☆ 4.6 Article

Highly efficient near-infrared thermally activated delayed fluorescence organic light-emitting diodes with emission beyond 800 nm

JOURNAL OF MATERIALS CHEMISTRY C (2023)

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 Materials Science, Multidisciplinary

Achieving 34.3% External Quantum Efficiency for Red Thermally Activated Delayed Fluorescence Organic Light-Emitting Diode by Molecular Isomer Engineering

Tong Yang et al.

Summary: A pair of red thermally activated delayed fluorescence (TADF) isomers were developed through isomer engineering, achieving high photoluminescence quantum efficiency, small singlet-triplet energy split, and large horizontal emitting dipole ratio. The red electroluminescent device based on TPA-APQDCN-C achieved the highest external quantum efficiency of 34.3% with an emission peak at 610 nm among red TADF-OLEDs with emission maximum beyond 600 nm ever reported.

ADVANCED OPTICAL MATERIALS (2023)

添加到收藏夹

Article Materials Science, Multidisciplinary

Donor or Acceptor: Molecular Engineering Based on dibenzo[a,c]phenazine Backbone for Highly Efficient Thermally-Activated Delayed Fluorescence Organic Light-Emitting Diodes

Yanyan Liu et al.

Summary: In the design of TADF materials, the structure of the donor-acceptor framework significantly affects the photophysical and electroluminescence properties. This study investigated different D-A frameworks and found that the APZ structure showed the best performance based on theoretical and experimental results.

ADVANCED OPTICAL MATERIALS (2023)

添加到收藏夹

Article Engineering, Environmental

Positive isotope effect in thermally activated delayed fluorescence emitters based on deuterium-substituted donor units

Jin-Feng Cheng et al.

Summary: Isotope effect has been widely used in the study of organic reactions and semiconductor transport behaviors. This study investigated the isotope effect in TADF materials by designing and synthesizing deuterium-substituted TADF emitters, which showed an enhancement in luminescence efficiency and thermal stability. The positive isotope effect was attributed to the increase in normal mode displacement and Huang-Rhys factor of deuterated TADF, leading to improved electroluminescence performance.

CHEMICAL ENGINEERING JOURNAL (2022)

添加到收藏夹

Article Engineering, Environmental

Interrupted intramolecular donor-acceptor interaction compensated by strong through-space electronic coupling for highly efficient near-infrared TADF with emission over 800 nm

Jin-Feng Cheng et al.

Summary: By introducing strong D/A fragments and strong through-space electronic coupling between TADF molecules, a novel NIR TADF material (AQTC-DTPA) with emission wavelength over 800 nm was successfully developed. TADF OLEDs based on AQTC-DTPA exhibited record-high maximum External Quantum Efficiencies with Electroluminescence peak wavelengths.

CHEMICAL ENGINEERING JOURNAL (2022)

添加到收藏夹

Article Chemistry, Multidisciplinary

An extended π-backbone for highly efficient near-infrared thermally activated delayed fluorescence with enhanced horizontal molecular orientation

Jian-Li He et al.

Summary: A novel D-A1-A2-A3 configuration was developed for designing NIR-TADF materials with emission over 700 nm. The incorporation of multiple sub-acceptor units and an extended pi-backbone in the molecule led to record-high external quantum efficiency and enhanced emitting dipole orientation. This approach enriches the design strategy for NIR-TADF materials and improves the efficiency of emitters.

MATERIALS HORIZONS (2022)

添加到收藏夹

Article Engineering, Environmental

2,3-Dicyanopyrazino phenanthroline enhanced charge transfer for efficient near-infrared thermally activated delayed fluorescent diodes

Huiqin Wang et al.

Summary: This study reports a NIR TADF molecule composed of 2,3-dicyanopyrazino phenanthroline and triphenylamine, which exhibits efficient NIR photoluminescence emission and achieves high-efficiency NIR emissions in organic light-emitting diodes.

CHEMICAL ENGINEERING JOURNAL (2022)

添加到收藏夹

Article Engineering, Environmental

Creating efficient delayed fluorescence luminogens with acridine-based spiro donors to improve horizontal dipole orientation for high-performance OLEDs

Ruishan Huang et al.

