Iridium(III) Phosphors-Bearing Functional 9-Phenyl7,9-dihydro-8H-purin-8-ylidene Chelates and Blue Hyperphosphorescent OLED Devices

Article Materials Science, Multidisciplinary

High Performance Solution-Processed Deep-Blue Phosphorescence Organic Light-Emitting Diodes with EQE Over 24% by Employing New Carbenic Ir(III) Complexes

Raja Kumaresan et al.

Summary: The introduction of new carbene-based Ir(III) complexes for solution-processed PHOLEDs has led to efficient devices with high EQE values and color purity.

ADVANCED OPTICAL MATERIALS (2022)

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Article Nanoscience & Nanotechnology

Homoleptic Ir(III) Phosphors with 2-Phenyl-1,2,4-triazol-3-ylidene Chelates for Efficient Blue Organic Light-Emitting Diodes

Caifa You et al.

Summary: In this study, two series of deep-blue-emitting homoleptic iridium(III) phosphors were synthesized using a different strategy to achieve high yields. The phosphors were examined through various spectroscopic and structural analysis methods, revealing their potential as deep-blue emitters for OLEDs. OLED devices based on these phosphors showed promising external quantum efficiencies and emission characteristics.

ACS APPLIED MATERIALS & INTERFACES (2021)

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Review Chemistry, Multidisciplinary

A Brief History of OLEDs-Emitter Development and Industry Milestones

Gloria Hong et al.

Summary: Organic light-emitting diodes (OLEDs) have undergone significant development over the past 30 years, with advancements in emitter materials leading to three generations of OLED devices. Research is now focused on the fourth generation of OLEDs, with academia and industry achieving milestones in the development of green, orange-red, and blue OLED emitters.

ADVANCED MATERIALS (2021)

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Article Optics

Stable pure-blue hyperfluorescence organic light-emitting diodes with high-efficiency and narrow emission

Chin-Yiu Chan et al.

Summary: This study presents pure-blue OLEDs with high efficiency, narrow emission, and good stability, showing promise for display applications. The design is based on a two-unit stacked tandem hyperfluorescence OLED with strict control of device fabrication and procedures to further improve device lifetimes.

NATURE PHOTONICS (2021)

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Review Chemistry, Multidisciplinary

Excited-State Engineering in Heteroleptic Ionic Iridium(III) Complexes

Filippo Monti et al.

Summary: Iridium(III) complexes play a significant role in photochemistry and photophysics due to their stability and emissive properties. The heavy-atom effect of iridium promotes singlet-triplet transitions, with the complexes exhibiting metal-centered, ligand-centered, or charge transfer properties in the excited state. The design of ligands allows for fine tuning of the electronic properties, making iridium(III) complexes a valuable tool in optoelectronic devices.

ACCOUNTS OF CHEMICAL RESEARCH (2021)

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Article Optics

High-efficiency, long-lifetime deep-blue organic light-emitting diodes

Soon Ok Jeon et al.

Summary: By combining a new design of blue TADF materials with a triplet-exciton recycling protocol, high efficiency and long lifetime were achieved in deep-blue organic light-emitting diodes.

NATURE PHOTONICS (2021)

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Review Materials Science, Multidisciplinary

Blue Emissive fac/mer-Iridium (III) NHC Carbene Complexes and their Application in OLEDs

Muazzam Idris et al.

Summary: The photophysical and electrochemical properties of N-heterocyclic carbene complexes of Iridium (III) were studied, showing differences in emission maxima and quantum yield in different solvents. The complexes exhibited efficient emission in polystyrene at room temperature and low temperatures. Notably, fac-Ir(tpz)(3) showed high external electroluminescence efficiency and brightness in blue phosphorescent organic light emitting diodes.

ADVANCED OPTICAL MATERIALS (2021)

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Article Nanoscience & Nanotechnology

Rational Tuning of Bis-Tridentate Ir(III) Phosphors to Deep-Blue with High Efficiency and Sub-microsecond Lifetime

Wun-Shan Tai et al.

Summary: A new class of bis-tridentate Ir(III) complexes was synthesized and their emission tuning between the ultraviolet and blue region was rationalized using time-dependent density functional theory (TD-DFT) approaches. A highly efficient blue emitter was successfully synthesized and used to fabricate practical blue-emitting OLEDs with superior performance.

ACS APPLIED MATERIALS & INTERFACES (2021)

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Article Materials Science, Multidisciplinary

Over 30 000 h Device Lifetime in Deep Blue Organic Light-Emitting Diodes with y Color Coordinate of 0.086 and Current Efficiency of 37.0 cd A-1

Won Jae Chung et al.

