Near‐infrared electroluminescence from fluorene‐based copolymers |
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| Authors: | Mingliang Sun Xi Jiang Li Wang Chao He Bin Du Renqiang Yang Yong Cao |
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| Institution: | Institute of Polymer Optoelectronic Materials and Devices, Key Laboratory of Special Functional Materials, South China University of Technology, Guangzhou 510640, People's Republic of China |
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| Abstract: | A series of random low band‐gap conjugated copolymers (PFO‐DDTQ) derived from 9,9‐dioctylfluorene (DOF) and 6,7‐dimethyl‐4,9‐di(4‐hexylthien‐2‐yl)‐1,2,5]thiadiazolo3,4‐g]quinoxalines (DDTQ) are prepared by the palladium‐catalyzed Suzuki coupling reaction. The obtained polymers are readily soluble in common organic solvents. The thin solid films of the polymers absorb light from 300 to 840 nm with two absorbance peaks at around 380 and 710 nm. Electroluminescent peaks are between 0.8 and 0.9 μm based on the polymers. The maximal external quantum efficiency reaches 0.30% with the emission peak at 824 nm from PFO‐DDTQ1 based devices. © 2008 Wiley Periodicals, Inc. J Polym Sci Part A: Polym Chem 46: 3007–3013, 2008 |
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| Keywords: | conjugated polymers fluorescence light‐emitting diodes (LED) near‐infrared electroluminescence |
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