Dinuclear cyclometalated iridium (III) complex containing functionalized triphenylamine core: synthesis, photophysics and application in the single-emissive-layer WOLEDs. Issue 45 (10th November 2016)

• Record Type: Journal Article
• Authors: He, Keqi; Su, Ning; Junting, Yu; Liu, Yu; Xiong, Wenjing; Hao, Zhaoran; Ma, Dongge; Zhu, Weiguo
• Is Part Of: Tetrahedron. Volume 72:Issue 45(2016)
• Page Start: 7164
• Page End: 7169
• Publication Date: 2016-11-10
• Subjects: White-light-emitting -- Dinuclear iridium (III) complex -- Triphenylamine -- WOLEDs -- Electroluminescence -- Synthesis; Chemistry, Organic -- Periodicals; 547.005
• DOI: 10.1016/j.tet.2016.09.012
• Languages: English
• ISSNs: 0040-4020

Abstract

Abstract: To obtain highly efficient white-emitting devices, a novel functionalized dinuclear iridium (III) complex of C8 TPA(FIrpic)2 was successfully synthesized and characterized. In this phosphor, FIrpic is a blue-emitting phosphorescent chromophore of iridium(III) bis[(4, 6-difluorophenyl)pyridinato-N, C2′] picolate and C8 TPA is a blue-emitting fluorescent chromophore of triphenylamine as bridging donor. Its optophysical and electro-phosphorescent properties were primarily investigated. White emission with an increasing current efficiency of 1.31 cd/A at 15.3 mA/cm 2 and brightness of 1770 cd/m 2 at 656.3 mA/cm 2 was obtained in its single-emissive-layer OLEDs with a configuration of ITO/PEDOT:PSS/C8 TPA(FIrpic)2 (10 wt %):TCTA/TPBi/LiF/Al. The results indicate that an introduction of triphenylamine group into dinuclear iridium (III) complexes as bridged donor can improve the performance of its iridium (III) complexes-doped OLEDs. Graphical abstract: A novel triphenylamine-functionalized dinuclear iridium (III) complex of C8 TPA(FIrpic)2 was synthesized and characterized. White emission with a rising brightness of 1770 cd/m 2 and current efficiency of 1.31 cd/A was obtained in the single-emissive-layer OLEDs with a configuration of ITO/PEDOT:PSS/C8 TPA(FIrpic)2 (10 wt %):TCTA/TPBi/LiF/Al using C8 TPA(FIrpic)2 as a single-component emitter.