Summary: Efficiency and lifetime issues of deep blue OLEDs are resolved by engineering the device architecture to manage triplet excitons of phosphorescence and TADF emitters. The EPHTADF device, combining CN-modified iridium emitter and boron-based TADF emitter, demonstrates high current efficiency, long device lifetime, and deep blue color coordinates. This work shows the potential of EPHTADF devices to address problematic issues in blue OLEDs.

ADVANCED OPTICAL MATERIALS (2021)

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Article Chemistry, Multidisciplinary

Improved Efficiency and Lifetime of Deep-Blue Hyperfluorescent Organic Light-Emitting Diode using Pt(II) Complex as Phosphorescent Sensitizer

Sungho Nam et al.

Summary: In this study, a novel hyperfluorescent OLED was proposed, incorporating a Pt(II) complex as a phosphorescent sensitizer and a hydrocarbon-based and multiple resonance-based fluorophore as an emitter, which significantly improved the efficiency and lifetime of the device. The findings showed that using a multiple resonance-based fluorophore in OLEDs can lead to better understanding and higher performance.

ADVANCED SCIENCE (2021)

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Article Materials Science, Multidisciplinary

Homoleptic cyclometalated dibenzothiophene-NHC-iridium(iii) complexes for efficient blue phosphorescent organic light-emitting diodes

Bo-Sun Yun et al.

Summary: In this study, NHC-Ir complexes utilizing DBT and DBF moieties to enhance deep-blue phosphorescence emission efficiency were synthesized and compared for their electrochemical and photophysical properties. The use of DBT moieties resulted in longer emission wavelengths, while the meridional isomer exhibited easier oxidation and red-shifted emission compared to facial forms. The replacement of the oxygen atom in the DBF unit with sulfur did not significantly alter the emission efficiency, achieving high-end deep-blue phosphorescence with unprecedented CIE coordinates.

JOURNAL OF MATERIALS CHEMISTRY C (2021)

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Article Materials Science, Multidisciplinary

High efficiency and long lifetime fluorescent white organic light-emitting diodes by phosphor sensitization to strategically manage singlet and triplet excitons

Jingwen Yao et al.

Summary: Fluorescent white organic light-emitting diodes (WOLEDs) with high efficiency, low-efficiency roll-off, and long lifetime were achieved through strategic control of the position of phosphor-sensitized fluorescent yellow emitter. Singlet excitons are utilized for blue emission and triplet excitons for yellow emission in optimized WOLEDs, demonstrating great potential for practical applications.

JOURNAL OF MATERIALS CHEMISTRY C (2021)

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Article Chemistry, Multidisciplinary

External Quantum Efficiency Exceeding 24% with CIEy Value of 0.08 using a Novel Carbene-Based Iridium Complex in Deep-Blue Phosphorescent Organic Light-Emitting Diodes

Ho-Yeol Park et al.

ADVANCED MATERIALS (2020)

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Review Chemistry, Inorganic & Nuclear

PhosphorescentTris-Bidentate IrIIIComplexes with N-Heterocyclic Carbene Scaffolds: Structural Diversity and Optical Properties

Anna Bonfiglio et al.

EUROPEAN JOURNAL OF INORGANIC CHEMISTRY (2020)

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Review Materials Science, Multidisciplinary

Recent Advances in Solid-State Lighting Devices Using Transition Metal Complexes Exhibiting Thermally Activated Delayed Fluorescent Emission Mechanism

Gilbert Umuhire Mahoro et al.

ADVANCED OPTICAL MATERIALS (2020)

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Article Chemistry, Inorganic & Nuclear

Photofunctionality of iron(III) N-heterocyclic carbenes and related d transition metal complexes

Pavel Chábera et al.

COORDINATION CHEMISTRY REVIEWS (2020)

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Review Chemistry, Inorganic & Nuclear

Cyclometalated Ir(iii) complexes towards blue-emissive dopant for organic light-emitting diodes: fundamentals of photophysics and designing strategies

Sunhee Lee et al.

INORGANIC CHEMISTRY FRONTIERS (2020)

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Article Chemistry, Multidisciplinary

A bipolar host based high triplet energy electroplex for an over 10 000 h lifetime in pure blue phosphorescent organic light-emitting diodes

Mina Jung et al.

MATERIALS HORIZONS (2020)

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Review Chemistry, Multidisciplinary

Degradation Mechanisms in Blue Organic Light-Emitting Diodes

Dan Wang et al.

