New light emitting materials: Alternating copolymers with hole transport and emitting chromophores

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	New light emitting materials: Alternating copolymers with hole transport and emitting chromophores
	Zheng, M; Bai, FL; Zhu, DB
刊名	JOURNAL OF APPLIED POLYMER SCIENCE
	1999-12-27
卷号	74 期号:14 页码:3351-3358
关键词	Triphenylamine Ppv Charge-transfer Complex
ISSN号	0021-8995
英文摘要	A new type of novel high-efficiency light-emitting nitrogen-containing poly(phenylene vinylene) (PPV)-related copolymers, which have hole-transfer moieties such as triphenylamine (TPA) and conjugated aromatic units such as 4,4'-biphenylene, 1,4-phenylene, 2,5-dimethyl-1,4-phenylene, 1,4- or 1,5-naphthylene, and 9,10-anthrylene, was designed and synthesized by the well-known Wittig-Hornor reaction. The resulting alternating copolymers were highly soluble in common organic solvents. They can spin-cast onto various substrates to give highly transparent homogeneous thin films without heat treatment. The introduction of TPA units in the PPV backbone improved processibility and limited the pi-conjugation length. Furthermore, the additional pi-electron delocalization between the lone-paired electron in the nitrogen atom and pi-electrons in the conjugated units contributed to the improvement of the fluorescence quantum yields of these copolymers. All these alternating copolymers except TPA-PAV have high-efficiency photoluminescence and they are Very promising for light-emitting diodes (LEDs). It is very promising that TPA-PAV will emit white light when used in LED device due to the broad emission spectra. The origin of the broad spectrum is contributed by the charge-transfer complex formation, which can be proved by the absorption and emission spectra of TPA-PAV solutions. When the aromatic units were 1,4-phenylene, 1,4- or 1,5-naphthylene, 4,4'-biphenylene, and 9,10-anthrylene, respectively, with increase of the capability to accept electrons in aromatic units, the charge transfer from TPA to aromatic units occurred; consequently, the fluorescence quantum yield decreased. The introduction of the alkoxy-substitute group on the aromatic units in the polymer backbone caused the red shift of the absorption and emission spectra of the copolymers due to the stronger delocalization of the ir-conjugated system. (C) 1999 John Wiley & Sons, Inc.
语种	英语
出版者	JOHN WILEY & SONS INC
WOS记录号	WOS:000083536800008
内容类型	期刊论文
源URL	[http://ir.iccas.ac.cn/handle/121111/75211]
专题	中国科学院化学研究所
通讯作者	Bai, FL
作者单位	Chinese Acad Sci, Inst Chem, Lab Organ Solids, Beijing 100080, Peoples R China
推荐引用方式 GB/T 7714	Zheng, M,Bai, FL,Zhu, DB. New light emitting materials: Alternating copolymers with hole transport and emitting chromophores[J]. JOURNAL OF APPLIED POLYMER SCIENCE,1999,74(14):3351-3358.
APA	Zheng, M,Bai, FL,&Zhu, DB.(1999).New light emitting materials: Alternating copolymers with hole transport and emitting chromophores.JOURNAL OF APPLIED POLYMER SCIENCE,74(14),3351-3358.
MLA	Zheng, M,et al."New light emitting materials: Alternating copolymers with hole transport and emitting chromophores".JOURNAL OF APPLIED POLYMER SCIENCE 74.14(1999):3351-3358.