| 초록 |
A series of novel star-shaped hole transporting materials (HTMs) based on triphenylamine core end-capped with carbazole and triarylamine derivatives have been readily synthesized by Suzuki coupling reactions. The synthetic compounds diphenylamine, derivatives and carbazole derivative With the star-shaped structures, compounds Tris-[4-(3,5-Bis-carbazol-9-yl-phenyl)-phenyl]amine and 9-(4-(4,4,5,5-tetra methyl-1,3,2-dioxaborolan-2-yl)phenyl)-9H-carbazole exhibit very high glass transition temperatures (Tg) of 216℃ and 181℃, respectively and high thermal decomposition temperatures (Td＞500℃). Among the designed HTMs, the device performance based on HTM {4-[(Naphthalen-1-yl-(naphthalene-2-yl)amino)]-phenyl}-diphenylamine is the best and comparable to that of the common N,N′-di(1-naphtyl)-N,N′-diphenyl-(1,1′-biphenyl)-4,4′-diamine(NPB) based device.
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