CCS CHEMISTRY (2020)

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Article Optics

Narrowband deep-blue organic light-emitting diode featuring an organoboron-based emitter

Yasuhiro Kondo et al.

NATURE PHOTONICS (2019)

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Article Nanoscience & Nanotechnology

Triplet Harvesting by a Fluorescent Emitter Using a Phosphorescent Sensitizer for Blue Organic-Light-Emitting Diodes

Hyun-Gu Kim et al.

ACS APPLIED MATERIALS & INTERFACES (2019)

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Review Materials Science, Multidisciplinary

Blue organic light-emitting diodes: current status, challenges, and future outlook

Jiun-Haw Lee et al.

JOURNAL OF MATERIALS CHEMISTRY C (2019)

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Article Materials Science, Multidisciplinary

High efficiency blue/green/yellow/red fluorescent organic light-emitting diodes sensitized by phosphors: general design rules and electroluminescence performance analysis

Jingwen Yao et al.

JOURNAL OF MATERIALS CHEMISTRY C (2019)

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Article Chemistry, Physical

Photophysical properties of structural isomers of homoleptic Ir-complexes derived from xylenyl-substituted N-heterocyclic carbene ligands

Bo-Sun Yun et al.

PHYSICAL CHEMISTRY CHEMICAL PHYSICS (2019)

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Article Materials Science, Multidisciplinary

Phosphor sensitized thermally activated delayed fluorescence organic light-emitting diodes with ideal deep blue device performances

Kyung Hyung Lee et al.

JOURNAL OF MATERIALS CHEMISTRY C (2019)

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Review Chemistry, Inorganic & Nuclear

N-Heterocyclic carbene transition metal complexes in light emitting devices

M. Elie et al.

POLYHEDRON (2018)

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Article Multidisciplinary Sciences

Degradation of blue-phosphorescent organic light-emitting devices involves exciton-induced generation of polaron pair within emitting layers

Sinheui Kim et al.

NATURE COMMUNICATIONS (2018)

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Article Chemistry, Multidisciplinary

High Efficiency Deep-Blue Phosphorescent Organic Light-Emitting Diodes with CIE x, y (<= 0.15) and Low Efficiency Roll-Off by Employing a High Triplet Energy Bipolar Host Material

Athithan Maheshwaran et al.

ADVANCED FUNCTIONAL MATERIALS (2018)

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Article Chemistry, Multidisciplinary

High-Efficiency Deep-Blue-Emitting Organic Light-Emitting Diodes Based on Iridium(III) Carbene Complexes

Amlan K. Pal et al.

ADVANCED MATERIALS (2018)

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Article Chemistry, Inorganic & Nuclear

Phosphorescence Properties of Discrete Platinum(II) Complex Anions Bearing N-Heterocyclic Carbenes in the Solid State

Tomohiro Ogawa et al.

INORGANIC CHEMISTRY (2018)

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Article Multidisciplinary Sciences

Unicolored phosphor-sensitized fluorescence for efficient and stable blue OLEDs

Paul Heimel et al.

NATURE COMMUNICATIONS (2018)

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Review Materials Science, Multidisciplinary

Degradation Mechanism and Lifetime Improvement Strategy for Blue Phosphorescent Organic Light-Emitting Diodes

Wook Song et al.

ADVANCED OPTICAL MATERIALS (2017)

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Article Materials Science, Multidisciplinary

Probing photophysical properties of isomeric N-heterocyclic carbene Ir(III) complexes and their applications to deep-blue phosphorescent organic light-emitting diodes

Yang-Jin Cho et al.

JOURNAL OF MATERIALS CHEMISTRY C (2017)

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Review Chemistry, Inorganic & Nuclear

Over the LEC rainbow: Colour and stability tuning of cyclometallated iridium(III) complexes in light-emitting electrochemical cells

Catherine E. Housecroft et al.

COORDINATION CHEMISTRY REVIEWS (2017)

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Article Nanoscience & Nanotechnology

Cyclometalated Iridium(III) Carbene Phosphors for Highly Efficient Blue Organic Light-Emitting Diodes

Zhao Chen et al.

ACS APPLIED MATERIALS & INTERFACES (2017)

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Review Chemistry, Inorganic & Nuclear

Emissive bis-tridentate Ir(III) metal complexes: Tactics, photophysics and applications

Yun Chi et al.

COORDINATION CHEMISTRY REVIEWS (2017)

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Article Chemistry, Multidisciplinary

Recent Progress in High-Efficiency Blue-Light-Emitting Materials for Organic Light-Emitting Diodes

Yirang Im et al.

