☆ 4.6 Article

Highly twisted bipolar molecules for efficient near-ultraviolet organic light-emitting diodes via a hybridized local and charge-transfer mechanism

JOURNAL OF MATERIALS CHEMISTRY C (2023)

Related references

Note: Only part of the references are listed.

Article Engineering, Environmental

Molecular engineering by σ-linkers enables delayed fluorescence emitters for high-efficiency sky-blue solution-processed OLEDs

Yanying Chen et al.

Summary: Two novel TADF emitters, Me2AcBO and F2AcBO, were designed and synthesized for highly efficient blue solution-processed OLEDs. They feature a twin structure derived by coupling two individual TADF monomers through non-conjugated linkers, achieving high external quantum efficiency and low efficiency roll-offs for sky-blue OLEDs.

CHEMICAL ENGINEERING JOURNAL (2022)

Add to Collection

Article Engineering, Environmental

Achieving host-free near-ultraviolet electroluminescence via electronic state engineering with phosphine oxide

Shuo Chen et al.

Summary: The development of near-ultraviolet (NUV) emitters with wide band gap and high photoluminescence quantum efficiency (PLQY) for organic light-emitting diode (OLED) applications is a significant challenge. By utilizing crescent phenanthrene (Phen) fused with acceptor imidazole (Im) as NUV chromophore, and introducing steric hindrance for aggregation suppression and triphenylphosphine to enhance electronic states, the designed PhImPOCz and PhImPOtBuCz emitters achieved low turn-on voltages and high external quantum efficiency. This work highlights the importance of electronic state engineering in high-energy OLED applications.

CHEMICAL ENGINEERING JOURNAL (2022)

Add to Collection

Article Nanoscience & Nanotechnology

Why Do We Still Need a Stable Long Lifetime Deep Blue OLED Emitter?

Andrew Monkman

Summary: This paper discusses the demand and potential applications of deep blue organic emitters. It highlights the advantages of the hyperfluorescence scheme based on new multiresonance boron nitrogen molecules, such as DABNA type emitters. The key requirements for suitable sensitizer hosts, especially the photophysical requirements for optimal performance, are also described.

ACS APPLIED MATERIALS & INTERFACES (2022)

Add to Collection

Article Chemistry, Multidisciplinary

High Steric-Hindrance Windmill-Type Molecules for Efficient Ultraviolet to Pure-Blue Organic Light-Emitting Diodes via Hybridized Local and Charge-Transfer Excited-State

Ziting Zhong et al.

Summary: This study proposes a new strategy for high-performance UV-blue emitters based on a high steric-hindrance windmill-type structure. These emitters exhibit good stability and a hybridized local and charge-transfer (HLCT) excited state. Experimental results show that the emission of the emitters can be modulated from UV/deep-blue to pure blue by adjusting the excitation components.

ADVANCED FUNCTIONAL MATERIALS (2022)

Add to Collection

Article Chemistry, Multidisciplinary

Hybridized Local and Charge-Transfer Excited-State Fluorophores through the Regulation of the Donor-Acceptor Torsional Angle for Highly Efficient Organic Light-Emitting Diodes

Xiaojie Chen et al.

Summary: This study reports three D-pi-A-pi-D-type isomers o-2CzBT, m-2CzBT, and p-2CzBT, and confirms their HLCT properties through experimental analysis. p-2CzBT shows higher fluorescent efficiency and achieves higher external quantum efficiency in OLEDs.

CCS CHEMISTRY (2022)

Add to Collection

Article Engineering, Environmental

Highly efficient hybridized local and Charge-transfer (HLCT) Deep-blue electroluminescence with excellent molecular horizontal orientation

Shengbing Xiao et al.

Summary: This study reports two deep-blue emitters (DP, SP) with high photoluminescence quantum yield and good color purity. The horizontal dipole orientation of these emitters is superior to isotropic emitters, especially for SP. This improvement greatly enhances the OLED performance.

CHEMICAL ENGINEERING JOURNAL (2022)

Add to Collection

Article Chemistry, Multidisciplinary

Spiro-configured dibenzosuberene compounds as deep-blue emitters for organic light-emitting diodes with a CIEy of 0.04

Clement Brouillac et al.

Summary: This study focuses on the synthesis and application of deep blue emitters constructed using the DBS molecular fragment in OLEDs. Through a molecular design strategy, emitters with adequate CIE coordinates and a low CIEy were successfully obtained, meeting the standards of NSTC, ITU and EBU.