Summary: This study reports a new type of delayed fluorescence luminogens with excellent thermal stability, aggregation-enhanced delayed fluorescence, high photoluminescence quantum yields, preferable horizontal dipole orientation, and balanced bipolar charge transport. The OLEDs based on these luminogens exhibit high external quantum efficiency and small efficiency roll-off, demonstrating their great potential in the fabrication of highly efficient OLEDs.

CHEMICAL ENGINEERING JOURNAL (2022)

添加到收藏夹

Article Chemistry, Multidisciplinary

Highly Efficient and Stable Blue Organic Light-Emitting Diodes based on Thermally Activated Delayed Fluorophor with Donor-Void-Acceptor Motif

Dongdong Zhang et al.

Summary: This study proposes a novel D-void-A structure for TADF emitters, which achieves high efficiency and blue-shifted emission by connecting D and A moieties at the void position between donor and acceptor segments. Compared to the contrast D-A isomers, the TADF emitter in this study exhibits more efficient and blue-shifted emission. Additionally, the involvement of the lower HOMO-2 of the acceptor segment in conjugation provides a wider energy gap.

ADVANCED SCIENCE (2022)

添加到收藏夹

Article Materials Science, Multidisciplinary

Engineering Intramolecular π-Stacking Interactions of Through-Space Charge-Transfer TADF Emitters for Highly Efficient OLEDs with Improved Color Purity

Junjie Wang et al.

Summary: This study found that by confining rigid and planar N- and B-centered donor and acceptor in sandwich-type structures, high-efficiency and improved color purity green TADF emissions can be achieved. Strong noncovalent pi-stacking interactions reduce intramolecular motions and enhance electronic coupling, further enhancing emission performance.

ADVANCED OPTICAL MATERIALS (2022)

添加到收藏夹

Article Optics

Efficient selenium-integrated TADF OLEDs with reduced roll-off

Yu Xuan Hu et al.

Summary: This study reports a heavy-atom incorporating emitter, BNSeSe, based on a selenium-integrated boron-nitrogen skeleton, which exhibits high photoluminescence quantum yield and fast reverse intersystem crossing rate. By utilizing BNSeSe, green OLEDs demonstrate high operational efficiency and significantly reduced efficiency roll-off at high brightness.

NATURE PHOTONICS (2022)

添加到收藏夹

Article Materials Science, Multidisciplinary

Approaching 800 nm near-infrared thermally activated delay fluorescence materials via simple malononitrile condensation strategy

Qian Li et al.

Summary: The development of organic materials with near-infrared thermally activated delayed fluorescence (NIR TADF) has attracted increasing attention. In this study, a strong electron acceptor fluoren-9-ylidene malononitrile (FM) was developed and used to synthesize two novel molecules 3TPAFM and 36DTPAFM with pure NIR TADF. These molecules demonstrated high thermal stability and achieved pure NIR emission at 802 nm in neat films.

ORGANIC ELECTRONICS (2022)

添加到收藏夹

Article Nanoscience & Nanotechnology

The Role of Balancing Carrier Transport in Realizing an Efficient Orange-Red Thermally Activated Delayed-Fluorescence Organic Light-Emitting Diode

Ji -Hua Tan et al.

Summary: The synthesis of two isomeric orange-red TADF emitters with similar good PL properties and the demonstration of higher quantum efficiency in an orange-red OLED using oPDM as the emitter suggest the importance of balanced carrier-transporting properties in achieving improved device performance in TADF emitters.

ACS APPLIED MATERIALS & INTERFACES (2022)

添加到收藏夹

Article Engineering, Environmental

High-performance non-doped near ultraviolet OLEDs with the EQE ∼ 6 % and CIEy ∼ 0.03 from high-lying reverse intersystem crossing

Ling Peng et al.

Summary: In this work, a coupling hardness with distortion design concept was proposed to develop an efficient near ultraviolet (NUV) fluorophor mP2MPC for organic light-emitting diodes (OLEDs). The non-doped OLED with mP2MPC as emitter exhibited a high forward-viewing external quantum efficiency of 6.09% and a small efficiency roll-off below 400 nm, making it one of the highest efficiencies among non-doped devices with electroluminescence peak below 400 nm. Additionally, mP2MPC also showed excellent electroluminescence performance in green and red phosphorescent OLEDs with forward-viewing external quantum efficiencies over 21.5%.