ADVANCED FUNCTIONAL MATERIALS (2017)

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Article Chemistry, Applied

Highly efficient, conventional and flexible deep-red phosphorescent OLEDs using ambipolar thiophene/selenophene-phenylquinoline ligand-based Ir(III) complexes

Woosum Cho et al.

DYES AND PIGMENTS (2017)

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Article Chemistry, Physical

Deep blue phosphorescent organic light-emitting diodes with very high brightness and efficiency

Jaesang Lee et al.

NATURE MATERIALS (2016)

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Article Chemistry, Multidisciplinary

Bis-Tridentate Ir(III) Complexes with Nearly Unitary RGB Phosphorescence and Organic Light-Emitting Diodes with External Quantum Efficiency Exceeding 31%

Chu-Yun Kuei et al.

ADVANCED MATERIALS (2016)

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Article Chemistry, Inorganic & Nuclear

Enhanced Photoluminescence Quantum Yields through Excimer Formation of Cyclometalated Platinum(II) N-Heterocyclic Carbene Complexes

Piermaria Pinter et al.

ORGANOMETALLICS (2016)

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Review Chemistry, Multidisciplinary

N-heterocyclic carbene metal complexes: photoluminescence and applications

Renso Visbal et al.

CHEMICAL SOCIETY REVIEWS (2014)

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Article Materials Science, Multidisciplinary

Highly efficient phosphorescent organic light-emitting diodes using a homoleptic iridium(III) complex as a sky-blue dopant

Jinyong Zhuang et al.

ORGANIC ELECTRONICS (2013)

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Review Chemistry, Multidisciplinary

Organic Materials for Deep Blue Phosphorescent Organic Light-Emitting Diodes

Kyoung Soo Yook et al.

ADVANCED MATERIALS (2012)

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Review Chemistry, Multidisciplinary

Synthetic Routes to N-Heterocyclic Carbene Precursors

Laure Benhamou et al.

CHEMICAL REVIEWS (2011)

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Review Chemistry, Inorganic & Nuclear

The triplet state of organo-transition metal compounds. Triplet harvesting and singlet harvesting for efficient OLEDs

Hartmut Yersin et al.

COORDINATION CHEMISTRY REVIEWS (2011)

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Article Materials Science, Multidisciplinary

Feeling blue? Blue phosphors for OLEDs

Hungshin Fu et al.

MATERIALS TODAY (2011)

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Article Chemistry, Multidisciplinary

High-Efficiency Blue and White Organic Light-Emitting Devices Incorporating a Blue Iridium Carbene Complex

Hisahiro Sasabe et al.

ADVANCED MATERIALS (2010)

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Review Chemistry, Multidisciplinary

Transition-metal phosphors with cyclometalating ligands: fundamentals and applications

Yun Chi et al.

CHEMICAL SOCIETY REVIEWS (2010)

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Review Chemistry, Physical

Time-dependent density-functional theory for molecules and molecular solids

Mark E. Casida

JOURNAL OF MOLECULAR STRUCTURE-THEOCHEM (2009)

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Article Chemistry, Multidisciplinary

Highly efficient blue-emitting iridium(III) carbene complexes and phosphorescent OLEDs

Chiung-Fang Chang et al.

ANGEWANDTE CHEMIE-INTERNATIONAL EDITION (2008)

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Article Chemistry, Multidisciplinary

Novel electron-transport material containing boron atom with a high triplet excited energy level

Daisaku Tanaka et al.

CHEMISTRY LETTERS (2007)

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Review Chemistry, Multidisciplinary

Phosphorescent dyes for organic light-emitting diodes

Pi-Tai Chou et al.

CHEMISTRY-A EUROPEAN JOURNAL (2007)

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Article Chemistry, Inorganic & Nuclear

Blue and near-UV phosphorescence from iridium complexes with cyclometalated pyrazolyl or N-heterocyclic carbene ligands

T Sajoto et al.

INORGANIC CHEMISTRY (2005)

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Article Physics, Applied

100% phosphorescence quantum efficiency of Ir(III) complexes in organic semiconductor films

Y Kawamura et al.

APPLIED PHYSICS LETTERS (2005)

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Article Multidisciplinary Sciences

High-efficiency fluorescent organic light-emitting devices using a phosphorescent sensitizer

MA Baldo et al.

NATURE (2000)

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Iridium(III) Phosphors-Bearing Functional 9-Phenyl7,9-dihydro-8H-purin-8-ylidene Chelates and Blue Hyperphosphorescent OLED Devices

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