| 초록 |
Blue emitting materials, AC-P, AC-DP and AC-TP were synthesized through boration and Suzuki aryl-aryl coupling reaction. We have demonstrated that the EL performance of blue light-emitters can be optimized and improved by varying the chemical structures of the side groups. In the thin film state, the three materials exhibit PLmax values in the range of 442~456nm. We fabricated EL device with the synthesized compounds in the following configuration: ITO/2-TNATA 60nm/NPB 15nm/ synthesized blue emitting materials 30nm/TPBi 20nm/LiF 1nm/Al 200nm. The current efficiency and CIE value of AC-TP were 4.12 cd/A and (0.15, 0.12). Introduction of a bulky and non-planar side group should help to prevent π-π* stacking interaction, which should lead to the formation of more reliable amorphous film. This is expected to have a positive effect on the high efficiency of the operating OLED device. |
