| 초록 |
New blue fluorescent compounds containing tetra-substituted ethylene moieties have been designed and synthesized. These materials, 1,2-di(4'-t-butylphenyl)-1,2-bis(4'-(anthracene-9-yl)phenyl)ethene [BPBAPE, 4A], 1,2-diphenyl-1,2-bis(4'-(anthracene-9-yl)phenyl)ethene [PBAPE, 4B], 9,10-bis(4-(1,2,2-tris(4-t-butylphenyl)vinyl)phenyl)anthracene [BTBPPA, 5A], and 9,10-bis(4-(1,2,2-triphenylvinyl)phenyl)anthracene [BTPPA, 5B] were synthesized through Suzuki and McMurry reactions. By fabricating multilayered non-doped OLED devices using these new blue materials, we achieved luminance efficiencies of 4.00 lm/W (10.33 cd/A at 8.1 V) for BPBAPE [4A] and 1.82 lm/W (3.93 cd/A at 6.8 V) for BTPPA [5B] at 10 mA/cm2. The BPBAPE [4A] and BTPPA [5B] devices exhibited sky blue emission (0.195, 0.303) and deep blue emission (0.159, 0.135) at 10 mA/cm2 respectively. |
