Controlling the Chain Orientation and Crystal Form of Poly(9,9-dioctylfluorene) Films for Low-Threshold Light-Pumped Lasers

doi:10.1021/acs.macromol.0c02815

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	Controlling the Chain Orientation and Crystal Form of Poly(9,9-dioctylfluorene) Films for Low-Threshold Light-Pumped Lasers
	J. Wang; Y. Liu; D. Zou; Z. Ren; J. Lin; X. Liu and S. Yan
	2021
发表期刊	Macromolecules
ISSN	249297
卷号	54 期号:9 页码:4342-4350
摘要	Neat thin films of semiconducting polymers are attractive as efficient gain media toward optically pumped lasers. However, the optical loss and out-coupling of isotropic polymer thin films are far from being rationally regulated from the perspective of chain orientation and crystal form. Herein, we accomplished a simultaneous control of both chain orientation and crystal form in large-area highly ordered poly(9,9-dioctylfluorene) (PFO) thin films through epitaxial crystallization. The well-arranged PFO lamellae naturally shape a low-loss, graded-index waveguide to provide spatially distributed optical feedback. Moreover, much more horizontally oriented dipoles significantly enhance the light out-coupling efficiency. Thus, the only 65 nm-thickness oriented PFO films demonstrate excellent amplified spontaneous emission with a low excitation threshold (7.1 J/cm2) and a narrow full width at half-maximum (2.2 nm) measured in the perpendicular direction of PFO chains. This strategy opens an effective pathway to prepare high-performance polymer thin-film lasers and electrically pumped polymer lasers. 2021 American Chemical Society.
DOI	10.1021/acs.macromol.0c02815
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收录类别	SCI ; EI
引用统计	被引频次：10[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.ciomp.ac.cn/handle/181722/65114
专题	中国科学院长春光学精密机械与物理研究所
推荐引用方式 GB/T 7714	J. Wang,Y. Liu,D. Zou,et al. Controlling the Chain Orientation and Crystal Form of Poly(9,9-dioctylfluorene) Films for Low-Threshold Light-Pumped Lasers[J]. Macromolecules,2021,54(9):4342-4350.
APA	J. Wang,Y. Liu,D. Zou,Z. Ren,J. Lin,&X. Liu and S. Yan.(2021).Controlling the Chain Orientation and Crystal Form of Poly(9,9-dioctylfluorene) Films for Low-Threshold Light-Pumped Lasers.Macromolecules,54(9),4342-4350.
MLA	J. Wang,et al."Controlling the Chain Orientation and Crystal Form of Poly(9,9-dioctylfluorene) Films for Low-Threshold Light-Pumped Lasers".Macromolecules 54.9(2021):4342-4350.

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