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  1. Article ; Online: Narrowband Fluorescent Emitters Based on BN-Doped Polycyclic Aromatic Hydrocarbons for Efficient and Stable Organic Light-Emitting Diodes.

    Hu, Yuxuan / Huang, Manli / Liu, He / Miao, Jingsheng / Yang, Chuluo

    Angewandte Chemie (International ed. in English)

    2023  Volume 62, Issue 46, Page(s) e202312666

    Abstract: Organic light-emitting diodes (OLEDs) using conventional fluorescent emitters are currently attracting considerable interests due to outstanding stability and abundant raw materials. To construct high-performance narrowband fluorophores to satisfy ... ...

    Abstract Organic light-emitting diodes (OLEDs) using conventional fluorescent emitters are currently attracting considerable interests due to outstanding stability and abundant raw materials. To construct high-performance narrowband fluorophores to satisfy requirements of ultra-high-definition displays, a strategy fusing multi-resonance BN-doped moieties to naphthalene is proposed to construct two novel narrowband fluorophores. Green Na-sBN and red Na-dBN, manifest narrow full-width at half-maxima of 31 nm, near-unity photoluminescence quantum yields and molecular horizontal dipole ratios above 90 %. Their OLEDs exhibit the state-of-the-art performances including high external quantum efficiencies (EQE), ultra-low efficiency roll-off and long operational lifetimes. The Na-sBN-based device achieves EQE as high as 28.8 % and remains 19.8 % even at luminance of 100,000 cd m
    Language English
    Publishing date 2023-10-13
    Publishing country Germany
    Document type Journal Article
    ZDB-ID 2011836-3
    ISSN 1521-3773 ; 1433-7851
    ISSN (online) 1521-3773
    ISSN 1433-7851
    DOI 10.1002/anie.202312666
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  2. Article ; Online: Naphthalene-Embedded Multi-Resonance Emitters Enabling Efficient Narrow Emissive Blue OLEDs.

    Hou, Peijie / Xu, Yulin / Miao, Jingsheng / Zhu, Minrong / Liu, He

    Chemistry (Weinheim an der Bergstrasse, Germany)

    2023  Volume 29, Issue 61, Page(s) e202301931

    Abstract: Great achievements have been made in the development of organic light-emitting diodes in recent decades. However, achieving high color purity for blue emitters remains a challenge. In this study, we have designed and synthesized three naphthalene (NA)- ... ...

    Abstract Great achievements have been made in the development of organic light-emitting diodes in recent decades. However, achieving high color purity for blue emitters remains a challenge. In this study, we have designed and synthesized three naphthalene (NA)-embedded multi-resonance (MR) emitters, named SNA, SNB and SNB1, based on N-B-O frameworks with isomer variations for finely adjusting the photophysical properties. These emitters show tunable blue emission with emission peaks of 450-470 nm. Small full width of half maximum (FWHM) of 25-29 nm are achieved in these emitters, indicating the well maintaining of molecular rigidity and MR effect with NA extension. Such design also ensures a fast radiative decay. However, no obvious delayed fluorescence is observed in all three emitters due to the relatively large energy differences between the first singlet and triplet excited states. Both SNA and SNB enable high electroluminescent (EL) performance in doped devices with external quantum efficiency (EQE) of 7.2 and 7.9 %, respectively. When applying the sensitized strategy, devices based on SNA and SNB show huge improvement with EQE of 29.3 and 29.1 %. More importantly, SNB with twist geometry enables stable EL spectra with almost unchanged FWHM under different doping concentrations. This work demonstrates the potential of NA extension design in constructing narrowband emissive blue emitters.
    Language English
    Publishing date 2023-09-28
    Publishing country Germany
    Document type Journal Article
    ZDB-ID 1478547-X
    ISSN 1521-3765 ; 0947-6539
    ISSN (online) 1521-3765
    ISSN 0947-6539
    DOI 10.1002/chem.202301931
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  3. Article ; Online: High Performance Near-Infrared Emitters with Methylated Triphenylamine and Thiadiazolo[3,4-g]quinoxaline-Based Fluorophores.

    Zhang, Youming / Wu, Chengjun / Zhu, Minrong / Miao, Jingsheng

    Molecules (Basel, Switzerland)

    2021  Volume 26, Issue 21

    Abstract: Three near-infrared emitters ( ...

