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http://dx.doi.org/10.5012/bkcs.2014.35.6.1639

Preparation of Novel Fused Ring Spiro[benzotetraphene-fluorene] Derivatives and Application for Deep-Blue Host Materials  

Kim, Min-Ji (Department of Nanobiomedical Science and & BK21 PLUS NBM Global Research Center, Dankook University)
Lee, Chil-Won (Department of Polymer Science and Engineering, Dankook University)
Gong, Myoung-Seon (Department of Nanobiomedical Science and & BK21 PLUS NBM Global Research Center, Dankook University)
Publication Information
Bulletin of the Korean Chemical Society / v.35, no.6, 2014 , pp. 1639-1646 More about this Journal
Abstract
A series of novel fused-ring spiro compounds, spiro[benzo[ij]tetraphene-7,9'-fluorene] (SBTF) derivatives containing an end-capping aryl substituent at both the C3 and C10-positions hasbeen designed and synthesized via multi-step Suzuki coupling reactions. 3-(1-Naphthyl)-10-phenylSBTF (1N-PSBTF), 3-(2-naphthyl)-10-phenylSBTF (2N-PSBTF) and 3-[4-(1-naphthyl)phenyl]-10-phenylSBTF (NP-PSBTF) showed improved glass transition temperatures ($T_g$) with good thermal stability. Their photophysical, electrochemical, and electroluminescent properties were investigated and were used to construct blue organic light emission diodes (OLEDs). The typical OLED devices showed excellent performance; the NP-PSBTF-based device exhibited highly efficient deep blue-light emission with a maximum efficiency of 5.27 cd/A (EQE, 4.63%) with CIE (x = 0.133, y = 0.144). According to these characteristics, these deep-blue light emitting materials have sufficient potential for fluorescent OLED applications.
Keywords
Blue OLED; Deep-blue host; Spiro[benzotetraphene-fluorene]; Color purity; Tetraphene;
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