Young-Min Jeon, Joon-Woo Kim, C. Lee
Oct 1, 2009
Citations
0
Influential Citations
40
Citations
Journal
Dyes and Pigments
Abstract
Abstract Deep blue colored, fluorescent, spiro-type host materials, 5-[4-(1-naphthyl)phenyl]-spiro[fluorene-7,9′-benzofluorene] and 5,9-bis[4-(1-naphthyl)phenyl]-spiro[fluorene-7,9′-benzofluorene] were designed and successfully prepared by the Suzuki reaction. The electroluminescence characteristics of the two compounds as blue host materials doped with blue dopant materials, diphenyl[4-(2-[1,1;4,1]terphenyl-4-yl-vinyl)phenyl]amine and 1,6-bis[( p -trimethylsilylphenyl)amino]pyrene (SPP) were evaluated. The device used comprised ITO/ N , N ′-bis-[4-(di- m -tolylamino)phenyl]- N , N ′-diphenylbiphenyl-4,4′-diamine)/bis[ N -(1-naphthyl)-N-phenyl]benzidine/Host:5% dopant/tris(8-hydroxyquinolinato)aluminium/Al–LiF. The device obtained from 5-[4-(1-naphthyl)phenyl]-spiro[fluorene-7,9′-benzofluorene] doped with 1,6-bis[( p -trimethylsilylphenyl)amino]pyrene displayed high color purity (0.138, 0.138) and high efficiency (3.70 cd/A at 7 V).