4.8 Article

Constructing Organic Electroluminescent Material with Very High Color Purity and Efficiency Based on Polycyclization of the Multiple Resonance Parent Core

相关参考文献

注意:仅列出部分参考文献,下载原文获取全部文献信息。
Article Chemistry, Multidisciplinary

Highly Efficient Electroluminescent Materials with High Color Purity Based on Strong Acceptor Attachment onto B-N-Containing Multiple Resonance Frameworks

Yincai Xu et al.

Summary: This article proposes a synthetic methodology for narrowband emission materials by functionalizing multiple resonance skeletons and generating a universal building block. By modulating the acceptor, a series of efficient narrowband green TADF emitters have been constructed. An organic light-emitting diode based on this strategy exhibits pure green emission and high quantum efficiency.

CCS CHEMISTRY (2022)

Article Chemistry, Multidisciplinary

Quenching-Resistant Multiresonance TADF Emitter Realizes 40% External Quantum Efficiency in Narrowband Electroluminescence at High Doping Level

Pengcheng Jiang et al.

Summary: This study introduces a highly emissive molecule with enhanced quenching resistance by segregating the planar MR-TADF skeleton using two bulky carbazolyl units, which significantly improves the performance of corresponding devices with a maximum external quantum efficiency of 40.0% and a full width at half maximum of 25 nm. The steric effect of the bulky carbazolyl units largely removes the formation of detrimental excimers/aggregates, leading to an OLED example that can achieve narrow bandwidth and high EL efficiency surpassing 40% to date.

ADVANCED MATERIALS (2022)

Article Chemistry, Multidisciplinary

Fabrication of Circularly Polarized MR-TADF Emitters with Asymmetrical Peripheral-Lock Enhancing Helical B/N-Doped Nanographenes

Xiugang Wu et al.

Summary: The study demonstrates an integrated system of circularly polarized thermally activated delayed fluorescence and multiple-resonance thermally activated delayed fluorescence, known as CPMR-TADF, which achieves high efficiency, color purity, and circularly polarized light through the strategic design and synthesis of asymmetric stereoisomers.

ADVANCED MATERIALS (2022)

Article Chemistry, Multidisciplinary

Highly Efficient Asymmetric Multiple Resonance Thermally Activated Delayed Fluorescence Emitter with EQE of 32.8 % and Extremely Low Efficiency Roll-Off

Futong Liu et al.

Summary: In this study, a novel asymmetric MRTADF emitter (2Cz-PTZ-BN) is designed with high PLQY and large k(RISC) values, enhancing the performance of pure green OLEDs. It maintains a high EQE even at high luminance, representing the highest value among reported green MR-TADF materials.

ANGEWANDTE CHEMIE-INTERNATIONAL EDITION (2022)

Article Chemistry, Multidisciplinary

One-Shot Synthesis of Expanded Heterohelicene Exhibiting Narrowband Thermally Activated Delayed Fluorescence

Susumu Oda et al.

Summary: An expanded heterohelicene consisting of three BN2-embedded [4]helicene subunits has been successfully synthesized through one-shot triple borylation, resulting in a narrowband sky-blue thermally activated delayed fluorescence. The resonance effect of three boron and six nitrogen atoms minimized the singlet-triplet energy gap, enabling rapid reverse intersystem crossing with a high rate constant. The organic light-emitting diode device, used as an emitter, displayed a narrowband emission with a high external quantum efficiency.

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY (2022)

Article Chemistry, Multidisciplinary

Highly Efficient Asymmetric Multiple Resonance Thermally Activated Delayed Fluorescence Emitter with EQE of 32.8% and Extremely Low Efficiency Roll-Off

Futong Liu et al.

Summary: MR-TADF emitters have potential for high color purity in OLEDs, but achieving high PLQY and k(RISC) simultaneously remains a challenge. The novel asymmetric MRTADF emitter designed in this study achieves high PLQY and fast k(RISC), boosting the performance of pure green devices without using sensitizing hosts.

ANGEWANDTE CHEMIE-INTERNATIONAL EDITION (2022)

Article Chemistry, Multidisciplinary

Stable, High-Efficiency Voltage-Dependent Color-Tunable Organic Light-Emitting Diodes with a Single Tetradentate Platinum(II) Emitter Having Long Operational Lifetime

Mao Mao et al.

