Highly efficient saturated red electrophosphorescence from isoquinoline-based iridium complex containing triphenylamino units in polymer light-emitting devices

Hu, Zhengyong; Luo, Chen; Wang, Lei; Huang, Fengliang; Zhu, Ke; Zhu, Min; Zhu, Weiguo; Cao, Yong

doi:10.1016/j.cplett.2007.05.014

Cited by 14 publications

(1 citation statement)

References 24 publications

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“…However, compared with Eu(DBM) 3 (DPPz) [11], Eu(DBM) 3 (BrDPPz) possesses a higher LUMO energy level by 0.05 eV [42]. This implies that Eu(DBM) 3 (BrDPPz) is poorer at trapping electrons than Eu(DBM) 3 (DPPz), which would decrease the EL efficiency of the Eu(DBM) 3 (BrDPPz)-doped PFO-PBD devices [12,43]. Therefore, to obtain the better device performance, further studies on the EL properties of Eu(DBM) 3 (BrDPPz) to optimize polymeric host and device configuration should be performed.…”

Section: Electrochemical Propertiesmentioning

confidence: 99%

Polymer light-emitting devices based on europium(III) complex with 11-bromo-dipyrido[3,2-a:2′,3′-c]phenazine

et al. 2015

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Polymer light-emitting diodes (PLEDs) containing Eu(DBM)3(BrDPPz) (DBM is dibenzoylmethane, and BrDPPz is 11-bromo-dipyrido[3,2-a:2′,3′-c]phenazine) doped in a blend of poly(9,9-dioctylfluorene) (PFO) and 2-tert-butylphenyl-5-biphenyl-1,3,4-oxadiazole (PBD) as the host matrix are reported. Eu(DBM)3(BrDPPz) exhibited high thermal stability and intense UV-Vis absorption. Narrow-bandwidth red emission at 612 nm with a full width at half-maximum (FWHM) of 14.0 nm was observed from Eu(DBM) 3 (BrDPPz) in these double-layered PLEDs at dopant concentrations from 1 wt% to 8 wt%. For the PLED containing 1 wt% Eu(DBM) 3 (BrDPPz), a maximum luminance of 829 cd/m 2 at 153.5 mA/cm 2 , highest external quantum efficiency of 1.70% at 2.1 mA/cm 2 and maximum luminance of 0.74 cd/A at 4.31 mA/cm 2 were obtained. europium(III) complexes, electroluminescence, optophysical properties, polymer light-emitting diodes

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Section: Electrochemical Propertiesmentioning

confidence: 99%

Polymer light-emitting devices based on europium(III) complex with 11-bromo-dipyrido[3,2-a:2′,3′-c]phenazine

et al. 2015

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Optoelectronic properties of new functionalized heteroleptic iridium complex

Liang

Wang

Zhang

et al. 2011

J. Cent. South Univ. Technol.

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A new functionalized heteroleptic iridium complex coordinated with 1-phenylisoquinoline (1-piq) and a functionalized β-diketone (G1), Ir(1-piq) 2 G1, was synthesized and characterized by 1 H-NMR, mass spectrometry and elemental analysis. The larger conjugation of the replacement of acetylacetone (acac) by a functionalized β-diketonate ligand led to a significant decrease in the HOMO level toward vacuum level, while Ir(1-piq) 2 G1 and Ir(1-piq) 2 (acac) showed red phosphorescent emissions of about 620 nm in dichloromethane solution. The phosphorescent polymer light-emitting devices were achieved, with the complexes incorporated with polyfluorene (PFO) as a host polymer doped with 30% of 5-(4-biphenylyl)-2-(4-tert-butylphenyl)-1,3,4-oxadiazole (PBD) as electron transport material. The energy transfer mechanism of the devices was also discussed. The lower EL performance of Ir(1-piq) 2 G1 is ascribed to the inter-ligand energy transfer, indicating that it is important to control the energy level of the cyclometalated and ancillary ligands.

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Highly-efficiency red-emitting platinum (II) complexes containing 4′-diarylamino-1-phenylisoquinoline ligands in polymer light-emitting diodes: Synthesis, structure, photoelectron and electroluminescence

Shi

Tan

et al. 2010

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Highly efficient saturated red electrophosphorescence from isoquinoline-based iridium complex containing triphenylamino units in polymer light-emitting devices

Cited by 14 publications

References 24 publications

Polymer light-emitting devices based on europium(III) complex with 11-bromo-dipyrido[3,2-a:2′,3′-c]phenazine

Polymer light-emitting devices based on europium(III) complex with 11-bromo-dipyrido[3,2-a:2′,3′-c]phenazine

Optoelectronic properties of new functionalized heteroleptic iridium complex

Highly-efficiency red-emitting platinum (II) complexes containing 4′-diarylamino-1-phenylisoquinoline ligands in polymer light-emitting diodes: Synthesis, structure, photoelectron and electroluminescence

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