MATERIALS CHEMISTRY FRONTIERS (2022)

Add to Collection

Article Chemistry, Multidisciplinary

Are pure hydrocarbons the future of host materials for blue phosphorescent organic light-emitting diodes?

Cyril Poriel et al.

Summary: The development of phosphorescent organic light-emitting diodes (PhOLEDs) relies on the molecular design of high-efficiency host materials for red, green, and blue phosphors. By fine tuning the electronic and physical properties of the host materials, high External Quantum Efficiencies (EQEs) can be achieved. Pure hydrocarbon materials show potential for next-generation PhOLEDs.

MATERIALS CHEMISTRY FRONTIERS (2022)

Add to Collection

Article Chemistry, Multidisciplinary

Unraveling the Important Role of High-Lying Triplet-Lowest Excited Singlet Transitions in Achieving Highly Efficient Deep-Blue AIE-Based OLEDs

Xiaomin Guo et al.

Summary: The research focuses on improving the efficiency of triplet excitons in AIE materials through spin conversion process. The relative positions of T-n and S-1 were found to significantly affect the efficiency, leading to the development of a highly efficient deep-blue fluorescent OLED.

ADVANCED MATERIALS (2021)

Add to Collection

Article Engineering, Environmental

π-stacked donor-acceptor molecule to realize hybridized local and charge-transfer excited state emission with multi-stimulus response

Sheng-Yi Yang et al.

Summary: The novel organic material, Spiro-2P-BT-TPA, exhibits multi-stimulus response properties with potential applications in optoelectronics. It shows high photoluminescence quantum yield in a solid matrix, quasi-aggregation-induced emission, mechanochromic, and solvatochromic properties, making it a promising candidate for OLEDs.

CHEMICAL ENGINEERING JOURNAL (2021)

Add to Collection

Article Chemistry, Multidisciplinary

Indolo[3,2,1-jk]carbazole Embedded Multiple-Resonance Fluorophors for Narrowband Deep-blue Electroluminescence with EQE≈34.7 % and CIEy≈0.085

Jinbei Wei et al.

Summary: The strategic implementation of ICz subunits into MR fluorophors has led to the development of deep blue organic emitters with extremely small FWHMs and high photoluminescence quantum yields.

ANGEWANDTE CHEMIE-INTERNATIONAL EDITION (2021)

Add to Collection

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)

Add to Collection

Article Chemistry, Multidisciplinary

Efficiency Breakthrough of Fluorescence OLEDs by the Strategic Management of Hot Excitons at Highly Lying Excitation Triplet Energy Levels

Chengwei Lin et al.

Summary: The study investigates the hot exciton process between high-lying triplet state and lowest excited singlet state in AIE material TPB-PAPC and demonstrates the improvement in efficiency with Forster resonance energy transfer. Doping a blue fluorescent emitter aids in inhibiting losses and achieving high EQE in blue OLEDs, both in AIE and HLCT materials, leading to efficiency breakthroughs in blue fluorescence OLEDs.

ADVANCED FUNCTIONAL MATERIALS (2021)

Add to Collection

Article Chemistry, Multidisciplinary

High-Performance Ultraviolet Organic Light-Emitting Diode Enabled by High-Lying Reverse Intersystem Crossing

Han Zhang et al.

Summary: A high-quality UV emitter with hybridized local and charge-transfer excited state, 2BuCz-CNCz, is reported and applied in UV OLEDs. It features low-lying locally excited emissive state and high-lying reverse intersystem crossing process, balancing color purity and exciton utilization in UV OLED. The OLED based on 2BuCz-CNCz exhibits ideal narrowband UV electroluminescent and record-high maximum external quantum efficiency with small efficiency roll-off.

ANGEWANDTE CHEMIE-INTERNATIONAL EDITION (2021)

Add to Collection

Article Chemistry, Multidisciplinary

Versatile Aggregation-Enhanced Delayed Fluorescence Luminogens Functioning as Emitters and Hosts for High-Performance Organic Light-Emitting Diodes

Jinke Chen et al.

Summary: This study introduces two robust luminogens for high-efficiency OLEDs, showing excellent luminescent characteristics in both undoped and doped devices. These materials exhibit stability and versatility in various OLED applications, promising enhanced efficiency and performance.

CCS CHEMISTRY (2021)

Add to Collection

Article Engineering, Environmental

Highly efficient nondoped blue electroluminescence based on hybridized local and charge-transfer emitter bearing pyrene-imidazole and pyrene

Yulong Liu et al.