CHEMICAL ENGINEERING JOURNAL (2022)

添加到收藏夹

Review Chemistry, Multidisciplinary

NIR TADF emitters and OLEDs: challenges, progress, and perspectives

Yuxin Xiao et al.

Summary: Near-infrared TADF emitters have great potential in the field of OLEDs, with promising high efficiencies. However, their development has been relatively slower, attracting increased attention. This review summarizes the recent progress and performance data of near-infrared TADF emitters.

CHEMICAL SCIENCE (2022)

添加到收藏夹

Article Engineering, Environmental

High-efficiency red thermally activated delayed fluorescence emitters based on benzothiophene-fused spiro-acridine donor

Xu Gong et al.

Summary: By designing rigid and strong electron-rich donor moieties, researchers synthesized two red emitters with high rigidity and linear D-A molecular skeleton, showing distinct TADF nature and high efficiencies. The resulting OLEDs achieved high external quantum efficiency and excellent emission characteristics in the red color gamut.

CHEMICAL ENGINEERING JOURNAL (2021)

添加到收藏夹

Article Optics

The role of host-guest interactions in organic emitters employing MR-TADF

Xiugang Wu et al.

Summary: The study reveals that effective multiple-resonance thermally activated delayed fluorescence requires suitable host-guest interactions to boost TADF. Additionally, this boosted-TADF mechanism can be applied to any fluorescence dye with a thermally accessible energy gap, enabling the development of high-performance organic light-emitting diodes.

NATURE PHOTONICS (2021)

添加到收藏夹

Article Materials Science, Multidisciplinary

Realization of exceeding 80% external quantum efficiency in organic light-emitting diodes using high-index substrates and highly horizontal emitters

Bo-Kai Wang et al.

Summary: The combination of high-index substrates and horizontal-dipole emitters, along with other optimized conditions, can greatly enhance the optical out-coupling efficiency, leading to the successful realization of OLED devices with external quantum efficiency exceeding 80%.

ORGANIC ELECTRONICS (2021)

添加到收藏夹

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)

添加到收藏夹

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)

添加到收藏夹

Article Chemistry, Multidisciplinary

Realizing Record-High Electroluminescence Efficiency of 31.5 % for Red Thermally Activated Delayed Fluorescence Molecules

Zheyi Cai et al.

Summary: Tailor-made red TADF molecules with intramolecular hydrogen bonding show NIR emissions in neat films and red delayed fluorescence in doped films, with high photoluminescence quantum yields. They exhibit high optical out-coupling factors due to their horizontal orientation in films. The non-doped OLEDs emit NIR lights with maximum external quantum efficiencies, while doped OLEDs achieve record-breaking efficiency levels with red lights emission. These new red TADF materials have great potentials in display and lighting devices.

ANGEWANDTE CHEMIE-INTERNATIONAL EDITION (2021)

添加到收藏夹

Article Materials Science, Multidisciplinary

Rational design of perfectly oriented thermally activated delayed fluorescence emitter for efficient red electroluminescence

Xuan Zeng et al.

Summary: This study successfully achieved active control of the dipole orientation of organic emitters by designing a linear TADF molecule, PhNAI-PMSBA, with an emitting dipole orientation ratio of 95%, substantially higher than traditional emitters. This unique feature is attributed to the inherently horizontal molecular orientation of the molecule and the good agreement between its transition dipole moment direction and molecular long axis.

SCIENCE CHINA-MATERIALS (2021)

添加到收藏夹

Article Chemistry, Multidisciplinary

Near-Infrared Electroluminescence beyond 800 nm with High Efficiency and Radiance from Anthracene Cored Emitters

You-Jun Yu et al.

ANGEWANDTE CHEMIE-INTERNATIONAL EDITION (2020)

添加到收藏夹

Article Chemistry, Multidisciplinary

A Simple and Strong Electron-Deficient 5,6-Dicyano[2,1,3]benzothiadiazole-Cored Donor-Acceptor-Donor Compound for Efficient Near Infrared Thermally Activated Delayed Fluorescence

Jakkapan Kumsampao et al.

