| 초록 |
Three bipolar blue fluorescent materials were newly synthesized by attaching diphenylamine (DPA), triphenylamine (TPA), and 9-phenylcarbazole amine (PCA) as an electron donating group and 2,4- diphenyl-1,3,5-triazine (DPT) as an electron withdrawing group to the dual anthracene core moiety. Compounds are [10’-(4,6- Diphenyl-[1,3,5]triazin-2-yl)-[9,9’]bianthracenyl-10-yl]-diphenyl-amine (DPA-AA-DPT), {4-[10’-(4,6-Diphenyl-[1,3,5]triazin-2-yl)-[9,9’]bianthracenyl-10-yl]-phenyl}-diphenyl- amine (TPA-AA-DPT), and 9-(4-(10’-(4,6-diphenyl-1,3,5-triazin-2-yl)[9,90-bianthracen]-10-yl)phenyl)- 9H-carbazole (PCA-AA-DPT), respectively. Newly bipolar materials were found to have blue emission in the solution state and to acquire high PLQY values. A device doped with PCA-AA- DPT showed a very high efficiency of 6.86 cd/A and EQE of 5.53% at a high current density without roll-off phenomenon. |
