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Jayabharathi J, Thanikachalam V, Thilagavathy S. Phosphorescent organic light-emitting devices: Iridium based emitter materials – An overview. Coord Chem Rev 2023. [DOI: 10.1016/j.ccr.2023.215100] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/12/2023]
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2
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Chong YY, Mark-Lee WF, Ahmad I, Kassim MB. Crystal structure of 1-[3-(trifluoromethyl)cinnamoyl]-3-(pyridin-2-yl-κ N)pyrazole-κ 2
N-bis(2-phenylpyridinato-k 2
C, N)iridium(III) hexafluorophosphate complex, [C 40H 28F 3IrN 5O]PF 6. Z KRIST-NEW CRYST ST 2020. [DOI: 10.1515/ncrs-2020-0029] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Abstract
[C40H28F3IrN5O]PF6, monoclinic, P21/c (no. 14), a = 20.2282(19) Å, b = 14.5095(11) Å, c = 12.6091(10) Å, β = 96.937(3)°, V = 3673.7(5) Å3, Z = 4, Rgt(F) = 0.0498, wRref(F2) = 0.1250, T = 107(2) K.
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Affiliation(s)
- Yan Yi Chong
- Department of Chemical Sciences, Faculty of Science and Technology , Universiti Kebangsaan Malaysia , 43600 Bangi, Selangor , Malaysia
| | - Wun Fui Mark-Lee
- Department of Basic Science and Engineering, Faculty of Agriculture and Food Sciences , Universiti Putra Malaysia , 97008 Bintulu, Sarawak , Malaysia
| | - Ishak Ahmad
- Department of Chemical Sciences, Faculty of Science and Technology , Universiti Kebangsaan Malaysia , 43600 Bangi, Selangor , Malaysia
| | - Mohammad B. Kassim
- Department of Chemical Sciences, Faculty of Science and Technology , Universiti Kebangsaan Malaysia , 43600 Bangi, Selangor , Malaysia
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Pashaei B, Karimi S, Shahroosvand H, Abbasi P, Pilkington M, Bartolotta A, Fresta E, Fernandez-Cestau J, Costa RD, Bonaccorso F. Polypyridyl ligands as a versatile platform for solid-state light-emitting devices. Chem Soc Rev 2019; 48:5033-5139. [DOI: 10.1039/c8cs00075a] [Citation(s) in RCA: 67] [Impact Index Per Article: 13.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
A comprehensive review of tuneable polypyridine complexes as the emissive components of OLED and LEC devices is presented, with a view to bridging the gap between molecular design and commercialization.
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Affiliation(s)
- Babak Pashaei
- Group for Molecular Engineering of Advanced Functional Materials (GMA)
- Department of Chemistry
- University of Zanjan
- Zanjan
- Iran
| | - Soheila Karimi
- Group for Molecular Engineering of Advanced Functional Materials (GMA)
- Department of Chemistry
- University of Zanjan
- Zanjan
- Iran
| | - Hashem Shahroosvand
- Group for Molecular Engineering of Advanced Functional Materials (GMA)
- Department of Chemistry
- University of Zanjan
- Zanjan
- Iran
| | - Parisa Abbasi
- Department of Chemistry
- Brock University
- St. Catharines
- Canada
| | | | | | - Elisa Fresta
- IMDEA Materials Institute
- Madrid
- Spain
- Universidad Autónoma de Madrid
- Departamento de Física Aplicada
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Li TY, Wu J, Wu ZG, Zheng YX, Zuo JL, Pan Y. Rational design of phosphorescent iridium(III) complexes for emission color tunability and their applications in OLEDs. Coord Chem Rev 2018. [DOI: 10.1016/j.ccr.2018.06.014] [Citation(s) in RCA: 163] [Impact Index Per Article: 27.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Feng Z, Wang D, Yang X, Jin D, Zhong D, Liu B, Zhou G, Ma M, Wu Z. Asymmetric Heteroleptic Ir(III) Phosphorescent Complexes with Aromatic Selenide and Selenophene Groups: Synthesis and Photophysical, Electrochemical, and Electrophosphorescent Behaviors. Inorg Chem 2018; 57:11027-11043. [PMID: 30129751 DOI: 10.1021/acs.inorgchem.8b01639] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
With the aim of evaluating the potential of selenium-containing groups in developing electroluminescent (EL) materials, a series of asymmetric heteroleptic Ir(III) phosphorescent complexes (Ir-Se0F, Ir-Se1F, Ir-Se2F, and Ir-Se3F) have been synthesized by using 2-selenophenylpyridine and one ppy-type (ppy = 2-phenylpyridine) ligand with a fluorinated selenide group. To the best of our knowledge, these complexes represent unprecedented examples of asymmetric heteroleptic Ir(III) phosphorescent emitters bearing selenium-containing groups. Natural transition orbital (NTO) analysis based on optimized geometries of the first triplet state (T1) have shown that the phosphorescent emissions of these Ir(III) complexes dominantly show 3π-π* features of the 2-selenophenylpyridine ligand with slight metal to ligand charge transfer (MLCT) contribution. In comparison with their symmetric parent complex Ir-Se with two 2-selenophenylpyridine ligands, these asymmetric heteroleptic Ir(III) phosphorescent complexes can show much higher phosphorescent quantum yields (ΦP) of ca. 0.90. Both the hole- and electron-trapping ability of these Ir(III) phosphorescent complexes can be enhanced by selenophene and fluorinated selenide groups to improve their EL efficiencies. The EL abilities of these asymmetric heteroleptic Ir(III) phosphorescent emitters fall in the order Ir-Se3F > Ir-Se2F > Ir-Se1F > Ir-Se0F. The highest EL efficiencies have been achieved by Ir-Se3F in the solution-processed OLEDs with external quantum efficiency (ηext), current efficiency (ηL), and power efficiency (ηP) of 19.9%, 65.6 cd A-1, and 57.3 lm W-1, respectively. These encouraging EL results clearly indicate the great potential of selenium-containing groups in developing high-performance Ir(III) phosphorescent emitters.