Summary: Organic light-emitting diodes (OLEDs) have been widely explored and utilized in flat-panel displays recently for their advantages such as lightweight, high flexibility, and high picture quality, with the potential to become the next-generation display technology. Improving the efficiency of OLEDs, particularly blue OLEDs, is crucial for their application as replacements for liquid crystal display technology. By designing molecules based on a donor-acceptor structure with a hybridized local and charge transfer excited state, efficient OLEDs with high external quantum efficiency can be achieved through effective exciton utilization.

CHEMICAL ENGINEERING JOURNAL (2021)

Add to Collection

Article Materials Science, Multidisciplinary

Bipolar Molecules with Hybridized Local and Charge-Transfer State for Highly Efficient Deep-Blue Organic Light-Emitting Diodes with EQE of 7.4% and CIEy ∼ 0.05

Yu Zheng et al.

Summary: The study demonstrates that excellent deep-blue EL performances with good color purity can be achieved using D-A emitters with highly twisted bridge in HLCT OLEDs.

ADVANCED OPTICAL MATERIALS (2021)

Add to Collection

Article Materials Science, Multidisciplinary

Efficient solution-processed deep-blue CIEy ∈ (0.05) and pure-white CIEx,y ∈ (0.34,0.32) organic light-emitting diodes: experimental and theoretical investigation

Jairam Tagare et al.

Summary: By incorporating a flexible alkyl spacer in the emitters, two bipolar non-conjugated deep-blue emitters, PICFOCz and BICFOCz, were synthesized, demonstrating ultra-deep blue emission and high quantum efficiency. Then, by optimizing the composition of the orange-red emitter, solution-processed OLED devices with pure white emission and high color rendering index (CRI) were achieved.

JOURNAL OF MATERIALS CHEMISTRY C (2021)

Add to Collection

Article Engineering, Electrical & Electronic

Bipolar Arylsilane: Synthesis, Photoelectronic Properties, and High-Performance Deep Blue Organic Light-Emitting Diodes

Yu Zheng et al.

Summary: In this study, two new bipolar arylsilanes were synthesized and characterized, showing high luminescence efficiency in deep blue OLED applications. The crystal structures of the molecules revealed a twisted conformation, and OLEDs using DSiPPI as a dopant exhibited a deep blue luminescence with high external quantum efficiency. This research demonstrated the great potential of the chromophore for deep blue OLED applications.

ACS APPLIED ELECTRONIC MATERIALS (2021)

Add to Collection

Review Chemistry, Multidisciplinary

High Triplet Energy Hosts for Blue Organic Light-Emitting Diodes

Yaxiong Wang et al.

Summary: Improving the performance of blue OLEDs is a challenge in both scientific and industrial communities, with optimizing the fabrication process of devices, developing stable and efficient luminescence and transporting materials, and developing host materials with high triplet energy being key approaches. The bottleneck lies in improving operational lifetimes, decreasing efficiency roll-off, and maintaining high quantum efficiency, and more innovation is needed in this field.

ADVANCED FUNCTIONAL MATERIALS (2021)

Add to Collection

Article Nanoscience & Nanotechnology

Highly Efficient Microcavity Organic Light-Emitting Devices with Narrow-Band Pure UV Emission

Jie Lin et al.

ACS APPLIED MATERIALS & INTERFACES (2020)

Add to Collection

Review Chemistry, Multidisciplinary

Blue Single-Layer Organic Light-Emitting Diodes Using Fluorescent Materials: A Molecular Design View Point

Cyril Poriel et al.

ADVANCED FUNCTIONAL MATERIALS (2020)

Add to Collection

Article Nanoscience & Nanotechnology

Pyrene[4,5-d]imidazole-Based Derivatives with Hybridized Local and Charge-Transfer State for Highly Efficient Blue and White Organic Light-Emitting Diodes with Low Efficiency Roll-Off

Yulong Liu et al.

ACS APPLIED MATERIALS & INTERFACES (2020)

Add to Collection

Article Chemistry, Physical

Spin-Orbit Matrix Elements for a Combined Spin-Flip and IP/EA approach

Oinam Romesh Meitei et al.

JOURNAL OF CHEMICAL THEORY AND COMPUTATION (2020)

Add to Collection

Article Chemistry, Multidisciplinary

Narrowband and Pure Violet Organic Emitter with a Full Width at Half Maximum of 14 nm and gamma Color Coordinate of Below 0.02

Ha Lim Lee et al.

SMALL (2020)

Add to Collection

Article Chemistry, Multidisciplinary

An Ultraviolet Thermally Activated Delayed Fluorescence OLED with Total External Quantum Efficiency over 9%

Yanju Luo et al.

