ICCAS OpenIR
Highly efficient red electroluminescent polymers with dopant/host system and molecular dispersion feature: polyfluorene as the host and 2,1,3-benzothiadiazole derivatives as the red dopant
Liu, Jun1,2; Chen, Lei1,2; Shao, Shiyang1,2; Xie, Zhiyuan1; Cheng, Yanxiang1; Geng, Yanhou1; Wang, Lixiang1; Jing, Xiabin1; Wang, Fosong1
2008
Source PublicationJOURNAL OF MATERIALS CHEMISTRY
ISSN0959-9428
Volume18Issue:3Pages:319-327
AbstractBy selecting polyfluorene as the polymer host, choosing 2,1,3-benzothiadiazole derivative moieties as the red dopant units and covalently attaching 0.3 mol% of the dopant units to the side chain of the polymer host, we developed a novel series of red electroluminescent polymers of dopant/host system with molecular dispersion feature. Their EL spectra exhibited predominant red emission from the dopant units because of the energy transfer and charge trapping from the polymer backbone to the dopant units. The emission wavelength of the polymers could be tuned by modifying the chemical structures of the dopant units. Single-layer devices (device configuration: ITO/PEDOT : PSS/polymer/Ca/Al) of these polymers emitted red light with a peak at 615 nm, a luminous efficiency of 5.04 cd A(-1) and an external quantum efficiency of 3.47%, or emitted deep-red light with a peak at 650 nm, a luminous efficiency of 1.70 cd A(-1) and an external quantum efficiency of 2.75%. Their high EL efficiencies were due to the energy transfer and charge trapping from the host to the dopant units as well as the molecular dispersion of the dopant units in the host. Increase of the dopant unit content led to increased turn-on voltages and decreased EL efficiencies of the resulting devices.
DOI10.1039/b712562c
Indexed BySCI
Language英语
WOS IDWOS:000252048800009
PublisherROYAL SOC CHEMISTRY
Citation statistics
Cited Times:29[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.iccas.ac.cn/handle/121111/65360
Collection中国科学院化学研究所
Corresponding AuthorWang, Lixiang
Affiliation1.Chinese Acad Sci, Changchun Inst Appl Chem, State Key Lab Polymer Phys & Chem, Changchun 130022, Peoples R China
2.Chinese Acad Sci, Grad Sch, Beijing 100039, Peoples R China
Recommended Citation
GB/T 7714
Liu, Jun,Chen, Lei,Shao, Shiyang,et al. Highly efficient red electroluminescent polymers with dopant/host system and molecular dispersion feature: polyfluorene as the host and 2,1,3-benzothiadiazole derivatives as the red dopant[J]. JOURNAL OF MATERIALS CHEMISTRY,2008,18(3):319-327.
APA Liu, Jun.,Chen, Lei.,Shao, Shiyang.,Xie, Zhiyuan.,Cheng, Yanxiang.,...&Wang, Fosong.(2008).Highly efficient red electroluminescent polymers with dopant/host system and molecular dispersion feature: polyfluorene as the host and 2,1,3-benzothiadiazole derivatives as the red dopant.JOURNAL OF MATERIALS CHEMISTRY,18(3),319-327.
MLA Liu, Jun,et al."Highly efficient red electroluminescent polymers with dopant/host system and molecular dispersion feature: polyfluorene as the host and 2,1,3-benzothiadiazole derivatives as the red dopant".JOURNAL OF MATERIALS CHEMISTRY 18.3(2008):319-327.
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