Preparation of Novel Fused Ring Spiro[benzotetraphene-fluorene] Derivatives and Application for Deep-Blue Host Materials
作者:Min-Ji Kim、Chil-Won Lee、Myoung-Seon Gong
DOI:10.5012/bkcs.2014.35.6.1639
日期:2014.6.20
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.
一系列新型融合环螺旋化合物,螺旋[苯并[ij]四苯-7,9'-芴](SBTF)衍生物,含有在C3和C10位置的封端芳基取代基,经过多步铃木偶联反应设计和合成。3-(1-萘基)-10-苯基SBTF(1N-PSBTF)、3-(2-萘基)-10-苯基SBTF(2N-PSBTF)和3-[4-(1-萘基)苯基]-10-苯基SBTF(NP-PSBTF)显示出改善的玻璃化转变温度($T_g$)和良好的热稳定性。对它们的光物理、 electrochemical 和电致发光特性进行了研究,并用它们构建了蓝色有机发光二极管(OLED)。典型的OLED器件表现出优异的性能;基于NP-PSBTF的器件展示了高效的深蓝光发射,最大效率为5.27 cd/A(EQE,4.63%),CIE(x = 0.133,y = 0.144)。根据这些特性,这些深蓝光发射材料在荧光OLED应用中具有足够的潜力。