ADVANCED MATERIALS (2020)

Add to Collection

Article Materials Science, Multidisciplinary

Efficient Violet Organic Light-Emitting Diodes with CIEy of 0.02 Based on Spiro Skeleton

Sheng-Nan Zou et al.

ADVANCED OPTICAL MATERIALS (2020)

Add to Collection

Article Materials Science, Multidisciplinary

Efficient near ultraviolet emissive (CIEy < 0.06) organic light-emitting diodes based on phenanthroimidazole-alkyl spacer-carbazole fluorophores: experimental and theoretical investigation

Jairam Tagare et al.

JOURNAL OF MATERIALS CHEMISTRY C (2020)

Add to Collection

Review Materials Science, Multidisciplinary

Progress on ultraviolet organic electroluminescence and lasing

Minyu Chen et al.

JOURNAL OF MATERIALS CHEMISTRY C (2020)

Add to Collection

Article Chemistry, Multidisciplinary

Highly Efficient Thermally Activated Delayed Fluorescence via an Unconjugated Donor-Acceptor System Realizing EQE of Over 30%

Chen-Chen Peng et al.

ADVANCED MATERIALS (2020)

Add to Collection

Article Chemistry, Multidisciplinary

Evolution of pure hydrocarbon hosts: simpler structure, higher performance and universal application in RGB phosphorescent organic light-emitting diodes

Qiang Wang et al.

CHEMICAL SCIENCE (2020)

Add to Collection

Article Chemistry, Multidisciplinary

Highly efficient non-doped blue fluorescent OLEDs with low efficiency roll-off based on hybridized local and charge transfer excited state emitters

Xianhao Lv et al.

CHEMICAL SCIENCE (2020)

Add to Collection

Article Materials Science, Multidisciplinary

Nondoped organic light-emitting diodes with low efficiency roll-off: the combination of aggregation-induced emission, hybridized local and charge-transfer state as well as high photoluminescence efficiency

Sheng-Yi Yang et al.

JOURNAL OF MATERIALS CHEMISTRY C (2020)

Add to Collection

Article Chemistry, Multidisciplinary

Fine Tuning of the Electronic Properties of Novel BTPE Using Oligosilanyl Linkages and Their Application in Rapid High-Resolution Visualization of Latent Fingerprints

Xiaoshuang Xiang et al.

CCS CHEMISTRY (2020)

Add to Collection

Article Spectroscopy

Strategy for tuning the up-conversion intersystem crossing rates in a series of organic light-emitting diodes emitters relevant for thermally activated delayed fluorescence

Qiuling Zhu et al.

SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY (2019)

Add to Collection

Article Chemistry, Multidisciplinary

Highly Efficient Blue Fluorescent OLEDs Based on Upper Level Triplet-Singlet Intersystem Crossing

Yuwei Xu et al.

ADVANCED MATERIALS (2019)

Add to Collection

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)

Add to Collection

Article Materials Science, Multidisciplinary

Novel 9,9-dimethylfluorene-bridged D-π-A-type fluorophores with a hybridized local and charge-transfer excited state for deep-blue electroluminescence with CIEy ∼ 0.05

Xu Qiu et al.

JOURNAL OF MATERIALS CHEMISTRY C (2019)

Add to Collection

Article Materials Science, Multidisciplinary

Synergistic tuning of the optical and electrical performance of AIEgens with a hybridized local and charge-transfer excited state

Han Zhang et al.

JOURNAL OF MATERIALS CHEMISTRY C (2019)

Add to Collection

Article Chemistry, Physical

Deep-Blue High-Efficiency TTA OLED Using Para- and Meta-Conjugated Cyanotriphenylbenzene and Carbazole Derivatives as Emitter and Host

Nadzeya A. Kukhta et al.

JOURNAL OF PHYSICAL CHEMISTRY LETTERS (2017)

Add to Collection

Article Materials Science, Multidisciplinary

Highly Efficient Nondoped Near-Ultraviolet Electroluminescence with an External Quantum Efficiency Greater Than 6.5% Based on a Carbazole-Triazole Hybrid Molecule with High and Balanced Charge Mobility

Shanfeng Xue et al.

ADVANCED OPTICAL MATERIALS (2017)

Add to Collection

Article Nanoscience & Nanotechnology

Novel Hot Exciton Blue Fluorophores for High Performance Fluorescent/Phosphorescent Hybrid White Organic Light-Emitting Diodes with Superhigh Phosphorescent Dopant Concentration and Improved Efficiency Roll-Off

Xinhua Ouyang et al.

