ICCAS OpenIR
Multifunctional metallophosphors with anti-triplet-triplet annihilation properties for solution-processable electroluminescent devices
Zhou, Gui-Jiang1,3; Wong, Wai-Yeung1,3; Yao, Bing2; Xie, Zhiyuan2; Wang, Lixiang2,3
2008
Source PublicationJOURNAL OF MATERIALS CHEMISTRY
ISSN0959-9428
Volume18Issue:15Pages:1799-1809
AbstractWith the goal to provide organometallic triplet emitters with good hole-injection/hole-transporting properties, highly amorphous character for simple solution-processed organic light-emitting diodes, and negligible triplet-triplet (T-T) annihilation, a series of new phosphorescent cyclometalated Ir(III) and Pt(II) complexes with triphenylamine-anchored fluorenylpyridine dendritic ligands were synthesized and characterized. The photophysical, thermal, electrochemical and electroluminescent properties of these molecules are reported. The incorporation of two sterically hindered electron-rich triphenylamino groups to the 9-position of the fluorene skeleton was found not only to afford triplet emitters in the glassy state with high T(g), but also to elevate the HOMO levels and confer the hole-injection ability to the phosphorescent center. These highly amorphous metal phosphors can serve as doped emitters in a small molecular host for spin-coated emission layer in suitable OLED structures to achieve good device performance with a maximum luminance of 29380 cd m(-2) at 23 V, a peak external quantum efficiency of 7.0%, a luminance efficiency of 21.4 cd A(-1) and a power efficiency of 2.9 lm W(-1). Both the electrophosphorescent device characterization as well as the theoretical simulation results show that these iridium electrophosphors show negligible T-T annihilation even at high operating current densities and moderately high doping levels. Our investigations indicate that attaching the triphenylamino moieties to the fluorene ring is an effective way to overcome the T-T annihilation caused by the strong interactions among the emitting molecules.
DOI10.1039/b718653c
Indexed BySCI
Language英语
WOS IDWOS:000254648100012
PublisherROYAL SOC CHEMISTRY
Citation statistics
Cited Times:99[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.iccas.ac.cn/handle/121111/63380
Collection中国科学院化学研究所
Corresponding AuthorWong, Wai-Yeung
Affiliation1.Hong Kong Baptist Univ, Ctr Adv Luminescence Mat, Kowloon, Hong Kong, Peoples R China
2.Chinese Acad Sci, Changchun Inst Appl Chem, State Key Lab Polymer Phys & Chem, Changchun 130022, Peoples R China
3.Hong Kong Baptist Univ, Dept Chem, Kowloon, Hong Kong, Peoples R China
Recommended Citation
GB/T 7714
Zhou, Gui-Jiang,Wong, Wai-Yeung,Yao, Bing,et al. Multifunctional metallophosphors with anti-triplet-triplet annihilation properties for solution-processable electroluminescent devices[J]. JOURNAL OF MATERIALS CHEMISTRY,2008,18(15):1799-1809.
APA Zhou, Gui-Jiang,Wong, Wai-Yeung,Yao, Bing,Xie, Zhiyuan,&Wang, Lixiang.(2008).Multifunctional metallophosphors with anti-triplet-triplet annihilation properties for solution-processable electroluminescent devices.JOURNAL OF MATERIALS CHEMISTRY,18(15),1799-1809.
MLA Zhou, Gui-Jiang,et al."Multifunctional metallophosphors with anti-triplet-triplet annihilation properties for solution-processable electroluminescent devices".JOURNAL OF MATERIALS CHEMISTRY 18.15(2008):1799-1809.
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