    Abstract Three near-infrared emitters (
    Language English
    Publishing date 2021-10-22
    Publishing country Switzerland
    Document type Journal Article
    ZDB-ID 1413402-0
    ISSN 1420-3049 ; 1431-5165 ; 1420-3049
    ISSN (online) 1420-3049
    ISSN 1431-5165 ; 1420-3049
    DOI 10.3390/molecules26216386
    Database MEDical Literature Analysis and Retrieval System OnLINE

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    In stock of ZB MED Cologne/Königswinter

    Zs.MO 81: Show issues

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  4. Article: Simultaneously enhancing the planarity and electron-donating capability of donors for through-space charge transfer TADF towards deep-red emission.

    Song, Xiu-Fang / Jiang, Chenglin / Li, Nengquan / Miao, Jingsheng / Li, Kai / Yang, Chuluo

    Chemical science

    2023  Volume 14, Issue 43, Page(s) 12246–12254

    Abstract: Through-space charge transfer (TSCT) has been proven effective for designing thermally activated delayed fluorescence (TADF) emitters due to the separation of the frontier molecular orbitals. Although tuning of the interaction between the donor and ... ...

    Abstract Through-space charge transfer (TSCT) has been proven effective for designing thermally activated delayed fluorescence (TADF) emitters due to the separation of the frontier molecular orbitals. Although tuning of the interaction between the donor and acceptor by controlling the conformation is known to be crucial for the photophysical properties of TSCT excited states, it remains a challenge to realize efficient red and deep-red emissions. Herein, we designed two TSCT molecules, namely TPXZ-QX and TPXZ-2QX, by using oxygen-bridged triphenylamine (TPXZ) as the electron donor with enhanced planarity and electron-donating capability. With a face-to-face orientation of the donor and acceptor segments and close π-π contacts, the new emitters have strong intramolecular noncovalent donor-acceptor interactions. The emissions of TPXZ-QX and TPXZ-2QX in doped thin films lie in the red (
    Language English
    Publishing date 2023-10-16
    Publishing country England
    Document type Journal Article
    ZDB-ID 2559110-1
    ISSN 2041-6539 ; 2041-6520
    ISSN (online) 2041-6539
    ISSN 2041-6520
    DOI 10.1039/d3sc04264b
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  5. Article ; Online: Multi-spiro junctions enable efficient thermally activated delayed fluorescent emitter.

    Liu, Yang / Xu, Yulin / Peng, Hao / Miao, Jingsheng / Liu, He / Yang, Chuluo

    Chemical communications (Cambridge, England)

    2023  Volume 59, Issue 60, Page(s) 9255–9258

    Abstract: A new acridine donor with trispiro junctions is developed for assembling a highly efficient thermally activated delayed fluorescence emitter. The multispiro junctions ensure a rigid geometry that leads to a well-suppressed nonradiative decay. The ... ...

    Abstract A new acridine donor with trispiro junctions is developed for assembling a highly efficient thermally activated delayed fluorescence emitter. The multispiro junctions ensure a rigid geometry that leads to a well-suppressed nonradiative decay. The resulting electroluminescent devices achieve a high external quantum efficiency of 34.2%.
    Language English
    Publishing date 2023-07-25
    Publishing country England
    Document type Journal Article
    ZDB-ID 1472881-3
    ISSN 1364-548X ; 1359-7345 ; 0009-241X
    ISSN (online) 1364-548X
    ISSN 1359-7345 ; 0009-241X
    DOI 10.1039/d3cc02347h
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  6. Article: Dynamic bond interactions fine-tune the properties of multiple resonance emitters towards highly efficient narrowband green OLEDs.

    Zou, Yang / Yu, Mingxin / Miao, Jingsheng / Huang, Taian / Liao, Shuokun / Cao, Xiaosong / Yang, Chuluo

    Chemical science

    2023  Volume 14, Issue 12, Page(s) 3326–3331

    Abstract: Multiple resonance (MR) molecules based on a B/N polycyclic aromatic framework are the cutting-edge materials in the field of organic light-emitting diodes (OLEDs) owing to their superb photophysical properties. Tailoring the MR molecular framework with ... ...