Summary: A novel co-host-in-double-emissive-layer (CHIDEL) device has been introduced to enhance the performance of color-tunable OLEDs, achieving tunable CIE coordinates, high color rendering index, and high external quantum efficiency. By optimizing the CHIDEL device and using appropriate emitters, high efficiency and long lifetime of color-tunable OLEDs can be achieved.

ADVANCED MATERIALS (2021)

Article Chemistry, Multidisciplinary

A Modular Cascade Synthetic Strategy Toward Structurally Constrained Boron-Doped Polycyclic Aromatic Hydrocarbons

Jin-Jiang Zhang et al.

Summary: A novel synthetic strategy was developed for the construction of structurally constrained boron-doped polycyclic aromatic hydrocarbons (sc-B-PAHs) with modest yields and broad substrate scope. The resultant compounds show good stability and unique structural features, making them highly attractive for potential optoelectronic applications.

ANGEWANDTE CHEMIE-INTERNATIONAL EDITION (2021)

Article Chemistry, Multidisciplinary

Carbazole-Based DABNA Analogues as Highly Efficient Thermally Activated Delayed Fluorescence Materials for Narrowband Organic Light-Emitting Diodes

Susumu Oda et al.

Summary: Carbazole-based DABNA analogues were synthesized through regioselective one-shot single and double borylation, demonstrating narrowband thermally activated delayed fluorescence. Organic light-emitting diode devices utilizing these products as emitters exhibited deep-blue, sky-blue, and green emission with high external quantum efficiencies.

ANGEWANDTE CHEMIE-INTERNATIONAL EDITION (2021)

Article Chemistry, Multidisciplinary

B,N-Embedded Double Hetero[7]helicenes with Strong Chiroptical Responses in the Visible Light Region

Ji-Kun Li et al.

Summary: This study presents unprecedented B,N-embedded double hetero[7]helicenes with excellent chiroptical properties, high absorption dissymmetry factors, and tunable circularly polarized luminescence, opening up new possibilities for the development of high-performance chiroptical materials in the future.

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY (2021)

Article Chemistry, Multidisciplinary

Peripheral Decoration of Multi-Resonance Molecules as a Versatile Approach for Simultaneous Long-Wavelength and Narrowband Emission

Yanyu Qi et al.

Summary: A new approach of peripherally decorating MR emitter with electron donors enables the emission spectra of MR emitters to red-shift while retaining narrowband emission, leading to the realization of the first narrowband yellow emitter with emission maxima of 562 nm and excellent color purity. Highly efficient OLEDs with an external quantum efficiency of over 24% are fabricated by employing these newly developed MR molecules as emitters.

ADVANCED FUNCTIONAL MATERIALS (2021)

Article Chemistry, Multidisciplinary

Highly Efficient Electroluminescence from Narrowband Green Circularly Polarized Multiple Resonance Thermally Activated Delayed Fluorescence Enantiomers

Yincai Xu et al.

Summary: In this study, highly efficient organic light-emitting diodes that exhibit pure green emission and circularly polarized electroluminescence signal were developed by integrating circularly polarized luminescence and thermally activated delayed fluorescence emission induced by multiple resonance effect. This represents a significant advancement in the field of organic electronics.

ADVANCED MATERIALS (2021)

Review Chemistry, Multidisciplinary

Identification of the Key Parameters for Horizontal Transition Dipole Orientation in Fluorescent and TADF Organic Light-Emitting Diodes

Francisco Tenopala-Carmona et al.

Summary: Horizontal orientation of the emissive transition dipole moment (TDM) in OLEDs can significantly improve light outcoupling efficiency. Determining the drivers of horizontal orientation, such as emitter molecule aspect ratio and glass-transition temperature (T-g), is crucial. While molecular weight and linearity are key parameters for neat systems, host T-g and emitter length and MW become more relevant in host-guest systems with low and high molecular weight emitters, respectively. Future research should aim to establish a comprehensive model of molecular orientation in OLEDs.

ADVANCED MATERIALS (2021)

Article Chemistry, Multidisciplinary

Triarylamine-Pyridine-Carbonitriles for Organic Light-Emitting Devices with EQE Nearly 40%

Yi-Kuan Chen et al.

Summary: The TPAmPPC compound is a highly efficient TADF material with excellent optical properties, demonstrating high photoluminescence quantum yields and superior device performance in OLEDs.

ADVANCED MATERIALS (2021)

Article Chemistry, Multidisciplinary

Multi-Resonance Deep-Red Emitters with Shallow Potential-Energy Surfaces to Surpass Energy-Gap Law

Yuewei Zhang et al.

