Poly‐(p‐phenylene vinylenes) with pendent 2,4‐difluorophenyl and fluorenyl moieties: Synthesis,characterization, and device performance |
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| Authors: | Shengbiao Li Ping Zhao Yanqin Huang Tingcheng Li Chao Tang Rui Zhu Lei Zhao Quli Fan Shiqiang Huang Zushun Xu Wei Huang |
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| Institution: | 1. College of Chemistry, Huazhong Normal University, Wuhan 430079, People's Republic of China;2. Institute of Advanced Materials, Fudan University, Shanghai 200433, People's Republic of China;3. Institute of Advanced Materials (IAM), Nanjing University of Posts and Telecommunications, Nanjing 210003, People's Republic of China;4. Ministry of Education Key Laboratory for the Synthesis and Application of Organic Functional Molecules, Hubei University, Wuhan 430062, People's Republic of China |
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| Abstract: | To improve efficiency, processability, and stability, three novel poly‐(p‐phenylene vinylenes) (PPVs) derivatives ( P a , P b , and P c ) with pendent 2,4‐difluorophenyl and fluorenyl moieties were synthesized via Gilch reaction. Their structures were characterized by 1H NMR, 13C NMR, and ELEM. ANAL . Compared with those of PPV and MEH‐PPV, the absolute quantum efficiencies of these polymers showed remarkable improvement (measured at 38.7, 37.2, and 20.3%, respectively), which can be attributed to the presence of twisted multiaryl segments and fluorine atoms. TGA revealed that the inflection temperatures of their thermal decomposition curves were above 400 °C. Double‐layered electroluminescent devices with these polymers as light‐emitting layers ITO/PEDOT:PSS/Polymer/Ba/Al] showed peak emissions at 493/515, 503, and 600 nm and maximum luminance of 2700, 450, and 4700 cd/m2 for P a , P b , and P c , respectively, with onset voltages of ～4 V. © 2009 Wiley Periodicals, Inc. J Polym Sci Part A: Polym Chem 47: 2500–2508, 2009 |
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| Keywords: | conjugated polymers poly‐(p‐phenylenevinylenes) (PPVs) fluorine synthesis polymeric light‐emitting devices (PLEDs) |
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