CHEMISTRY-AN ASIAN JOURNAL (2020)

添加到收藏夹

Article Chemistry, Multidisciplinary

Near-infrared-II thermally activated delayed fluorescence organic light-emitting diodes

Qingxin Liang et al.

CHEMICAL COMMUNICATIONS (2020)

添加到收藏夹

Article Chemistry, Multidisciplinary

Highly Efficient Thermally Activated Delayed Fluorescence via J-Aggregates with Strong Intermolecular Charge Transfer

Jie Xue et al.

ADVANCED MATERIALS (2019)

添加到收藏夹

Article Chemistry, Physical

Construction of Efficient Deep-Red/Near-Infrared Emitter Based on a Large π-Conjugated Acceptor and Delayed Fluorescence OLEDs with External Quantum Efficiency of over 20%

Tong Yang et al.

JOURNAL OF PHYSICAL CHEMISTRY C (2019)

添加到收藏夹

Article Chemistry, Multidisciplinary

A Simple Molecular Design Strategy for Delayed Fluorescence toward 1000 nm

Daniel G. Congrave et al.

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY (2019)

添加到收藏夹

Review Chemistry, Multidisciplinary

Near-Infrared (NIR) Organic Light-Emitting Diodes (OLEDs): Challenges and Opportunities

Andrea Zampetti et al.

ADVANCED FUNCTIONAL MATERIALS (2019)

添加到收藏夹

Article Optics

High-efficiency electroluminescence and amplified spontaneous emission from a thermally activated delayed fluorescent near-infrared emitter

Dae-Hyeon Kim et al.

NATURE PHOTONICS (2018)

添加到收藏夹

Article Nanoscience & Nanotechnology

Control of Dual Conformations: Developing Thermally Activated Delayed Fluorescence Emitters for Highly Efficient Single-Emitter White Organic Light-Emitting Diodes

Kai Wang et al.

ACS APPLIED MATERIALS & INTERFACES (2018)

添加到收藏夹

Article Materials Science, Multidisciplinary

Achieving Hybridized Local and Charge-Transfer Excited State and Excellent OLED Performance Through Facile Doping

Wang Zhang Yuan et al.

ADVANCED OPTICAL MATERIALS (2017)

添加到收藏夹

Article Chemistry, Multidisciplinary

Avoiding Energy Loss on TADF Emitters: Controlling the Dual Conformations of D-A Structure Molecules Based on the Pseudoplanar Segments

Kai Wang et al.

ADVANCED MATERIALS (2017)

添加到收藏夹

Article Chemistry, Multidisciplinary

Over 10% EQE Near-Infrared Electroluminescence Based on a Thermally Activated Delayed Fluorescence Emitter

Yi Yuan et al.

ADVANCED FUNCTIONAL MATERIALS (2017)

添加到收藏夹

Article Nanoscience & Nanotechnology

Highly Efficient Long-Wavelength Thermally Activated Delayed Fluorescence OLEDs Based on Dicyanopyrazino Phenanthrene Derivatives

Shipan Wang et al.

ACS APPLIED MATERIALS & INTERFACES (2017)

添加到收藏夹

Article Chemistry, Multidisciplinary

Accurate description of hybridized local and charge-transfer excited-state in donor-acceptor molecules using density functional theory

Y. Y. Pan et al.

RSC ADVANCES (2016)

添加到收藏夹

Article Chemistry, Multidisciplinary

Highly Efficient Near-Infrared Delayed Fluorescence Organic Light Emitting Diodes Using a Phenanthrene-Based Charge-Transfer Compound

Shipan Wang et al.

ANGEWANDTE CHEMIE-INTERNATIONAL EDITION (2015)

添加到收藏夹

Article Multidisciplinary Sciences

Highly efficient organic light-emitting diodes from delayed fluorescence

Hiroki Uoyama et al.

NATURE (2012)

添加到收藏夹

Article Materials Science, Multidisciplinary

Energy transfer between organic fluorescent CBP host and blue phosphorescent FIrpic and FIrN4 guests

Taiju Tsuboi et al.

OPTICAL MATERIALS (2007)

添加到收藏夹

© Peeref 2019-2024. All rights reserved.