Highly Emissive Red Heterobimetallic IrIII/MI (MI = CuI and AuI) Complexes for Efficient Light-Emitting Electrochemical Cells

Bonfiglio, Anna; Hsiao, Pei-Wan; Yin, Chen; Gourlaouen, Christophe; Marchand, Quentin; César, Vincent; Bellemin‐Laponnaz, Stéphane; Wang, Yunxin; Lu, Chin‐Wei; Daniel, Chantal; Polo, Federico; Su, Hai‐Ching; Mauro, Matteo

doi:10.1021/acs.chemmater.1c03972

Cited by 19 publications

(15 citation statements)

References 85 publications

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“…6 %). [162] With proper ligand modifications, multinuclear iTMCs are also good candidates for use in efficient long-wavelength LECs.…”

Section: Discussionmentioning

confidence: 99%

Long‐Wavelength Light‐Emitting Electrochemical Cells: Materials and Device Engineering

Lin

2022

Chemistry A European J

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Long‐wavelength light‐emitting electrochemical cells (LECs) are potential deep‐red and near infrared light sources with solution‐processable simple device architecture, low‐voltage operation, and compatibility with inert metal electrodes. Many scientific efforts have been made to material design and device engineering of the long‐wavelength LECs over the past two decades. The materials designed the for long‐wavelength LECs cover ionic transition metal complexes, small molecules, conjugated polymers, and perovskites. On the other hand, device engineering techniques, including spectral modification by adjusting microcavity effect, light outcoupling enhancement, energy down‐conversion from color conversion layers, and adjusting intermolecular interactions, are also helpful in improving the device performance of long‐wavelength LECs. In this review, recent advances in the long‐wavelength LECs are reviewed from the viewpoints of materials and device engineering. Finally, discussions on conclusion and outlook indicate possible directions for future developments of the long‐wavelength LECs. This review would like to pave the way for the researchers to design materials and device engineering techniques for the long‐wavelength LECs in the applications of displays, bio‐imaging, telecommunication, and night‐vision displays.

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“…6 %). [162] With proper ligand modifications, multinuclear iTMCs are also good candidates for use in efficient long-wavelength LECs.…”

Section: Discussionmentioning

confidence: 99%

Long‐Wavelength Light‐Emitting Electrochemical Cells: Materials and Device Engineering

Lin

2022

Chemistry A European J

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“…1b), indicating that the emission of both solution and neat lm arises from the 3 CT state. 30,35 PL emission spectra of the solutions in comparison with the neat lms of Ir1, Ir2 and Ir3 + are red-shifted by 4, 4 and 11 nm, respectively, that indicates the lower intermolecular interactions of PI-based complexes (Ir1, Ir2) compare to parent complex [Ir(ppy) 2 (phen)] + . Nevertheless, Ir3 + is the most affected complex that 11 nm red-shift was observed probably due to increasing the intermolecular interaction in its neat lm.…”

Section: Photophysical Characterizationsmentioning

confidence: 94%

Phenanthroimidazole as Molecularly Engineered Switch for Efficient and Highly Long-lived Light-Emitting Electrochemical Cell.

Bideh

Sousaraei

Arani

2022

Preprint

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Although, light-emitting electrochemical cells (LECs) based on Ir(III) complexes owing to the superior advantages exhibit high potential for display and lighting applications, they still suffer from relatively low stability and sluggish response time. To mitigate this challenge, herein, a series of Ir(III) complexes based on phenanthroimidazole (PI) as ancillary ligand were functionalized to achieve efficient, highly stable yellow to orange LEC devices with fast response. These complexes exhibit appropriate electrochemical stability and significant suppression of concentration quenching in the thin films compare to archetype complex. Concerning, the fabricated LECs showed remarkable long device lifetime over 1400 and 2100 hours and EQE of 2 and 3% for yellow and orange-LECs, respectively, in which obtained t1/2 for yellow LEC is among the highest value for cationic iridium (III) complexes based yellow-LECs reported so far. Subsequently, incorporation of ionic tethered functional group on PI, improved the mobility of emissive layer, reducing the device turn-on time around 75–88%. This study represents facile functionalization and characterization of PI ligand and its potential application in optoelectronic devices (OLED).

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“…Early reports on iTMCs-based LECs usually employ mononuclear ionic complexes as the emitting layers. 18,[35][36][37][38][39] Compared with mononuclear iridium(III) complexes, the dinuclear counterpart exhibits improved efficiency for the recent works on LECs and organic light-emitting diodes due to the suppressed luminescence quenching in the active layers. [40][41][42][43][44] In addition, dinuclear species can present specific photophysical properties and functions by tuning the bridging ligands, which provide more design opportunities to control the solid-packing and intrinsic excited-state characteristics.…”

Section: Introductionmentioning

confidence: 99%

Dinuclearization strategy of cationic iridium(iii) complexes for efficient and stable flexible light-emitting electrochemical cells

et al. 2023

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Highly Emissive Red Heterobimetallic Ir^III/M^I (M^I = Cu^I and Au^I) Complexes for Efficient Light-Emitting Electrochemical Cells

Cited by 19 publications

References 85 publications

Long‐Wavelength Light‐Emitting Electrochemical Cells: Materials and Device Engineering

Long‐Wavelength Light‐Emitting Electrochemical Cells: Materials and Device Engineering

Phenanthroimidazole as Molecularly Engineered Switch for Efficient and Highly Long-lived Light-Emitting Electrochemical Cell.

Dinuclearization strategy of cationic iridium(iii) complexes for efficient and stable flexible light-emitting electrochemical cells

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