Highly Robust CuI‐TADF Emitters for Vacuum‐Deposited OLEDs with Luminance up to 222 200 cd m−2 and Device Lifetimes (LT90) up to 1300 hours at an Initial Luminance of 1000 cd m−2

Tang, Rui; Xu, Shuo; Lam, Tsz‐Lung; Cheng, Gang; Du, Lili; Wan, Qingyun; Yang, Jun; Hung, Faan‐Fung; Low, Kam‐Hung; Phillips, David Lee; Che, Chi‐Ming

doi:10.1002/anie.202203982

Cited by 44 publications

(24 citation statements)

References 35 publications

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“…Two-coordinate coinage metal complexes with a carbene-metal-amide (cMa) structure have recently been studied for applications in organic LEDs but have not been investigated for photoredox catalysis . These two-coordinated compounds have several attributes that are advantageous to their application as photosensitizers.…”

Section: Introductionmentioning

confidence: 99%

Two-Coordinate Coinage Metal Complexes as Solar Photosensitizers

et al. 2023

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Generating sustainable fuel from sunlight plays an important role in meeting the energy demands of the modern age. Herein, we report two-coordinate carbene-metal-amide (cMa, M = Cu(I) and Au(I)) complexes that can be used as sensitizers to promote the light-driven reduction of water to hydrogen. The cMa complexes studied here absorb visible photons (εvis > 103 M–1 cm–1), maintain long excited-state lifetimes (τ ∼ 0.2–1 μs), and perform stable photoinduced charge transfer to a target substrate with high photoreducing potential (E +/* up to −2.33 V vs Fc+/0 based on a Rehm–Weller analysis). We pair these coinage metal complexes with a cobalt–glyoxime electrocatalyst to photocatalytically generate hydrogen and compare the performance of the copper- and gold-based cMa complexes. We also find that the two-coordinate complexes herein can perform photodriven hydrogen production from water without the addition of the cobalt–glyoxime electrocatalyst. In this “catalyst-free” system, the cMa sensitizer partially decomposes to give metal nanoparticles that catalyze water reduction. This work identifies two-coordinate coinage metal complexes as promising abundant metal, solar fuel photosensitizers that offer exceptional tunability and photoredox properties.

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Section: Introductionmentioning

confidence: 99%

Two-Coordinate Coinage Metal Complexes as Solar Photosensitizers

et al. 2023

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“…Two complexes bearing respectively NN - or NO -chelating ligand demonstrated near-IR emission centered around 740−760 nm, a valuable property allowed by going from linear to trigonal coordination geometry and by the large reorganization happening at the excited state for these complexes . Five two-coordinate carbene-copper-amide complexes based on a carbene related to C 10 and carbazole ligands were synthesized and applied to OLED devices . The complexes were studied by both experimental techniques and DFT and TD-DFT calculations and displayed good emission quantum yields, as well as a radiative rate constant due to the TADF emission mechanism.…”

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confidence: 99%

Photoactive Copper Complexes: Properties and Applications

et al. 2022

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Photocatalyzed and photosensitized chemical processes have seen growing interest recently and have become among the most active areas of chemical research, notably due to their applications in fields such as medicine, chemical synthesis, material science or environmental chemistry. Among all homogeneous catalytic systems reported to date, photoactive copper(I) complexes have been shown to be especially attractive, not only as alternative to noble metal complexes, and have been extensively studied and utilized recently. They are at the core of this review article which is divided into two main sections. The first one focuses on an exhaustive and comprehensive overview of the structural, photophysical and electrochemical properties of mononuclear copper(I) complexes, typical examples highlighting the most critical structural parameters and their impact on the properties being presented to enlighten future design of photoactive copper(I) complexes. The second section is devoted to their main areas of application (photoredox catalysis of organic reactions and polymerization, hydrogen production, photoreduction of carbon dioxide and dye-sensitized solar cells), illustrating their progression from early systems to the current state-of-the-art and showcasing how some limitations of photoactive copper(I) complexes can be overcome with their high versatility.

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“…It has been shown that coplanar ligand orientation is important for achieving appreciable oscillator strength of the S0 → S1 transition. 22,23,33 Systems with orthogonal ligands have notably low oscillator strength because the ᴨ systems of the ligand become spatially orthogonal. Au BCz MAC crystallized with a disorder of the C=O and the two methyl groups as shown in Figure 2.…”

Section: Resultsmentioning

confidence: 99%

“…LEDs, but have never been directly investigated for solar photoredox. [17][18][19][20][21][22][23][24][25][26][27] It is valid to question whether or not two-coordinate complexes would work at all. These molecules are coordinatively unsaturated, which could allow for deleterious non-radiative decay of the excited state via solvent coordination.…”

Section: Two-coordinate Cu(i) Complexes Have Recently Been Investigat...mentioning

confidence: 99%

Two-Coordinate Coinage Metal Complexes as Solar Photosensitizers

Muniz

Archer

Applebaum

et al. 2023

Preprint

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Generating sustainable fuel from sunlight plays an important role in meeting the energy demands of the modern age. Here we report the synthesis of new two-coordinate, molecular Cu(I) and Au(I) complexes that were designed to absorb visible photons (vis > 103 M-1cm-1), maintain long excited state lifetimes (~1-0.1s), and perform stable photo-induced charge transfer to a target substrate with remarkably potent photoreducing capabilities (E+/* up to 2.33 V vs. Fc+/0). The photoredox performance was evaluated in a variety of solvents, and we were able to understand the influence of ligand design and metal center on the photophysical properties. Interestingly, we found that the Cu(I) systems have competitive figures of merit with widely used scarce metal photosensitizers such as Ru(bpy)32+ and Ir(ppy)3. This work illuminates two-coordinate coinage metal complexes as promising, abundant metal, solar fuels photosensitizers that offer exceptional tunability and photoredox properties.

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Highly Robust Cu^I‐TADF Emitters for Vacuum‐Deposited OLEDs with Luminance up to 222 200 cd m⁻² and Device Lifetimes (LT₉₀) up to 1300 hours at an Initial Luminance of 1000 cd m⁻²

Cited by 44 publications

References 35 publications

Two-Coordinate Coinage Metal Complexes as Solar Photosensitizers

Two-Coordinate Coinage Metal Complexes as Solar Photosensitizers

Photoactive Copper Complexes: Properties and Applications

Two-Coordinate Coinage Metal Complexes as Solar Photosensitizers

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