Iridium Complexes Embedding Rigid D-A-Type Coordinated Cores: Facile Synthesis and High-Efficiency Near-Infrared Emission in Solution-Processed Polymer Light-Emitting Diodes

Liu, Denghui; You, Caifa; Li, Mengke; Wang, Qianqian; Zhang, Kai; Zhang, Bin; Yu, Junting; Liu, Yu; Su, Shi‐Jian; Zhu, Weiguo

doi:10.1016/j.jorganchem.2020.121615

Cited by 9 publications

(1 citation statement)

References 55 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…It is found that rigid C^N ligands bearing azaacenes indeed could suppress non-radiative processes and result in an improvement of device performance. [41][42][43][44][45] Moreover, the peripheral substituents in the C^N coordinated skeleton further play a vital role in maintaining sufficient solubility and finely tuning the optoelectronic properties. As a result, we shifted emission peaks from the deep-red (685 nm) to near-infrared region (852 nm) for iridium (III) complexes by delicate chemical structure modifications.…”

Section: Introductionmentioning

confidence: 99%

Azaacene containing iridium(iii) phosphors: elaboration of the π-conjugation effect and application in highly efficient solution-processed near-infrared OLEDs

Li,

Wang,

You

et al. 2023

Dalton Trans.

Self Cite

View full text Add to dashboard Cite

show abstract

Section: Introductionmentioning

confidence: 99%

Azaacene containing iridium(iii) phosphors: elaboration of the π-conjugation effect and application in highly efficient solution-processed near-infrared OLEDs

Li,

Wang,

You

et al. 2023

Dalton Trans.

Self Cite

View full text Add to dashboard Cite

show abstract

C₁‐Symmetric [Ir(C^N¹)(C^N²)(O^O)]‐Tris‐Heteroleptic Iridium(III)‐Complexes with the Preferentially Horizontal Orientation for High‐Performance Near‐Infrared Organic Light‐Emitting Diodes

Wang

Miao

et al. 2021

Advanced Optical Materials

View full text Add to dashboard Cite

The development of high‐efficiency near‐infrared (NIR)‐emitting Ir(III)‐complex‐based phosphors for reliable NIR‐OLEDs (near‐infrared organic light‐emitting diodes) is still a formidable challenge. Herein, a molecule‐engineered approach is developed to afford three C1‐symmetric [Ir(C^N1)(C^N2)(O^O)]‐tris‐heteroleptic Ir(III)‐complexes ([Ir(iqbt)(dFppy)(acac)] (1), [Ir(iqbt)(ppy)(acac)] (2), and [Ir(iqbt)(dpqx)(acac)] (3)), whose good NIR‐luminescent efficiency (ΦPL = 0.18 for 1 (λem = 703 nm), 0.26 for 2 (λem = 715 nm) or 0.28 for 3 (λem = 707 nm)) originates from the strengthened 3MLCT contribution (MLCT = metal‐to‐ligand charge transfer). Moreover, the quantitative molecular orientation determination of their doped emitting layers (EMLs) reveals that the preferentially horizontal orientation of the emitting dipoles is beneficial to their highly efficient NIR‐OLEDs with light out‐coupling. Especially for the NIR‐OLED ‐2 with λem = 715 nm, a high performance (ηEQEMax = 5.30% and negligible (<2%) efficiency‐roll‐off) is realized among the reported solution‐processed NIR‐OLEDs based on Ir(III)‐complexes at similar color gamut. This result shows that C1‐symmetric [Ir(C^N1)(C^N2)(O^O)]‐tris‐heteroleptic Ir(III)‐complexes can provide a new platform to low‐cost and large‐area scalable NIR‐OLEDs.

show abstract

The Molecular Design and Electroluminescent Performance of Near‐Infrared (NIR) Iridium(III) Complexes Bearing Isoquinoline‐, Phthalazine‐ and Phenazine‐Based Ligands

Zhu,

Liu,

Yang

et al. 2024

ChemPhysChem

View full text Add to dashboard Cite

Near‐infrared (NIR) light has characteristics of invisibility to human eyes, less background interference, low light scattering, and strong cell penetration. Therefore, NIR luminescent materials have significant applications in imaging, sensing, energy, information storage and display. The development of NIR luminescent materials thus has emerged as a highly dynamic area of research in the realm of contemporary materials. To date, NIR luminescent materials are roughly divided into inorganic materials and organic materials. Compared with inorganic materials, organic NIR luminescent materials have become a hot research topic in recent years due to their rich sources, easy control of structure, simple preparation process, low cost, and good film‐forming properties. Among them, iridium(III) [Ir(III)] complexes exhibit excellent properties such as thermal stability, simple synthesis, easy color modulation, short excited state lifetimes, and high brightness, thus becoming one of the ideal luminescent material systems for preparing high‐quality organic light‐emitting diodes. Therefore, how to obtain Ir(III) complexes with NIR emission and high efficiency through molecular design is a necessary and promising research topic. This work reviews the research progress of representative NIR Ir(III) complexes bearing isoquinoline‐, phenazine‐, and phthalazine‐based ligands reported in recent years and introduces the design strategies and electroluminescent performances of NIR Ir(III) complexes.

show abstract

Iridium Complexes Embedding Rigid D-A-Type Coordinated Cores: Facile Synthesis and High-Efficiency Near-Infrared Emission in Solution-Processed Polymer Light-Emitting Diodes

Cited by 9 publications

References 55 publications

Azaacene containing iridium(iii) phosphors: elaboration of the π-conjugation effect and application in highly efficient solution-processed near-infrared OLEDs

Azaacene containing iridium(iii) phosphors: elaboration of the π-conjugation effect and application in highly efficient solution-processed near-infrared OLEDs

C₁‐Symmetric [Ir(C^N¹)(C^N²)(O^O)]‐Tris‐Heteroleptic Iridium(III)‐Complexes with the Preferentially Horizontal Orientation for High‐Performance Near‐Infrared Organic Light‐Emitting Diodes

The Molecular Design and Electroluminescent Performance of Near‐Infrared (NIR) Iridium(III) Complexes Bearing Isoquinoline‐, Phthalazine‐ and Phenazine‐Based Ligands

Contact Info

Product

Resources

About

Iridium Complexes Embedding Rigid D-A-Type Coordinated Cores: Facile Synthesis and High-Efficiency Near-Infrared Emission in Solution-Processed Polymer Light-Emitting Diodes

Cited by 9 publications

References 55 publications

Azaacene containing iridium(iii) phosphors: elaboration of the π-conjugation effect and application in highly efficient solution-processed near-infrared OLEDs

Azaacene containing iridium(iii) phosphors: elaboration of the π-conjugation effect and application in highly efficient solution-processed near-infrared OLEDs

C1‐Symmetric [Ir(C^N1)(C^N2)(O^O)]‐Tris‐Heteroleptic Iridium(III)‐Complexes with the Preferentially Horizontal Orientation for High‐Performance Near‐Infrared Organic Light‐Emitting Diodes

The Molecular Design and Electroluminescent Performance of Near‐Infrared (NIR) Iridium(III) Complexes Bearing Isoquinoline‐, Phthalazine‐ and Phenazine‐Based Ligands

Contact Info

Product

Resources

About

C₁‐Symmetric [Ir(C^N¹)(C^N²)(O^O)]‐Tris‐Heteroleptic Iridium(III)‐Complexes with the Preferentially Horizontal Orientation for High‐Performance Near‐Infrared Organic Light‐Emitting Diodes