Summary: Efficient deep-red organic emitters with high quantum efficiencies were developed by constructing polycyclic heteroaromatics with multiple boron and nitrogen atoms. The introduction of specific structures led to restricted π-bonding states and shallow potential energy surfaces, enabling the emitters to achieve high quantum efficiencies in a normal planar organic light-emitting diode structure.

ANGEWANDTE CHEMIE-INTERNATIONAL EDITION (2021)

Article Chemistry, Multidisciplinary

Tetrabenzo[a,c]phenazine Backbone for Highly Efficient Orange-Red Thermally Activated Delayed Fluorescence with Completely Horizontal Molecular Orientation

Umamahesh Balijapalli et al.

Summary: Three TADF molecules PQ1, PQ2, and PQ3, featuring planar acceptor manipulation and high steric hindrance, exhibit high molecular rigidity that suppresses nonradiative decay of excitons, leading to improved photoluminescence quantum yields. PQ3, with well-aligned excited states, enhances reverse intersystem crossing rate constant and displays a high external EL quantum efficiency in the orange-red OLED.

ANGEWANDTE CHEMIE-INTERNATIONAL EDITION (2021)

Article Chemistry, Multidisciplinary

Fused-Nonacyclic Multi-Resonance Delayed Fluorescence Emitter Based on Ladder-Thiaborin Exhibiting Narrowband Sky-Blue Emission with Accelerated Reverse Intersystem Crossing

Masakazu Nagata et al.

Summary: This study successfully developed a new organic luminophore, BSBS-N1, with strong narrowband emission capability and high photoluminescence quantum yield. By introducing boron, nitrogen, and sulfur atoms, as well as spin-orbit coupling of two sulfur atoms, the performance of the luminophore was enhanced, leading to an improvement in the electroluminescence quantum efficiency.

ANGEWANDTE CHEMIE-INTERNATIONAL EDITION (2021)

Article Chemistry, Multidisciplinary

Wide-Range Color Tuning of Narrowband Emission in Multi-resonance Organoboron Delayed Fluorescence Materials through Rational Imine/Amine Functionalization

Minlang Yang et al.

Summary: Establishing a simple and versatile design strategy to modulate emission colors while maintaining high efficiency and color purity is challenging for MR-TADF materials. By introducing specific functional groups, it is possible to achieve fine tuning of emission colors without compromising narrow spectral features, leading to the development of high-efficiency and color-pure organic light-emitting diodes.

ANGEWANDTE CHEMIE-INTERNATIONAL EDITION (2021)

Article Chemistry, Multidisciplinary

Boron-Doped Polycyclic π-Electron Systems with an Antiaromatic Borole Substructure That Forms Photoresponsive B-P Lewis Adducts

Naoki Ando et al.

Summary: Incorporating a five-membered borole ring into a polycyclic aromatic hydrocarbon imparts the pi-system with antiaromatic character, inducing unique properties and behavior. Synthesized borole-embedded pi-conjugated compounds exhibit planar structures and columnar face-to-face pi-stacked structures. One derivative shows intense emission with high quantum yield and high Lewis acidity.

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY (2021)

Article Chemistry, Multidisciplinary

Parent B2N2-Perylenes with Different BN Orientations

Peng-Fei Zhang et al.

Summary: Introducing BN units into polycyclic aromatic hydrocarbons expands the chemical space of conjugated materials with novel properties. The study shows that the orientation of BN has significant effects on the structure, (anti)aromaticity, crystal packing, and photophysical properties. These findings provide guidance for the synthesis of BN-PAHs with specific stacking structures.

ANGEWANDTE CHEMIE-INTERNATIONAL EDITION (2021)

Article Chemistry, Multidisciplinary

Molecular design of thermally activated delayed fluorescent emitters for narrowband orange-red OLEDs boosted by a cyano-functionalization strategy

Yang Liu et al.

Summary: By attaching a cyano functionality at the lowest unoccupied molecular orbital location of the MR-TADF skeleton, the red-shifted emission and good color purity of orange-red MR-TADF emitters can be achieved. The coplanar conformation of the CN group helps to restrict structure relaxation and maintain the high-quality emission characteristics in orange-red TADF-OLEDs.

CHEMICAL SCIENCE (2021)

Article Chemistry, Multidisciplinary

Intramolecular Borylation via Sequential B-Mes Bond Cleavage for the Divergent Synthesis of B,N,B-Doped Benzo[4]helicenes

Julius A. Knoeller et al.