ACS APPLIED MATERIALS & INTERFACES (2015)

Add to Collection

Article Chemistry, Multidisciplinary

Highly Efficient Thermally Activated Delayed Fluorescence Emitters with a Small Singlet-Triplet Energy Gap and Large Oscillator Strength

Yuta Sagara et al.

CHEMISTRY LETTERS (2015)

Add to Collection

Article Materials Science, Multidisciplinary

Efficient violet non-doped organic light-emitting device based on a pyrene derivative with novel molecular structure

Zhi-Qiang Wang et al.

ORGANIC ELECTRONICS (2015)

Add to Collection

Article Chemistry, Multidisciplinary

Highly efficient near ultraviolet organic light-emitting diode based on a meta-linked donor-acceptor molecule

Haichao Liu et al.

CHEMICAL SCIENCE (2015)

Add to Collection

Article Chemistry, Physical

Highly efficient blue electroluminescence based on thermally activated delayed fluorescence

Shuzo Hirata et al.

NATURE MATERIALS (2015)

Add to Collection

Article Chemistry, Multidisciplinary

Luminous Butterflies: Efficient Exciton Harvesting by Benzophenone Derivatives for Full-Color Delayed Fluorescence OLEDs

Sae Youn Lee et al.

ANGEWANDTE CHEMIE-INTERNATIONAL EDITION (2014)

Add to Collection

Article Materials Science, Multidisciplinary

High Yields of Singlet Excitons in Organic Electroluminescence through Two Paths of Cold and Hot Excitons

Yuyu Pan et al.

ADVANCED OPTICAL MATERIALS (2014)

Add to Collection

Article Materials Science, Multidisciplinary

A Hybridized Local and Charge-Transfer Excited State for Highly Efficient Fluorescent OLEDs: Molecular Design, Spectral Character, and Full Exciton Utilization

Weijun Li et al.

ADVANCED OPTICAL MATERIALS (2014)

Add to Collection

Article Materials Science, Multidisciplinary

Novel violet emitting material synthesized by stepwise chemical reactions

Xiangyang Tang et al.

JOURNAL OF MATERIALS CHEMISTRY C (2014)

Add to Collection

Article Materials Science, Multidisciplinary

Ultraviolet-violet electroluminescence from highly fluorescent purines

Yixing Yang et al.

JOURNAL OF MATERIALS CHEMISTRY C (2013)

Add to Collection

Article Chemistry, Multidisciplinary

A Twisting Donor-Acceptor Molecule with an Intercrossed Excited State for Highly Efficient, Deep-Blue Electroluminescence

Weijun Li et al.

ADVANCED FUNCTIONAL MATERIALS (2012)

Add to Collection

Article Chemistry, Physical

High Efficiency Nondoped Deep-Blue Organic Light Emitting Devices Based on Imidazole-π-triphenylamine Derivatives

Ying Zhang et al.

CHEMISTRY OF MATERIALS (2012)

Add to Collection

Article Chemistry, Multidisciplinary

Design of Efficient Thermally Activated Delayed Fluorescence Materials for Pure Blue Organic Light Emitting Diodes

Qisheng Zhang et al.

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY (2012)

Add to Collection

Article Multidisciplinary Sciences

Highly efficient organic light-emitting diodes from delayed fluorescence

Hiroki Uoyama et al.

NATURE (2012)

Add to Collection

Article Chemistry, Physical

Bipolar anthracene derivatives containing hole- and electron-transporting moieties for highly efficient blue electroluminescence devices

Jinhai Huang et al.

JOURNAL OF MATERIALS CHEMISTRY (2011)

Add to Collection

Article Physics, Applied

Organic light-emitting devices (OLEDs) and OLED-based chemical and biological sensors: an overview

Joseph Shinar et al.

JOURNAL OF PHYSICS D-APPLIED PHYSICS (2008)

Add to Collection

Article Chemistry, Multidisciplinary

Highly efficient UV organic light-emitting devices based on bi(9,9-diarylfluorene)s

TC Chao et al.

ADVANCED MATERIALS (2005)

Add to Collection

Article Chemistry, Physical

Natural transition orbitals

RL Martin

JOURNAL OF CHEMICAL PHYSICS (2003)

Add to Collection

Article Physics, Applied

Deep-UV liquid immersion mastering of high density optical discs

H van Santen et al.

JAPANESE JOURNAL OF APPLIED PHYSICS PART 1-REGULAR PAPERS BRIEF COMMUNICATIONS & REVIEW PAPERS (2003)

Add to Collection

© Peeref 2019-2024. All rights reserved.