Dendron-Jacketed Electrophosphorescent Copolymers: Improved Efficiency and Tunable Emission Color by Partial Energy Transfer

doi:10.1021/ma2018556

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	Dendron-Jacketed Electrophosphorescent Copolymers: Improved Efficiency and Tunable Emission Color by Partial Energy Transfer
	Jin, Hao; Zhang, Wei; Wang, Dan; Chu, Zengze; Shen, Zhihao; Zou, Dechun; Fan, Xinghe; Zhou, Qifeng
刊名	MACROMOLECULES
	2011-12-27
卷号	44 期号:24 页码:9556-9564
ISSN号	0024-9297
DOI	10.1021/ma2018556
英文摘要	A styrene-based phosphorescent monomer VC3DbmIr(ppy)(2) with cyclometalated iridium complex was synthesized. It was then copolymerized with the first-generation dendritic carbazole monomer VC3CbzG1 through the conventional free radical polymerization to obtain a series of electrophosphorescent random copolymers. Characteristic vibrational bands in the FT-IR spectra were utilized to determine the compositions of the copolymers. The glass transition temperatures of the copolymers were about 90 degrees C, and the 5% weight loss temperatures were all above 346 degrees C. All the copolymers exhibited similar absorbing bands of the carbazole units in the UV-vis absorption spectra. In the photoluminescent spectra of the copolymer films, energy transfer was found from the carbazole units to iridium phosphors. No obvious energy transfer was found in the copolymer solutions. Light-emitting diodes were fabricated with two configurations. With increasing iridium content, the electroluminescence of the copolymers shifted from blue to orange and passed through a near-white emission region. After the optimization of the device structure, the device containing the copolymer PCbzG1Ir3 had the best performance with a maximum luminescence of 2441 cd/m(2) and a maximum external quantum efficiency of 0.520%.
语种	英语
出版者	AMER CHEMICAL SOC
WOS记录号	WOS:000298198600010
内容类型	期刊论文
源URL	[http://ir.iccas.ac.cn/handle/121111/72225]
专题	中国科学院化学研究所
通讯作者	Shen, Zhihao
作者单位	Beijing Univ, Coll Chem & Mol Engn, Beijing Natl Lab Mol Sci, Key Lab Polymer Chem & Phys,Minist Educ, Beijing 100871, Peoples R China
推荐引用方式 GB/T 7714	Jin, Hao,Zhang, Wei,Wang, Dan,et al. Dendron-Jacketed Electrophosphorescent Copolymers: Improved Efficiency and Tunable Emission Color by Partial Energy Transfer[J]. MACROMOLECULES,2011,44(24):9556-9564.
APA	Jin, Hao.,Zhang, Wei.,Wang, Dan.,Chu, Zengze.,Shen, Zhihao.,...&Zhou, Qifeng.(2011).Dendron-Jacketed Electrophosphorescent Copolymers: Improved Efficiency and Tunable Emission Color by Partial Energy Transfer.MACROMOLECULES,44(24),9556-9564.
MLA	Jin, Hao,et al."Dendron-Jacketed Electrophosphorescent Copolymers: Improved Efficiency and Tunable Emission Color by Partial Energy Transfer".MACROMOLECULES 44.24(2011):9556-9564.