Boosted Circularly Polarized Luminescence of a Chiral Metallacage Through Co‐Assembly in Confined Microfluidic Environments DOI
Jianjian Zhao, Kai Zeng, Wei‐Tao Dou

et al.

Advanced Functional Materials, Journal Year: 2024, Volume and Issue: 35(3)

Published: Sept. 20, 2024

Abstract Chiral metallacages, with their precisely distributed luminescent and chiral units inherent adaptive chirality, represent an ideal framework for developing circularly polarized luminescence (CPL)‐active materials. Despite potential, enhancing the dissymmetry factor ( g lum ) of metallacage‐based materials remains a significant challenge. In this study, useful approach is proposed by co‐assembling donor metallacage Δ 4 / Λ ‐Zn A achiral acceptor Nile red (NiR), achieving efficient energy chirality transfer resulting in enhanced CPL these co‐assemblies. More importantly, microfluidic laminar flow utilized, known providing stable driving forces confined spaces, to achieve marked improvement values co‐assemblies within polymethyl methacrylate (PMMA) films. Computational fluid dynamics (CFD) simulations small‐angle X‐ray scattering (SAXS) experiments confirm that films containing /NiR, prepared via chips, display well‐defined distributions metallacages NiR due controllable assembly process facilitated flow. This work pioneers new methodology significantly enhance materials, opening avenues field photonics.

Language: Английский

Helically chiral multiresonant thermally activated delayed fluorescent emitters and their use in hyperfluorescent organic light-emitting diodes DOI Creative Commons
Jingxiang Wang, Dongyang Chen, Juan Manuel Moreno-Naranjo

et al.

Chemical Science, Journal Year: 2024, Volume and Issue: 15(41), P. 16917 - 16927

Published: Jan. 1, 2024

Helically chiral MR-TADF compounds tBuPh-BN and DPA-tBuPh-BN show narrowband circularly polarized luminescence that translates into high-performance hyperfluorescent organic light-emitting diodes.

Language: Английский

Citations

5
Dual‐Core and Quenching Resistance of Silicic Linkage‐Based Multiple Resonance Thermally Activated Delayed Fluorescence Emitters DOI Open Access

Hua‐Xiu Ni,

Jiajun Hu,

Jia‐Zhen Zhu

et al.

Advanced Optical Materials, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 17, 2025

Abstract Multiple resonance thermally activated delayed fluorescence (MR‐TADF) materials offer narrowband emission and efficiency but suffer from spectral broadening aggregation‐caused quenching (ACQ) at high doped concentrations. In this study, two novel silicic linkage‐based dual‐core MR‐TADF emitters, DMeSiB DPhSiB, are introduced, which effectively mitigate both concentration broadening. DPhSiB exhibit bluish‐green peaking 493 495 nm with full‐width half‐maximum (FWHM) values of 21 22 in toluene photoluminescence quantum yields exceeding 90% films. At a doping 5 wt%, the organic light‐emitting diodes (OLEDs) based on achieve maximum external efficiencies (EQE max s) 27.2% 28.6% narrow FWHMs 25 24 nm, respectively. Over range wt% to 20 OLEDs maintain EQE 23.5%, 21.4%, 19.2% 24.9%, 22.7%, 19.3%, Even concentration, devices broaden by only 2 or 3 reaching 27 nm. This structural design facilitates efficient luminescence while successfully suppressing ACQ, leading improved device performance.

Language: Английский

Citations

0
Axially chiral biphenoxazine-based multi-resonance thermally activated delayed fluorescence materials for circularly polarized electroluminescence DOI

Minghua Gong,

Xianming Guo,

Yuan Li

et al.

Chemical Engineering Journal, Journal Year: 2025, Volume and Issue: unknown, P. 159719 - 159719

Published: Jan. 1, 2025

Language: Английский

Citations

0
Controlling of Circularly Polarized Luminescence via Modulating the Angle Between Transition Electric and Magnetic Dipole Moments DOI Open Access
Yuan Li,

Dan Mao,

Zhi‐Ping Yan

et al.

Advanced Functional Materials, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 21, 2025

Abstract The most challenging task in the development of chiral luminescent materials is currently increasing dissymmetry factors ( g PL , EL ) circularly polarized luminescence (CPL). Current research primarily focuses on enhancing molecular transition magnetic dipole moment, while angle between electric and moment θ e,m has received comparatively limited attention. In this study, two pairs intrinsically axial fluorescence (CP‐MR‐F) thermally activated delayed (CP‐MR‐TADF) enantiomers R / S ‐BBCz‐BN ‐OBBCz‐BN) with increased by modulating are reported. Based ‐5 H ,5′ ‐6,6′‐bibenzo[ b ]carbazole units, theoretically calculated cal for 17.7° 1.1 × 10 −2 respectively, enabling excellent CPL properties | 5.8 −3 toluene, representing one highest values among MR materials. By employing less conjugated ‐7,7′,8,8′,9,9′,10,10′‐octahydro‐5 groups better electron donating ability, ‐OBBCz‐BN demonstrate good MR‐TADF a peak at 467 nm, full width half‐maximum 27 2.5 . Furthermore, optimized organic light‐emitting diodes based these showcase high maximum external quantum efficiencies 24.7%/33.3% mirror symmetrical electroluminescence 3.4/1.2 respectively.

