Is a High Photoluminescence Quantum Yield Good Enough for OLEDs? Can Luminescence Rigidochromism Be Manifest in the Solid State? an Optoelectronic Device Screening Case Study for Diphosphine/Pyrazolate Copper(I) Complexes

Omary, Mohammad A.; Determan, John J.; Gamage, Chammi S. Palehepitiya; Sinha, Pankaj; Li, Shan; Patterson, Monika R.; Nestero, Vladimir N.; Wilson, Angela K.; Dias, H. V. Rasika

doi:10.1080/02603594.2019.1701448

Cited by 6 publications

(12 citation statements)

References 76 publications

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“…Solid-state emission maxima of 1 – 3 are blue-shifted in comparison to those of solution-phase samples (Table ). This blue shift is an occurrence of rigidochromism, − which results from the emission from nonrelaxed excited states in rigid environments, whereas fluid surroundings enable emission from vibrationally relaxed states. Complex 4 behaves in the opposite manner; its emission maximum is red-shifted at 77 K and in powder samples at 298 K in comparison to that in solution at ambient temperature.…”

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confidence: 99%

(Isonitrile)platinum(II) Complexes of an Amido Bis(N-heterocyclic carbene) Pincer Ligand

Liska

Swetz

et al. 2020

Organometallics

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Five Pt(II) complexes bearing a 3,6-di-tert-butyl-1,8-bis(1H-imidazol-1-yl)-9H-carbazole (BIMCA) backbone and different isonitrile ancillary ligands were synthesized and photophysically characterized. The solid-state structures were determined by X-ray crystallography, all of which showed a distorted-square-planar geometry where isonitrile moieties protrude from the Pt−carbazole plane. In the solid state, these complexes show biexponential phosphorescence with lifetimes up to 25 ms and quantum yields ranging from 5% to 22%. In solution, these complexes are weakly emissive with a nanosecond-scale lifetime. Density functional theory calculations indicate that the highest occupied Kohn−Sham orbital (HOMO) and the lowest unoccupied Kohn−Sham orbital (LUMO) reside primarily on the Me BIMCA ligand.

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confidence: 99%

(Isonitrile)platinum(II) Complexes of an Amido Bis(N-heterocyclic carbene) Pincer Ligand

Liska

Swetz

et al. 2020

Organometallics

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“…The solvent-free form of the dinuclear complex, which emitted at 477 nm with a PLQY of 0.60, also showed a similar red shift in neat and doped thin films. In particular, the addition of 1,3-bis(carbazol-9-yl)benzene (mCP), a common host material used in OLED fabrication, was observed to cause broadening and further red shifting of the emission (Figure b) . This could be explained by the reduction in medium rigidity of the material.…”

Section: Oleds Based On Other Luminescent Copper(i) Self-assembled Ma...mentioning

confidence: 99%

“…In the pure crystalline form of the copper(I) complex, the excited-state distortions could be quenched by the steric effects in the three-dimensional lattice. However, upon the addition of mCP, the material composition would be diluted and lattice constraints would be reduced, giving rise to increased distortions in the excited state and an overall red shift in the emission . To fully use the copper(I) complexes for OLEDs, the rigidity issue should be addressed and alternative host materials would be necessary.…”

Section: Oleds Based On Other Luminescent Copper(i) Self-assembled Ma...mentioning

confidence: 99%

“…To fully use the copper(I) complexes for OLEDs, the rigidity issue should be addressed and alternative host materials would be necessary. Instead of OLEDs, the neat solid powders of compound 23 were shown to be a favorable material for the fabrication of inorganic LEDs …”

Section: Oleds Based On Other Luminescent Copper(i) Self-assembled Ma...mentioning

confidence: 99%

“…(b) Emission spectra (left) of compound 23 (denoted as 1 in the figure) powder, 23 ·3THF powder, a 140 nm thick neat film of compound 23 on a quartz slide, and a 140 nm thick thin film with 60% compound 23 doped with 40% mCP and their corresponding CIE coordinates (right). This figure was reprinted with permission from ref . Copyright 2019 Taylor & Francis Group, LLC.…”

Section: Oleds Based On Other Luminescent Copper(i) Self-assembled Ma...mentioning

confidence: 99%

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Organic Light-Emitting Diodes Based on Luminescent Self-Assembled Materials of Copper(I)

2021

Energy Fuels

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Over the past decade, we have seen the rapid advancement in the technology of organic light-emitting diodes (OLEDs) toward practical applications. The high color contrast, wide viewing angles, good flexibility, and low power consumption of OLEDs have rendered them promising candidates for next-generation displays and solid-state lighting applications. Parallel to the optimization in device structures, of equal importance is the search for new classes of emitters. While conventional OLEDs mainly rely on triplet emitters based on precious metal complexes, such as those of platinum(II) and iridium(III), copper(I) self-assembled materials represent attractive alternatives with relatively low cost but comparable emission tunability. In this mini review, the recent progress in the development of copper(I) self-assembled materials, including copper(I) clusters and coordination polymers, as electroluminescent materials in OLEDs will be discussed.

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Temperature-induced solvent assisted single-crystal-to-single-crystal transformation of Mg(II)-Ln(III) heterometallic coordination polymers

Chen

Zhao

Gao

et al. 2020

Journal of Solid State Chemistry

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Is a High Photoluminescence Quantum Yield Good Enough for OLEDs? Can Luminescence Rigidochromism Be Manifest in the Solid State? an Optoelectronic Device Screening Case Study for Diphosphine/Pyrazolate Copper(I) Complexes

Cited by 6 publications

References 76 publications

(Isonitrile)platinum(II) Complexes of an Amido Bis(N-heterocyclic carbene) Pincer Ligand

(Isonitrile)platinum(II) Complexes of an Amido Bis(N-heterocyclic carbene) Pincer Ligand

Organic Light-Emitting Diodes Based on Luminescent Self-Assembled Materials of Copper(I)

Temperature-induced solvent assisted single-crystal-to-single-crystal transformation of Mg(II)-Ln(III) heterometallic coordination polymers

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