1000681-82-2Relevant academic research and scientific papers
New deep-blue emitting materials based on fully substituted ethylene derivatives
Kim, Soo-Kang,Park, Young-Il,Kang, In-Nam,Park, Jong-Wook
experimental part, p. 4670 - 4678 (2009/09/25)
New blue fluorescent compounds containing tetra-substituted ethylene moieties have been designed and synthesized. These materials, 1,2-di(4′-tert-butylphenyl)-1,2-bis(4′-(anthracene-9-yl)phenyl) ethene [BPBAPE, 1A], 1,2-diphenyl-1,2-bis(4′-(anthracene-9-yl)phenyl) ethene [PBAPE, 1B], 9,10-bis(4-(1,2,2-tris(4-tert-butylphenyl)vinyl)phenyl) anthracene [BTBPPA, 2A], and 9,10-bis(4-(1,2,2-triphenylvinyl)phenyl)anthracene [BTPPA, 2B], 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-1 (10.33 cd A -1 at 8.1 V) for BPBAPE [1A] and 1.82 lm W-1 (3.93 cd A-1 at 6.8 V) for BTPPA [2B] at 10 mA cm-2. The maxima in the electroluminescence spectra of ITO/2-TNATA (60 nm)/NPB (15 nm)/BPBAPE [1A] and BTPPA [2B] (30 nm)/Alq3 (30 nm)/LiF (1 nm)/Al (200 nm) devices were found to be 475 and 452 nm respectively. The BPBAPE [1A] and BTPPA [2B] devices exhibited sky blue emission (0.195, 0.303) and deep blue emission (0.159, 0.135) at 10 mA cm-2 respectively. The Royal Society of Chemistry.