Language: Английский

Citations

0
Polycyclization decorated organoboron emitters with hetero[8]helicenes electronic structure for highly‐efficient and stable narrowband circularly polarized electroluminescence DOI Creative Commons

C. Y. Li,

Jianping Zhou,

Hengyi Dai

et al.

InfoMat, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 27, 2025

Abstract Multiresonance organoboron helicenes are promising narrowband circularly polarized luminescence (CPL) emitters, which, however, still face formidable challenges to balance a large dissymmetry factor ( g lum ) and high efficiency. Here, two pairs of enantiomers P/M ‐BN[8]H‐ICz ‐BN[8]H‐BO) with the same hetero[8]helicene geometric structures developed through polycyclization decoration. We find that it is helicity helicene electronic rather than geometrical one determines molecular property as larger could enhance electron‐orbital coupling structure. Therefore, ‐BN[8]H‐BO who possesses structure realizes nearly one‐order‐of‐magnitude higher (+2.75/−2.52 × 10 −3 photoluminescence quantum yield (PLQY) 99% compared bearing only hetero[6]helicene distribution +2.41/−2.37 −4 PLQY 95%). Moreover, BN[8]H‐BO exhibits green emission peaking at 538 nm full‐width half‐maxima merely 34 nm, narrower most multiresonance CPL helicenes. The corresponding organic light‐emitting diodes simultaneously realize external efficiency 31.7%, an electroluminescence factors EL +5.23/−5.07 , extremely long LT95 (time 95% initial luminance) over 731 h luminance 1000 cd m – 2 . image

Language: Английский

Citations

0
Recent progress in circularly polarized multi-resonance thermally activated delayed fluorescence materials for organic light-emitting diodes DOI
He Jiang,

Dan Ai,

Jibiao Jin

et al.

Science China Chemistry, Journal Year: 2024, Volume and Issue: unknown

Published: Oct. 23, 2024

Language: Английский

Citations

1
Facile access to spirobifluorene-fused chiral multi-resonance materials with ultra-narrowband blue emission DOI

Hu Cheng,

Chen‐Hao Guo,

Meng Li

et al.

Science Bulletin, Journal Year: 2024, Volume and Issue: 70(4), P. 529 - 535

Published: Dec. 2, 2024

Language: Английский

Citations

1
Circularly Polarized Electroluminescence From Chiral Manganese(II) Complexes DOI Open Access

Zhong‐Zhong Huo,

Yu Wang, Bo Yang

et al.

Advanced Optical Materials, Journal Year: 2024, Volume and Issue: unknown

Published: Dec. 25, 2024

Abstract Due to the circularly polarized luminescence (CPL) and high efficiency, chiral phosphorescent complex holds promise for CP organic light‐emitting diode (CP‐OLED) 3D display, but application of manganese(II) (Mn(II)) is rare. Herein, CP‐OLEDs with Mn(II) enantiomers, R / S ‐DFPO‐MnBr 2 ‐XTDPO‐MnBr , based on tert ‐butyl(6‐(diphenylphosphoryl) dibenzo[ b d ]furan‐4‐yl)(phenyl)phosphine oxide ‐butyl(5‐(diphenylphosphoryl)‐9,9‐dimethyl‐9 H ‐xanthen‐4‐yl)(phenyl) phosphine ligands are reported containing phosphorus‐centered point chirality. exhibit yellow‐green emissions peaking at 541 532 nm photoluminescence quantum yields up 87%, CPL spectra dissymmetry factors (| g PL |) around 2.0 × 10 −3 . The achieve external efficiencies 12.9% electroluminescence | EL values about 1.8 10⁻ 3 suggesting potential complexes.

Language: Английский

Citations

1
Boosted Circularly Polarized Luminescence of a Chiral Metallacage Through Co‐Assembly in Confined Microfluidic Environments DOI
Jianjian Zhao, Kai Zeng, Wei‐Tao Dou

et al.

Advanced Functional Materials, Journal Year: 2024, Volume and Issue: 35(3)

Published: Sept. 20, 2024

Abstract Chiral metallacages, with their precisely distributed luminescent and chiral units inherent adaptive chirality, represent an ideal framework for developing circularly polarized luminescence (CPL)‐active materials. Despite potential, enhancing the dissymmetry factor ( g lum ) of metallacage‐based materials remains a significant challenge. In this study, useful approach is proposed by co‐assembling donor metallacage Δ 4 / Λ ‐Zn A achiral acceptor Nile red (NiR), achieving efficient energy chirality transfer resulting in enhanced CPL these co‐assemblies. More importantly, microfluidic laminar flow utilized, known providing stable driving forces confined spaces, to achieve marked improvement values co‐assemblies within polymethyl methacrylate (PMMA) films. Computational fluid dynamics (CFD) simulations small‐angle X‐ray scattering (SAXS) experiments confirm that films containing /NiR, prepared via chips, display well‐defined distributions metallacages NiR due controllable assembly process facilitated flow. This work pioneers new methodology significantly enhance materials, opening avenues field photonics.

Language: Английский

Citations

0