In particular, device 3 exhibited highly efficient blue emissions with the luminous efficiency of 3.89 cd/A, a power efficiency of 2.47 lm/W, Quantum Efficiency of 3.03% at 20mA/cm(2), and CIEx,y coordinates of (0.163, 0.149) at 6V. Also, device 2 showed the efficient deep-blue emission with CIE coordinates of (x = 0.151, y = 0.104) at 6 V.