High-efficiency spin-coated organic light-emitting diodes based on a europium complex

Fang, Junfeng; Choy, Chum Chan; Ma, Dongge; Ou, Eric C.-W.

doi:10.1016/j.tsf.2006.05.031

Cited by 20 publications

(13 citation statements)

References 38 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Similar EL spectra are observed for these doped devices, which are different from the PL profiles of the Eu(DBM) 3 (BrDPPz)-doped PFO-PBD films. An EL emission maximum at 612 nm with a FWHM of 14 nm and three weak peaks at 574, 648 and 702 nm are observed in these EL profiles [14,15]. The weak emission peaks at 400 to 550 nm also appear in the EL spectra, and obviously decrease in intensity with increasing dopant concentration.…”

Section: El Propertiesmentioning

confidence: 82%

“…No emission from the BrDPPz ligand was observed. This indicates that complete energy transfer from BrDPPz to the Eu 3+ ion occurs in this europium(ІІІ) complex, and modifying the DPPz ligand with a heavy atom (bromine) has no effect on the PL spectrum of its europium(III) complex [14,15]. The absorption spectrum of Eu(DBM) 3 (BrDPPz) (Figure 2) overlaps well with the PL spectrum of the PFO-PBD host.…”

Section: Thermal Stabilitymentioning

confidence: 83%

“…The absorption spectrum of Eu(DBM) 3 (BrDPPz) (Figure 2) overlaps well with the PL spectrum of the PFO-PBD host. As a result, efficient energy transfer from the PFO-PBD to Eu(DBM) 3 (BrDPPz) can be expected to occur via Förster energy transfer [15]. Ф PL of Eu(DBM) 3 (BrDPPz) in CH 2 Cl 2 was measured using EuCl 3 ·6H 2 O (Ф f =0.73% in water) as a reference [36].…”

Section: Thermal Stabilitymentioning

confidence: 99%

“…Compared to the high efficiency of red-emitting iridium(III) and platinum(II) complexes [3][4][5][6][7], europium(ІІІ) complexes exhibit considerable advantages because of their extremely narrow emission spectral bandwidth. Recently, spin-casting techniques have been used to fabricate europium(III) complex-doped polymer light-emitting diodes (PLEDs) containing conjugated polymers as the host matrix [8][9][10][11][12][13][14][15][16][17][18][19][20]. PLEDs formed by this method can be simply fabricated by solution processing, and luminescence quenching by concentration effects is prevented.…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

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

et al. 2015

View full text Add to dashboard Cite

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

show abstract

Section: El Propertiesmentioning

confidence: 82%

Section: Thermal Stabilitymentioning

confidence: 83%

Section: Thermal Stabilitymentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

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

et al. 2015

View full text Add to dashboard Cite

show abstract

“…The strong red fluorescence is required to achieve a natural tone LED devices. Lanthanide(III) ions have been extensively studied as the attractive luminescent center for display devices [1][2][3][4]. The monochromatic emission of lanthanide(III) ion mainly comes from the f-f transition with no Storks shift [2].…”

Section: Introductionmentioning

confidence: 99%

Emission properties of Sm(III) complexes having remarkably deep-red emission band

Kawai

Zhao

Tsuruoka³

et al. 2009

Journal of Alloys and Compounds

View full text Add to dashboard Cite

a b s t r a c tNovel Sm(III) complexes were synthesized by the reaction of hexafluoroacetylacetonato (hfa) and triphenylphosphine oxide (TPPO), 2,2 -bipyridine (bpy), 1,10-phenanthroline (phen). Emission bands were observed at "deep-red" region and were attributed to f-f transitions. The branching ratio (electric-dipole transitions 644 nm vs. magnetic dipole transition 598 nm) of the Sm(hfa) 3 (TPPO) 2 was much larger than that of Sm(hfa) 3 (bpy) 2 , Sm(hfa) 3 (phen) 2 . Those emission properties are due to coordination number and asymmetrical structures of novel Sm(III) complexes.

show abstract

Nearly monochromatic red electroluminescence from a nonconjugated polymer containing carbazole segments and phenanthroline [Eu(β‐diketonate)₃] moieties

Zhang

Yuan

Tang

et al. 2008

J. Polym. Sci. A Polym. Chem.

View full text Add to dashboard Cite

A novel nonconjugated copolymer (PVKEu) with carbazole segments and phenanthroline [Eu(β‐diketonate)3] moieties was synthesized via free radical copolymerization, and characterized by FTIR, 1H NMR spectroscopy, GPC, ICP, and elemental analysis. The copolymer exhibited good solubility, as well as good thermal stability and high glass transition temperature. The photoluminescence (PL) of this polymer in solution and in solid film has been studied. A multi‐layer device with the configuration of ITO/PEDOT: PSS (40 nm)/PVKEu (70 nm)/BCP (15 nm)/AlQ3 (30 nm)/LiF/Al exhibited nearly monochromatic red emission at 615 nm and voltage‐independent spectral stability. Our results suggest that enhancing the ligand‐mediated energy transfer between the matrix polymer and europium complex is a potential method to improve the electroluminescence performance of the Eu‐chelated polymers. © 2008 Wiley Periodicals, Inc. J Polym Sci Part A: Polym Chem 47: 210–221, 2009

show abstract

High-efficiency spin-coated organic light-emitting diodes based on a europium complex

Cited by 20 publications

References 38 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

Emission properties of Sm(III) complexes having remarkably deep-red emission band

Nearly monochromatic red electroluminescence from a nonconjugated polymer containing carbazole segments and phenanthroline [Eu(β‐diketonate)₃] moieties

Contact Info

Product

Resources

About

High-efficiency spin-coated organic light-emitting diodes based on a europium complex

Cited by 20 publications

References 38 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

Emission properties of Sm(III) complexes having remarkably deep-red emission band

Nearly monochromatic red electroluminescence from a nonconjugated polymer containing carbazole segments and phenanthroline [Eu(β‐diketonate)3] moieties

Contact Info

Product

Resources

About

Nearly monochromatic red electroluminescence from a nonconjugated polymer containing carbazole segments and phenanthroline [Eu(β‐diketonate)₃] moieties