Enhanced electroluminescent efficiency from spin-coated europium(III) organic light-emitting device

Male, Nigel A. H.; Salata, Oleg V.; Christou, Victor

doi:10.1016/s0379-6779(01)00373-3

Cited by 64 publications

(32 citation statements)

References 12 publications

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“…2,9-dimethyl-4,7-diphenyl-1,10-phenanthroline (bathocuproine, BCP) [13,14]. In addition, energy transfer or exciplex between Phen and Alq 3 could be possible, along with the perturbation of the electronic states of Alq, which could result in a blue shifted EL spectrum.…”

Section: Electroluminescence (El) Control and Prolonged Lifetime Of Amentioning

confidence: 99%

Improved lifetime of an OLED using aluminum (III) tris (8-hydroxyquinolate)

Kim

et al. 2004

Science and Technology of Advanced Materials

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Improved lifetime with enhanced efficiency of an Alq 3 based OLED was realized by the co-evaporation of hexamethylbenzene (HMB). Two different solvated crystalline systems of Alq 3 , Alq 3 (C 7 H 8 ) 1/2 , Alq 3 (C 2 H 5 OH), were synthesized to investigate the effect of optically inactive materials on the emission properties of Alq 3 . Clathrate solvents perturb the excited electronic states of Alq 3 so that the incorporated materials in OLEDs should be chemically and optically inactive to control polymorphs. HMB acts as a carrier blocker for both electrons and holes. However, Alq 3 may be stabilized from Joule heat if the Joule heat is efficiently consumed as the vibrational/rotational energy of HMB. Consequently, the self-quenching and the crystallization of Alq 3 are effectively suppressed by the HMB, resulting in prolonged operating time and enhanced efficiency for Alq 3 -OLEDs. q

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Section: Electroluminescence (El) Control and Prolonged Lifetime Of Amentioning

confidence: 99%

Improved lifetime of an OLED using aluminum (III) tris (8-hydroxyquinolate)

Kim

et al. 2004

Science and Technology of Advanced Materials

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“…Zheng et al [183] obtained Eu(TFacac) 3 phen using 1,1,1-trifluoroacetylacetone as ligand, and Male et al [178] demonstrated Eu(TTFA) 3 phen using tris-(thiophenyltrifluoromethylacetylacetonate)(phenanthroline) as the ligand. Both emitters can be solution processed and mixed with PVK and PBD to fabricate the OLED devices.…”

Section: Red Phosphorescent Materialsmentioning

confidence: 99%

Organic Semiconductor Electroluminescent Materials

2015

Lecture Notes in Chemistry

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This chapter reviews the important progress made on small molecule electroluminescent materials used in organic light-emitting diode (OLED). In many cases we describe not only the material structures but also the properties associated with these materials, such as energy level, absorption and photoluminescence (PL) peaks, PL quantum yield, exciton life time, and so on. The performances of related devices are covered as well if they are available.

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“…For SSL, highly intense and narrow peak emission of the primary colours (RGB) is essential. However, red light emission is considered as the weakest one because the transition corresponding to red light occurs at a comparatively small energy band gap, which is hard to match the energy level of carrier transmission layer [2]. This drawback can be overcome to certain extent by employing europium complexes in view of their high photo luminescent (PL) efficiency and the red-emission ability that are widely exploited in full-color displays.…”

Section: Introductionmentioning

confidence: 99%

Structural and Optical Investigation of Novel Europium Hybrid Organic Complex for OLEDs and Solid State Lighting

Chitnis¹,

Kalyani²,

Dhoble³

2017

JMPC

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We report the design and synthesis of volatile europium β-diketonate Eu(dmh) 3 phen organic hybrid complex by precipitation technique. A series of complexes were synthesized for different pH values, ranging between 8.0 and 6.0 maintaining stoichiometric ratio. Among all the synthesized complexes, Eu(dmh) 3 phen with pH 7 exhibits red intense emission at 613 nm with a sharp spectral bandwidth of 5 nm when excited at a wavelength of 372nm,infering that the synthesized complex is pH sensitive. This complex is further assessed for structural, thermal and luminescence behavior in various solvents. X-ray diffractogram reveals its crystalline nature and FTIR confirms the complete formation of the complex revealing the presence of TTA and bipy structure in the metal complex. TGA/DTA exhibits good thermal stability, which is highly essential for fabricating organic light emitting diodes (OLEDs) for solid state lighting. Hypsochromic shift was observed in the optical absorption spectra of Eu(dmh) 3 phen, when the solvent is changed from basic to acidic media.

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Enhanced electroluminescent efficiency from spin-coated europium(III) organic light-emitting device

Cited by 64 publications

References 12 publications

Improved lifetime of an OLED using aluminum (III) tris (8-hydroxyquinolate)

Improved lifetime of an OLED using aluminum (III) tris (8-hydroxyquinolate)

Organic Semiconductor Electroluminescent Materials

Structural and Optical Investigation of Novel Europium Hybrid Organic Complex for OLEDs and Solid State Lighting

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