The electroluminescence of organic materials

Mitschke, Ullrich; Bäuerle, Peter

doi:10.1039/a908713c

Cited by 1,720 publications

(964 citation statements)

References 512 publications

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“…Earlier studies have shown that the EDG/EWG has pronounced effect on the dipole moment of the substituted complex [58]. Here also it has been observed that the EDG/EWG affects the dipole moment of the studied derivatives (1)(2)(3)(4)(5)(6)(7)(8). By substitution EDG at position 8 and EWG at position 2 (Type I) leads to µ > 6 and by reverting the substitution i.e., EDG at position 2 and EWG at position 8 (Type II) leads to µ < 3.…”

Section: Ground State Geometriesmentioning

confidence: 52%

“…The ground state (S 0 ) geometries of all the disubstituted mer-AlND3-derivatives (1)(2)(3)(4)(5)(6)(7)(8) in which the EDG and EWGs groups are substituted at positions 8 and 2 respectively on ligands and vice versa (Fig 1). The geometry of these derivatives is constructed by using the reported x-ray coordinates of the parent mer-AlND3 [52], which possesses C 1 -symmetry.…”

Section: Computational Detailsmentioning

confidence: 99%

“…The model disubstituted derivatives (1)(2)(3)(4)(5)(6)(7)(8) used in this study are obtained by systematic substitution of EDG (-CH 3 /NH 2 ) and EWG (-CN/Cl) at 8 and 2-positions respectively on each ligands of mer-AlND3 as shown in Fig.1, considering the reported parent mer-AlND3 crystal geometry [52]. The ligands are labeled with A-C designating the three naphthyridinato ligands substituted with different aryl EWG/EDGs in the 8 and 2-positions as shown in Fig.1.…”

Section: Ground State Geometriesmentioning

confidence: 99%

“…The calculated geometrical parameters of (1)(2)(3)(4)(5)(6)(7)(8) are shown in Table 1, along with the optimized parameters of merAlND3 and the experimental [52] parameters for the same are given for comparison. Variation in the calculated bond lengths and bond angles have been observed for all the disubstituted derivatives, when compared to calculated geometrical parameters of parent molecule (mer-AlND3).…”

Section: Ground State Geometriesmentioning

confidence: 99%

“…Organic light-emitting diodes (OLED) are currently gaining importance as a promising technology for the fabrication of flat-panel display devices [1][2][3][4][5][6][7]. OLEDs are heterojunction devices in which layers of organic transport materials are usually incorporated into devices as amorphous thin solid films [8].…”

Section: Introductionmentioning

confidence: 99%

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Push-pull effect on the geometrical, optical and charge transfer properties of disubstituted derivatives of mer-tris(4-hydroxy-1,5-naphthyridinato) aluminum (mer-AlND3)

Rao

Bhanuprakash

2016

Open Chemistry

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Push-pull effect on the geometrical, optical and charge transfer properties of disubstituted derivatives of mer-tris(4-hydroxy-1,5-naphthyridinato) aluminum (mer-AlND3) DOI: 10.1515/chem-2016-0001 received April 23, 2015 accepted November 14, 2015. Abstract: To design innovative and novel optical materials with high mobility, two kinds of disubstituted derivatives for mer-tris(4-hydroxy-1,5-naphthyridinato) aluminum (mer-AlND3) with push (EDG)-pull (EWG) substituents have been designed. The structures of mer-tris(8-EDG-2-EWG-4-hydroxy-1,5-naphthyridinato) aluminum (type I) and mer-tris(8-EWG-2-EDG-4-hydroxy-1,5-naphthyridinato) aluminum (type II) in the ground and first excited states have been optimized at the B3LYP/6-31G(D) and CIS/6-31G(D) level of theory, respectively. It can be seen from frontier molecular orbitals analysis, in all these complexes, the highest occupied molecular orbital (HOMO) is localized on the pyridine-4-ol ring of A-ligand while lowest unoccupied molecular orbital (LUMO) is on the pyridyl ring of B-ligand in ground state irrespective of electron donor/acceptor substitution present on the ligands similar to that of mer-tris(8-hydroxyquinoline) aluminum (mer-Alq3) and parent mer-AlND3.The absorption and emission wavelengths have been evaluated at the TD-PBE0/6-31G(D) level and it can be see that all the type I derivatives show blue shift while most of the type II derivatives show red shift compared to mer-AlND3. All the disubstituted complexes have showed hypsochromic shifts in both the absorption and emission spectra when compared with the calculated absorption and emission spectra respectively of mer-Alq3. It can be seen that the reorganization energies of some of the disubstituted derivatives are comparable with merAlq3 and these derivatives might be good candidates for emitting materials in OLED.

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Section: Ground State Geometriesmentioning

confidence: 52%

Section: Computational Detailsmentioning

confidence: 99%

Section: Ground State Geometriesmentioning

confidence: 99%

Section: Ground State Geometriesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Push-pull effect on the geometrical, optical and charge transfer properties of disubstituted derivatives of mer-tris(4-hydroxy-1,5-naphthyridinato) aluminum (mer-AlND3)

Rao

Bhanuprakash

2016

Open Chemistry

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Light‐Emitting Diodes

Greiner

Weder

2001

Encyclopedia of Polymer Science and Technology

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During the 1990s, light‐emitting diodes (LEDs) have been developed, in which the semiconducting, electroluminescent (EL) material is a polymer. These devices, usually referred to as polymer LEDs, or PLEDs, have attracted significant attention in academic and industrial environment, as reflected by the already more than 5000 scientific publications and numerous patents that address this subject. This article presents an overview of fundamental concepts, with focus on the application of PLEDs. Device physics and general device design, as well as materials concepts, have been addressed. Furthermore, the development of EL polymer systems is discussed based on important key design considerations. Finally, the perspectives for the technological exploitation of PLEDs are elucidated.

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Polymer Light‐Emitting Diodes

Weder

Kostka

2010

Encyclopedia of Polymer Science and Technology

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Electroluminescent devices based on polymeric materials have been a primary subject of research interest because of their potential for display and solid‐state lighting applications. These types of devices, termed polymer light‐emitting diodes, or PLEDs, offer the efficiency and lifetime benefits associated with solid‐state semiconductor technology, in addition to cost effective solution processing. Due to these inherent advantages, the field has grown rapidly over the past two decades, beyond the point of commercial exploitation. This article summarizes the exciting progress of the technology, addressing a broad range of topics including operating principles, device architecture, materials selection, and application requirements.

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The electroluminescence of organic materials

Cited by 1,720 publications

References 512 publications

Push-pull effect on the geometrical, optical and charge transfer properties of disubstituted derivatives of mer-tris(4-hydroxy-1,5-naphthyridinato) aluminum (mer-AlND3)

Push-pull effect on the geometrical, optical and charge transfer properties of disubstituted derivatives of mer-tris(4-hydroxy-1,5-naphthyridinato) aluminum (mer-AlND3)

Light‐Emitting Diodes

Polymer Light‐Emitting Diodes

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