    Abstract Multiple resonance (MR) molecules based on a B/N polycyclic aromatic framework are the cutting-edge materials in the field of organic light-emitting diodes (OLEDs) owing to their superb photophysical properties. Tailoring the MR molecular framework with various functional groups toward ideal properties has become an emerging topic in the field of materials chemistry. Dynamic bond interactions are versatile and powerful tools in regulating the properties of materials. Herein, the pyridine moiety, which presents high affinity to form dynamic bond interactions such as hydrogen bonds and N→B dative bonds, was introduced into the MR framework for the first time, and the designed emitters are synthesized in a feasible way. The introduction of the pyridine moiety not only maintained the conventional MR properties of the emitters, but also endowed the emitters with tunable emission spectra, narrowed emission, enhanced photoluminescence quantum yield (PLQY), and intriguing supramolecular assembly in the solid state. Thanks to the overall superior properties brought by the hydrogen-bond promoted molecular rigidity, green OLEDs based on the emitter exhibit excellent device performance with external quantum efficiency (EQE) up to 38% and a small FWHM of 26 nm, together with good roll-off performance.
    Language English
    Publishing date 2023-02-28
    Publishing country England
    Document type Journal Article
    ZDB-ID 2559110-1
    ISSN 2041-6539 ; 2041-6520
    ISSN (online) 2041-6539
    ISSN 2041-6520
    DOI 10.1039/d3sc00246b
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  7. Article ; Online: Integration of fine-tuned chiral donor with hybrid long/short-range charge-transfer for high-performance circularly polarized electroluminescence.

    Yin, Xiaojun / Huang, Haoxin / Li, Nengquan / Li, Wendi / Mo, Xuechao / Huang, Manli / Chen, Guohao / Miao, Jingsheng / Yang, Chuluo

    Materials horizons

    2024  Volume 11, Issue 7, Page(s) 1752–1759

    Abstract: The synergistic integration of a fine-tuned chiral donor with a hybrid long/short-range charge-transfer mechanism offers an accessible pathway to construct highly efficient circularly polarized emitters. Consequently, a notable dissymmetry factor of 1.6 × ...

    Abstract The synergistic integration of a fine-tuned chiral donor with a hybrid long/short-range charge-transfer mechanism offers an accessible pathway to construct highly efficient circularly polarized emitters. Consequently, a notable dissymmetry factor of 1.6 × 10
    Language English
    Publishing date 2024-04-02
    Publishing country England
    Document type Journal Article
    ZDB-ID 2744250-0
    ISSN 2051-6355 ; 2051-6347
    ISSN (online) 2051-6355
    ISSN 2051-6347
    DOI 10.1039/d3mh02146g
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  8. Article ; Online: Discrete Mononuclear Platinum(II) Complexes Realize High-Performance Red Phosphorescent OLEDs with EQEs of up to 31.8% and Superb Device Stability.

    Wang, Lian / Miao, Jingsheng / Zhang, Youming / Wu, Chengjun / Huang, Hong / Wang, Xinzhong / Yang, Chuluo

    Advanced materials (Deerfield Beach, Fla.)

    2023  Volume 35, Issue 32, Page(s) e2303066

    Abstract: Designing mononuclear platinum(II) complexes that do not rely on intermolecular aggregation for high-performance red organic light-emitting diodes remains a formidable challenge. In this work, three robust red-emitting Pt(II) complexes are created by ... ...

    Abstract Designing mononuclear platinum(II) complexes that do not rely on intermolecular aggregation for high-performance red organic light-emitting diodes remains a formidable challenge. In this work, three robust red-emitting Pt(II) complexes are created by utilizing a rigid 4-coordination configuration, where the ligands are formed by linking electron-donor of triphenylamine (TPA) moieties with electron-acceptor of pyridine, isoquinoline, and/or δ-carboline units. The thermal stability, electrochemical, and photophysical properties of the complexes are thoroughly examined. The complexes display efficient red phosphorescence, with high photoluminescence quantum yields and short excited lifetimes. The OLEDs dope with these complexes exhibit high maximum external quantum efficiencies (EQEs) of up to 31.8% with minimal efficiency roll-off even at high brightness. Significantly, the devices demonstrate exceptional long operational lifetime, with a T
    Language English
    Publishing date 2023-06-30
    Publishing country Germany
    Document type Journal Article
    ZDB-ID 1474949-X
    ISSN 1521-4095 ; 0935-9648
    ISSN (online) 1521-4095
    ISSN 0935-9648
    DOI 10.1002/adma.202303066
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  9. Article ; Online: Narrowband Near-Infrared Multiple-Resonance Thermally Activated Delayed Fluorescence Emitters towards High-Performance and Stable Organic Light-Emitting Diodes.

