Synthesis and Characterization of Pyrene-Centered Starburst Oligofluorenes

✍ Scribed by Feng Liu; Wen-Yong Lai; Chao Tang; Hong-Bin Wu; Qing-Quan Chen; Bo Peng; Wei Wei; Wei Huang; Yong Cao

• Publisher: John Wiley and Sons
• Year: 2008
• Tongue: English
• Weight: 180 KB
• Volume: 29
• Category: Article
• ISSN: 1022-1336
• DOI: 10.1002/marc.200700847

✦ Synopsis

Abstract

A series of starburst materials (T1–T3) based on a pyrene core with four oligofluorene arms of different length have been synthesized and characterized. The starburst materials show good film forming ability and sky blue fluorescence. Electroluminescent devices take on a stable blue emission and the device performance increases with an increase in arm length. The single‐layered device made of T3 has a maximum brightness of over 2 700 cd · m^−2^ and a maximum current efficiency of 1.75 cd · A^−1^, which is among the best in starburst material devices. The morphology of T1–T3 has been studied by atomic force microscopy. The starburst oligofluorenes with different arm lengths show a distinctive texture, which indicates the size dependent morphology of the starburst materials.

magnified image