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Affiliation(s)
- Zhao Feng
- MOE Key Laboratory for Nonequilibrium Synthesis and Modulation of Condensed Matter, Institute of Chemistry for New Energy Materials, Department of Chemistry, School of Science , Xi'an Jiaotong University , Xi'an 710049 , People's Republic of China
| | - Dezhi Wang
- Department of Applied Chemistry, College of Chemistry & Pharmacy , Northwest A&F University , Yangling 712100 , People's Republic of China
| | - Xiaolong Yang
- MOE Key Laboratory for Nonequilibrium Synthesis and Modulation of Condensed Matter, Institute of Chemistry for New Energy Materials, Department of Chemistry, School of Science , Xi'an Jiaotong University , Xi'an 710049 , People's Republic of China
| | - Deyuan Jin
- MOE Key Laboratory for Nonequilibrium Synthesis and Modulation of Condensed Matter, Institute of Chemistry for New Energy Materials, Department of Chemistry, School of Science , Xi'an Jiaotong University , Xi'an 710049 , People's Republic of China
| | - Daokun Zhong
- MOE Key Laboratory for Nonequilibrium Synthesis and Modulation of Condensed Matter, Institute of Chemistry for New Energy Materials, Department of Chemistry, School of Science , Xi'an Jiaotong University , Xi'an 710049 , People's Republic of China
| | - Boao Liu
- MOE Key Laboratory for Nonequilibrium Synthesis and Modulation of Condensed Matter, Institute of Chemistry for New Energy Materials, Department of Chemistry, School of Science , Xi'an Jiaotong University , Xi'an 710049 , People's Republic of China
| | - Guijiang Zhou
- MOE Key Laboratory for Nonequilibrium Synthesis and Modulation of Condensed Matter, Institute of Chemistry for New Energy Materials, Department of Chemistry, School of Science , Xi'an Jiaotong University , Xi'an 710049 , People's Republic of China
| | - Miaofeng Ma
- Department of Applied Chemistry, College of Chemistry & Pharmacy , Northwest A&F University , Yangling 712100 , People's Republic of China
| | - Zhaoxin Wu
- Key Laboratory of Photonics Technology for Information School of Electronic and Information Engineering , Xi'an Jiaotong University , Xi'an 710049 , People's Republic of China
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Kajjam AB, Vaidyanathan S. Structural Mimics of Phenyl Pyridine (ppy) - Substituted, Phosphorescent Cyclometalated Homo and Heteroleptic Iridium(III) Complexes for Organic Light Emitting Diodes - An Overview. CHEM REC 2017; 18:293-349. [PMID: 28929624 DOI: 10.1002/tcr.201700035] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2017] [Indexed: 01/13/2023]
Abstract
Today organic light emitting diodes are a topic of significant academic and industrial research interest. OLED technology is used in commercially available displays, and efforts have been directed to improve this technology. Design and synthesis of phosphorescent based transition metals are capable of harvesting both singlet and triplet excitons and achieve 100 % internal quantum efficiency is an active area of research. Among all the transition metals, iridium is considered a prime candidate for OLEDs due to its prominent photophysical characteristics. In the present review, we have concentrated on the Iridium based homo and heteroleptic complexes that have dissimilar substitutions on phenylpyridine ligands, different ancillary ligands and the effect of substitution on HOMO/LUMO energies and a brief discussion and correlation on the photophysical, electrochemical and device performances of the different complexes have been reviewed for organic light emitting diodes.
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Affiliation(s)
- Aravind Babu Kajjam
- Department of Chemistry, National Institute of Technology, Rourkela, Odisha, India
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Yang X, Zhou G, Wong WY. Functionalization of phosphorescent emitters and their host materials by main-group elements for phosphorescent organic light-emitting devices. Chem Soc Rev 2015; 44:8484-575. [PMID: 26245654 DOI: 10.1039/c5cs00424a] [Citation(s) in RCA: 393] [Impact Index Per Article: 43.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
Phosphorescent organic light-emitting devices (OLEDs) have attracted increased attention from both academic and industrial communities due to their potential practical application in high-resolution full-color displays and energy-saving solid-state lightings. The performance of phosphorescent OLEDs is mainly limited by the phosphorescent transition metal complexes (such as iridium(III), platinum(II), gold(III), ruthenium(II), copper(I) and osmium(II) complexes, etc.) which can play a crucial role in furnishing efficient energy transfer, balanced charge injection/transporting character and high quantum efficiency in the devices. It has been shown that functionalized main-group element (such as boron, silicon, nitrogen, phosphorus, oxygen, sulfur and fluorine, etc.) moieties can be incorporated into phosphorescent emitters and their host materials to tune their triplet energies, frontier molecular orbital energies, charge injection/transporting behavior, photophysical properties and thermal stability and hence bring about highly efficient phosphorescent OLEDs. So, in this review, the recent advances in the phosphorescent emitters and their host materials functionalized with various main-group moieties will be introduced from the point of view of their structure-property relationship. The main emphasis lies on the important role played by the main-group element groups in addressing the key issues of both phosphorescent emitters and their host materials to fulfill high-performance phosphorescent OLEDs.
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Affiliation(s)
- Xiaolong Yang
- MOE Key Laboratory for Nonequilibrium Synthesis and Modulation of Condensed Matter, State Key Laboratory for Mechanical Behavior of Materials, Department of Chemistry, Faculty of Science, Xi'an Jiaotong University, Xi'an 710049, P. R. China.
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