ANGEWANDTE CHEMIE-INTERNATIONAL EDITION (2020)

Article Chemistry, Multidisciplinary

A Deep Blue B,N-Doped Heptacene Emitter That Shows Both Thermally Activated Delayed Fluorescence and Delayed Fluorescence by Triplet-Triplet Annihilation

Subeesh Madayanad Suresh et al.

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY (2020)

Article Chemistry, Multidisciplinary

Achieving Pure Green Electroluminescence with CIEy of 0.69 and EQE of 28.2% from an Aza-Fused Multi-Resonance Emitter

Yuewei Zhang et al.

ANGEWANDTE CHEMIE-INTERNATIONAL EDITION (2020)

Article Chemistry, Physical

Highly efficient luminescence from space-confined charge-transfer emitters

Xun Tang et al.

NATURE MATERIALS (2020)

Article Chemistry, Multidisciplinary

Full-Color, Narrowband, and High-Efficiency Electroluminescence from Boron and Carbazole Embedded Polycyclic Heteroaromatics

Minlang Yang et al.

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY (2020)

Article Chemistry, Multidisciplinary

BN-Embedded Tetrabenzopentacene: A Pentacene Derivative with Improved Stability

Fang-Dong Zhuang et al.

ANGEWANDTE CHEMIE-INTERNATIONAL EDITION (2019)

Article Chemistry, Multidisciplinary

Multi-Resonance Induced Thermally Activated Delayed Fluorophores for Narrowband Green OLEDs

Yuewei Zhang et al.

ANGEWANDTE CHEMIE-INTERNATIONAL EDITION (2019)

Article Chemistry, Multidisciplinary

One-Shot Multiple Borylation toward BN-Doped Nanographenes

Kohei Matsui et al.

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY (2018)

Review Chemistry, Multidisciplinary

Origin and Control of Orientation of Phosphorescent and TADF Dyes for High-Efficiency OLEDs

Kwon-Hyeon Kim et al.

ADVANCED MATERIALS (2018)

Article Chemistry, Multidisciplinary

Peripheral Amplification of Multi-Resonance Induced Thermally Activated Delayed Fluorescence for Highly Efficient OLEDs

Xiao Liang et al.

ANGEWANDTE CHEMIE-INTERNATIONAL EDITION (2018)

Article Chemistry, Multidisciplinary

De Novo Design of Excited-State Intramolecular Proton Transfer Emitters via a Thermally Activated Delayed Fluorescence Channel

Kailong Wu et al.

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY (2018)

Article Chemistry, Multidisciplinary

B-N-B Bond Embedded Phenalenyl and Its Anions

Haipeng Wei et al.

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY (2017)

Article Chemistry, Multidisciplinary

Divergent Synthesis of Heteroatom-Centered 4,8,12-Triazatriangulenes

Soichiro Nakatsuka et al.

ANGEWANDTE CHEMIE-INTERNATIONAL EDITION (2017)

Review Chemistry, Multidisciplinary

Recent advances in organic thermally activated delayed fluorescence materials

Zhiyong Yang et al.

CHEMICAL SOCIETY REVIEWS (2017)

Article Chemistry, Multidisciplinary

A New Molecular Design Based on Thermally Activated Delayed Fluorescence for Highly Efficient Organic Light Emitting Diodes

Pachaiyappan Rajamalli et al.

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY (2016)

Article Chemistry, Multidisciplinary

A grossly warped nanographene and the consequences of multiple odd-membered-ring defects

Katsuaki Kawasumi et al.

NATURE CHEMISTRY (2013)

Review Chemistry, Multidisciplinary

From Nanographene and Graphene Nanoribbons to Graphene Sheets: Chemical Synthesis

Long Chen et al.

ANGEWANDTE CHEMIE-INTERNATIONAL EDITION (2012)

Article Chemistry, Multidisciplinary

A Boron-Containing PAH as a Substructure of Boron-Doped Graphene

Chuandong Dou et al.

ANGEWANDTE CHEMIE-INTERNATIONAL EDITION (2012)

Article Multidisciplinary Sciences

Highly efficient organic light-emitting diodes from delayed fluorescence

Hiroki Uoyama et al.

NATURE (2012)

Article Chemistry, Multidisciplinary

Direct Arylation of Polycyclic Aromatic Hydrocarbons through Palladium Catalysis

Kenji Mochida et al.

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY (2011)