Synthesis and Characterization of Bipolar Blue-emitting Poly(spirobifluorene)s Containing Carbazole and Arylphosphine Oxide

doi:10.11777/j.issn1000-3304.2018.17193

CORC > 化学研究所 > 中国科学院化学研究所

	Synthesis and Characterization of Bipolar Blue-emitting Poly(spirobifluorene)s Containing Carbazole and Arylphosphine Oxide
	Wang, Xu-chao 1; Bai, Ke-yan 1,2; Ding, Jun-qiao 1; Wang, Li-xiang 1
刊名	ACTA POLYMERICA SINICA
	2018-02-01
期号	2 页码:239-247
关键词	Poly(Spirobifluorenen)s Bipolar Transporting Carbazole Arylphosphine Oxide Pleds
ISSN号	1000-3304
DOI	10.11777/j.issn1000-3304.2018.17193
英文摘要	A series of bipolar blue-emitting poly(spirobifluorene)s, named PSFCzPO10, PSFCzPO20 and PSFCzPO30, have been designed and synthesized via Suzuki polycondensation, where carbazole and arylphosphine oxide are incorporated as the hole- and electron-transporting units, respectively. These resultant poly(spirobifluorene)s are thermally stable with decomposition temperatures up to 380 degrees C and no glass transition or melting behaviors are observed in the range of 25 - 280 degrees C, which are beneficial for the fabrication of long-trem PLEDs. Moreover, compared to the reference polymer Cz-PSF only containing carbazole, the introduction of the arylphosphine oxide unit does not obviously affect their photoluminescence (PL) and the corresponding PL quantum yields of PSFCzPO10 - PSFCzPO30 in solid states. However, with increasing content of the arylphosphine oxide, the lowest unoccupied molecular orbital (LUMO) levels are lowered from -2.22 eV for Cz-PSF to -2.68 eV for PSFCzPO30, whereas the highest occupied molecular orbital (HOMO) levels remain nearly unchanged (-5.39 similar to -5.40 eV). This trend implies the favored electron injection and transporting although the hole injection barriers seem to be the same for all the polymers. That is, the bipolar transporting and thus charge balance to some degree are within our expectation for PSFCzPO10 - PSFCzPO30. Among them, PSFCzPO10 exhibits the best current efficiency of 1.19 cd A(-1) based on a single-layer device structure, which is about twofolds higher than that of Cz-PSF (0.39 cd A-1). In addition, with PSFCzPO10 as the emitting layer and TPPO as the alcohol-soluble electron-transporting layer, the corresponding all-solution-processed multilayer device is successfully assembled through orthogonal sequential solvent processing. And its current efficiency is further up to 1.93 cd A(-1) together with CIE coordinates of (0.16, 0.14). Meanwhile, the electroluminescence is nearly independent of the driving voltages, indicative of the good blue spectral stability. These results clearly demonstrate that the bipolar design is a promising strategy to improve the efficiency and stability of blue-emitting poly(spirobifluorene)s applied in PLEDs.
语种	英语
出版者	SCIENCE PRESS
WOS记录号	WOS:000429059200011
内容类型	期刊论文
源URL	[http://ir.iccas.ac.cn/handle/121111/45981]
专题	中国科学院化学研究所
通讯作者	Ding, Jun-qiao; Wang, Li-xiang
作者单位	1.Chinese Acad Sci, Changchun Inst Appl Chem, State Key Lab Polymer Phys & Chem, Changchun 130022, Jilin, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
推荐引用方式 GB/T 7714	Wang, Xu-chao,Bai, Ke-yan,Ding, Jun-qiao,et al. Synthesis and Characterization of Bipolar Blue-emitting Poly(spirobifluorene)s Containing Carbazole and Arylphosphine Oxide[J]. ACTA POLYMERICA SINICA,2018(2):239-247.
APA	Wang, Xu-chao,Bai, Ke-yan,Ding, Jun-qiao,&Wang, Li-xiang.(2018).Synthesis and Characterization of Bipolar Blue-emitting Poly(spirobifluorene)s Containing Carbazole and Arylphosphine Oxide.ACTA POLYMERICA SINICA(2),239-247.
MLA	Wang, Xu-chao,et al."Synthesis and Characterization of Bipolar Blue-emitting Poly(spirobifluorene)s Containing Carbazole and Arylphosphine Oxide".ACTA POLYMERICA SINICA .2(2018):239-247.