    Hua, Tao / Li, Nengquan / Huang, Zhongyan / Zhang, Youming / Wang, Lian / Chen, Zhanxiang / Miao, Jingsheng / Cao, Xiaosong / Wang, Xinzhong / Yang, Chuluo

    Angewandte Chemie (International ed. in English)

    2024  Volume 63, Issue 7, Page(s) e202318433

    Abstract: Multiple-resonance thermally activated delayed fluorescence (MR-TADF) materials are highly coveted for their high efficiency and narrowband emission in organic light-emitting diodes (OLEDs). Nevertheless, the development of near-infrared (NIR) MR-TADF ... ...

    Abstract Multiple-resonance thermally activated delayed fluorescence (MR-TADF) materials are highly coveted for their high efficiency and narrowband emission in organic light-emitting diodes (OLEDs). Nevertheless, the development of near-infrared (NIR) MR-TADF emitters remains a formidable challenge. In this study, we design two new NIR MR-TADF emitters, PXZ-R-BN and BCz-R-BN, by embedding 10H-phenoxazine (PXZ) and 7H-dibenzo[c,g]carbazole (BCz) fragments to increase the electron-donating ability or extending π-conjugation on the framework of para-boron fusing polycyclic aromatic hydrocarbons (PAHs). Both compounds emit in the NIR region, with a full-width at half-maximum (FWHM) of 49 nm (0.13 eV) for PXZ-R-BN and 43 nm (0.11 eV) for BCz-R-BN in toluene. To sensitize the two NIR MR-TADF emitters in OLEDs, a new platinum complex, Pt-1, is designed as a sensitizer. The PXZ-R-BN-based sensitized OLEDs achieve a maximum external quantum efficiency (EQE
    Language English
    Publishing date 2024-01-11
    Publishing country Germany
    Document type Journal Article
    ZDB-ID 2011836-3
    ISSN 1521-3773 ; 1433-7851
    ISSN (online) 1521-3773
    ISSN 1433-7851
    DOI 10.1002/anie.202318433
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  10. Article ; Online: Orienting Group Directed Cascade Borylation for Efficient One-Shot Synthesis of 1,4-BN-Doped Polycyclic Aromatic Hydrocarbons as Narrowband Organic Emitters.

    Wu, Lin / Huang, Zhongyan / Miao, Jingsheng / Wang, Shuni / Li, Xinyao / Li, Nengquan / Cao, Xiaosong / Yang, Chuluo

    Angewandte Chemie (International ed. in English)

    2024  Volume 63, Issue 18, Page(s) e202402020

    Abstract: 1,4-BN-doped polycyclic aromatic hydrocarbons (PAHs) have emerged as very promising emitters in organic light-emitting diodes (OLEDs) due to their narrowband emission spectra that may find application in high-definition displays. While considerable ... ...

    Abstract 1,4-BN-doped polycyclic aromatic hydrocarbons (PAHs) have emerged as very promising emitters in organic light-emitting diodes (OLEDs) due to their narrowband emission spectra that may find application in high-definition displays. While considerable research has focused on investigating the properties of these materials, less attention has been placed on their synthetic methodology. Here we developed an efficient synthetic method for 1,4-BN-doped PAHs, which enables sustainable production of narrowband organic emitting materials. By strategically introducing substituents, such as methyl, tert-butyl, phenyl, and chloride, at the C5 position of the 1,3-benzenediamine substrates, we achieved remarkable regioselective borylation in the para-position of the substituted moiety. This approach facilitated the synthesis of a diverse range of 1,4-BN-doped PAHs emitters with good yields and exceptional regioselectivity. The synthetic method demonstrated excellent scalability for large-scale production and enabled late-stage transformation of the borylated products. Mechanistic investigations provided valuable insights into the pivotal roles of electron effect and steric hindrance effect in achieving highly efficient regioselective borylation. Moreover, the outstanding device performance of the synthesized compounds 10 b and 6 z, underscores the practicality and significance of the developed method.
    Language English
    Publishing date 2024-03-12
    Publishing country Germany
    Document type Journal Article
    ZDB-ID 2011836-3
    ISSN 1521-3773 ; 1433-7851
    ISSN (online) 1521-3773
    ISSN 1433-7851
    DOI 10.1002/anie.202402020
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