Synthesis, Photophysics, and Electroluminescence of Mesogen-Jacketed 2D Conjugated Copolymers Based on Fluorene-Thiophene-Oxadiazole Derivative

doi:10.1021/ma802414s

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	Synthesis, Photophysics, and Electroluminescence of Mesogen-Jacketed 2D Conjugated Copolymers Based on Fluorene-Thiophene-Oxadiazole Derivative
	Yang, Qian; Jin, Hao; Xu, Yiding; Wang, Ping; Liang, Xiaochao; Shen, Zhihao; Chen, Xiaofang; Zou, Dechun; Fan, Xinghe; Zhou, Qifeng
刊名	MACROMOLECULES
	2009-02-24
卷号	42 期号:4 页码:1037-1046
ISSN号	0024-9297
DOI	10.1021/ma802414s
英文摘要	A novel monomer 3-{2,5-bis[(4-hexadecyloxy-phenyl)-1,3,4-oxadiazole]phenyl}-2,5-dibromothiophene (MJTO) was copolymerized with 9,9'-dioctylfluorene to generate a series of new conjugated copolymers (PFT0.1, PFT0.5, PFT1, PFT5, PFT10, PFT25, and PFT50) by Suzuki Coupling reaction. They were characterized by molecular weight determination, (1)H NMR, elemental analysis, TGA, DSC. UV-vis absorption. emission spectroscopy, and cyclic voltammetry. The copolymers exhibited high decomposition temperatures reaching 417 degrees C and high T(g) values reaching 145 degrees C. The photophysical properties were greatly influenced by the content of the MJTO monomer. The copolymers ill Solution and film states of PFT25 and PFT50 showed two distinct absorption peaks cort-responding to absorptions from the electron-transport side chain and file hole-transport backbone, respectively, instead of a single peak when MJTO content was below 10.79%. The copolymers in Solution with MJTO content below 10.79% shared similar emission spectra, whereas PFT25 and PFT50 showed absolutely different emission that red-shifted a lot, In the film state, the emission spectra gradually red-shifted when the MJTO content increased. The HOMO and LUMO energy levels were both lower than those of PF, which resulted in better electron injection and transport but still blue-green emission. Light-emitting diode devices were fabricated with a configuration of ITO/PEDOT-PSS/polymer/Ca (20 nm)/Al (70 nm) for all polymers. Among those devices, PFT5 attained brightness of 5558 cd/m(2) and current efficiency of 0.39 cd/A, which proved that the introduction of a proper ratio of the novel thiophene-oxadiazole comonomer to PF could largely improve its EL properties.
语种	英语
出版者	AMER CHEMICAL SOC
WOS记录号	WOS:000263429700024
内容类型	期刊论文
源URL	[http://ir.iccas.ac.cn/handle/121111/66049]
专题	中国科学院化学研究所
通讯作者	Shen, Zhihao
作者单位	Peking Univ, Coll Chem & Mol Engn, Beijing Natl Lab Mol Sci, Minist Educ,Key Lab Polymer Chem & Phys, Beijing 100871, Peoples R China
推荐引用方式 GB/T 7714	Yang, Qian,Jin, Hao,Xu, Yiding,et al. Synthesis, Photophysics, and Electroluminescence of Mesogen-Jacketed 2D Conjugated Copolymers Based on Fluorene-Thiophene-Oxadiazole Derivative[J]. MACROMOLECULES,2009,42(4):1037-1046.
APA	Yang, Qian.,Jin, Hao.,Xu, Yiding.,Wang, Ping.,Liang, Xiaochao.,...&Zhou, Qifeng.(2009).Synthesis, Photophysics, and Electroluminescence of Mesogen-Jacketed 2D Conjugated Copolymers Based on Fluorene-Thiophene-Oxadiazole Derivative.MACROMOLECULES,42(4),1037-1046.
MLA	Yang, Qian,et al."Synthesis, Photophysics, and Electroluminescence of Mesogen-Jacketed 2D Conjugated Copolymers Based on Fluorene-Thiophene-Oxadiazole Derivative".MACROMOLECULES 42.4(2009):1037-1046.