Investigation of the energy transfer mechanism in OLEDs based on a new terbium β-diketonate complex

Pereira, Alessandra; Gallardo, Hugo; Conte, Gilmar; Quirino, Welber G.; Legnani, Cristiano; Cremona, M.; Bechtold, Ivan H.

doi:10.1016/j.orgel.2011.10.007

Cited by 35 publications

(7 citation statements)

References 30 publications

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“…To evaluate the accuracy of the used ab initio technique the lowest singlet and triplet excited levels of some Gd 3+ complexes with corresponding ligands were calculated (Table ). Experimental values of triplet levels of the ligands were taken from the literary data from phosphorescence spectra of Gd 3+ complexes (Table and Table ). ,,− …”

Section: Resultsmentioning

confidence: 99%

Ab Initio Study of Energy Transfer Pathways in Dinuclear Lanthanide Complex of Europium(III) and Terbium(III) Ions

et al. 2014

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An ab initio XMCQDPT2/CASSCF study of energy transfer processes in the dinuclear lanthanide complex [(Acac)3Eu(μ-Bpym)Tb(Acac)3] (Acac is acetylacetonate, and Bpym is 2,2'-bipyrimidine) and a corresponding computational procedure are presented. Because ligands in lanthanide complexes weakly interact with each other, the large dinuclear complex bearing seven organic ligands is divided into fragments that reproduce the electrostatic effects of the ions on the electronic and geometrical structure of the ligands. The multireference XMCQDPT2/CASSCF approach is directly applied to these relatively small fragments with reasonable computational cost. The calculated energies of the singlet and triplet excited states agree well with the experiment. Based on the calculated energies, the energy level diagrams of the complex are constructed and intramolecular energy transfer channels are determined.

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Section: Resultsmentioning

confidence: 99%

Ab Initio Study of Energy Transfer Pathways in Dinuclear Lanthanide Complex of Europium(III) and Terbium(III) Ions

et al. 2014

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“…In 2011–2012, Gallardo and Pereira et al fabricated OLEDs based on Tb‐5 (Scheme ) separately . A double‐layer nondoped device emitted broadband from N,N ′‐diphenyl‐ N , N ′‐bis(1‐naphthyl)‐1,1′‐diphenyl‐4,4′‐diamine (NPB) and phosphorescence of the ligand rather than Tb 3+ .…”

Section: Visible Light Emission Lanthanide Complexesmentioning

confidence: 99%

Review on the Electroluminescence Study of Lanthanide Complexes

Wang

Zhao

Chen

et al. 2019

Advanced Optical Materials

126

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“…Different classes of anionic and neutral ligands have been studied so far, among which β-diketonates − and acylpyrazolates − excel because of their high volatility, aromatic carboxylates stand out because of high thermal and optical stability, and complexes with macrocyclic ligands are well-recognized for their excellent stability against dissociation. Lanthanide complexes with Schiff bases are also in the scope of interest, − as their high stability and infinite design possibility allow obtaining brightly luminescent materials based on them for various applications.…”

Section: Introductionmentioning

confidence: 99%

Lanthanide Complexes with 2-(Tosylamino)-benzylidene-N-(aryloyl)hydrazones: Universal Luminescent Materials

et al. 2019

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Lanthanide complexes Ln(L 1 )(HL 1 ) (Ln = Lu, Yb, Er, Gd, Eu, Sm) and Ln(L 2 )(HL 2 ) (Ln = Lu, Yb, Gd, Eu) with 2-(tosylamino)-benzylidene-N-(aryloyl)hydrazones (H 2 L 1 , aryloyl = 2-hydroxybenzoyl; H 2 L 2 , aryloyl = isonicotinoyl) were obtained with the aim to explore them as new luminescent materials. They were found to form monomeric species independently on the aryloyl group, and their crystal structures were determined from single-crystal Xray data (Yb(L 2 )(HL 2 )•0.5(C 2 H 5 OH)), as well as from powder X-ray data by Rietveld refinement (Eu(L 1 )(HL 1 )). Ytterbium complexes exhibited intense luminescence, which allowed using them in host-free organic light-emitting diodes, which demonstrated remarkable efficiency of near infrared electroluminescence (50 μW/W) at low voltage (5 V). The special mechanism of europium luminescence quenching allowed using europium complexes as luminescent thermometers, which demonstrated very high sensitivity up to 12%/K. The theory of luminescence thermometry based on a three-level system was proposed, which allowed predicting sensitivity with high accuracy (error within 20%).

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Investigation of the energy transfer mechanism in OLEDs based on a new terbium β-diketonate complex

Cited by 35 publications

References 30 publications

Ab Initio Study of Energy Transfer Pathways in Dinuclear Lanthanide Complex of Europium(III) and Terbium(III) Ions

Ab Initio Study of Energy Transfer Pathways in Dinuclear Lanthanide Complex of Europium(III) and Terbium(III) Ions

Review on the Electroluminescence Study of Lanthanide Complexes

Lanthanide Complexes with 2-(Tosylamino)-benzylidene-N-(aryloyl)hydrazones: Universal Luminescent Materials

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