Azepination‐Induced Frontier Molecular Orbital Delocalization of Multiple Resonance Emitters: Constructing Highly Efficient Narrowband Electroluminescent Materials DOI
Tingting Huang, Yincai Xu,

Yupei Qu

et al.

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

Published: April 3, 2025

Developing diversified construction strategies for high-color-purity and efficient multiple resonance thermally activated delayed fluorescence (MR-TADF) materials is a major strategic demand to meet the requirements of ultra-high-definition organic light-emitting diode (OLED) displays, posing significant challenge design synthesis emitters at molecular level. Herein, strategy proposed azepination-induced frontier orbital (FMO) delocalization MR emitters, that is, embedding azepine into prototype molecule BNCz can effectively improve π-conjugation degree extend FMO delocalization, thereby constructing series long-wavelength MR-TADF with narrowband emission. Through an intramolecular Scholl reaction, these target molecules azepine-embedded core are afforded by one-fold heptagonal cyclization phenyl ring attached (aromatic amine-substituted) aryl precursor. They all exhibit green emission around 520 nm narrow full-widths half-maximum (FWHMs) ≤ 37 in toluene. OLEDs employing show excellent electroluminescence (EL) performances, among which m-PAz-BNCz-based OLED exhibits optimal EL performances peak 528 nm, FWHM Commission Internationale de L'Eclairage (CIE) coordinates (0.26, 0.70), maximum external quantum efficiency (EQE) 36.2%.

Language: Английский

Single‐Molecule White Circularly Polarized Photoluminescence and Electroluminescence from Dual‐Emission Enantiomers DOI
Pei Zhao, Wei‐Chen Guo, Meng Li

et al.

Angewandte Chemie International Edition, Journal Year: 2024, Volume and Issue: 63(36)

Published: June 20, 2024

The strategy of integrating conformational isomerization donors and chiral acceptors in a single molecule was proposed to construct white circularly polarized luminescence (WCPL) materials this work. Consequently, pair dual-emission enantiomers, namely (R/S)-DO-PTZ, were designed synthesized, which displayed emission with blue yellow bands solution solid films Commission Internationale de l'Eclairage (CIE) coordinates (0.30, 0.33) (0.33, 0.35), respectively. Meanwhile, (R/S)-DO-PTZ exhibited high PLQY up 67 % doped clear mirror-image WCPL signals |g

Language: Английский

Citations

12
Chiral Co‐Assembly with Narrowband Multi‐Resonance Characteristics for High‐Performance Circularly Polarized Organic Light‐Emitting Diodes DOI

Chen‐Hao Guo,

Yuewei Zhang, Wenlong Zhao

et al.

Advanced Materials, Journal Year: 2024, Volume and Issue: 36(38)

Published: July 25, 2024

A promising kind of ternary chiral co-assemblies with high PLQY, large dissymmetry factor (g

Language: Английский

Citations

11
Near‐Infrared Circularly Polarized Electroluminescence with Switchable Handedness in Organic LEDs DOI Creative Commons
Francesco Zinna, Chiara Botta, S. Luzzati

et al.

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

Published: Jan. 28, 2025

Abstract In this study, the development of first fully‐organic circularly polarized near‐infrared organic light–emitting diode (CP‐NIR‐OLED) is presented. The devices are made by using a co‐assembled active layer consisting commercially available NIR‐emitting indacenodithienothiophene‐based molecule (ITIC) and chiral inducer. Here, ITIC, which traditionally utilized as non‐fullerene acceptor in photovoltaics for its superior characteristics, demonstrated to act an effective NIR emitter solution‐processed OLEDs. By incorporating additive into layer, emission successfully polarized, achieving CP‐NIR‐OLEDs with dissymmetry values up 0.074 maximum radiance 1.65 Wsr −1 m −2 . Additionally, study shows that manipulating position radiative exciton recombination zone within circular polarization sign can be switched, while maintaining even enhancing device performance. This also exhibit remarkable operational stability, indicating their potential short‐term applications. work provides significant step forward CP‐OLEDs opens new avenues use advanced optoelectronic devices.

Language: Английский

Citations

1
Multiple-resonance thermally activated delayed fluorescence materials based on phosphorus central chirality for efficient circularly polarized electroluminescence DOI
Yu Wang,

Zi-Yi Lv,

Zixuan Chen

et al.

Materials Horizons, Journal Year: 2024, Volume and Issue: 11(19), P. 4722 - 4729

Published: Jan. 1, 2024

Circularly polarized organic light-emitting diodes (CP-OLEDs) hold great potential for naked-eye 3D displays, necessitating efficient chiral luminescent materials with an optimal CP luminescence (CPL) dissymmetry factor (

Language: Английский

Citations

7
Self‐Assembled Chiral Polymers Exhibiting Amplified Circularly Polarized Electroluminescence DOI

Ke‐Ke Tan,

Wei‐Chen Guo, Wenlong Zhao

et al.

Angewandte Chemie International Edition, Journal Year: 2024, Volume and Issue: unknown

Published: July 16, 2024

Circularly polarized electroluminescence (CPEL) is highly promising in realm of 3D display and optical data storage. However, designing a groundbreaking chiral material with high comprehensive CPEL performance remains formidable challenge. In this work, pair polymers self-assembled behavior designed by integrating BN-moiety into polyfluorene backbone, named R-PBN S-PBN, respectively. The show narrowband emission centered at 490 nm full-width half maximum (FWHM) 29 photoluminescence quantum yield (PLQY) 79 %. After thermal annealing treatment, the undergo self-assembly, exhibiting amplified circularly luminescence (CPL) asymmetry factor (|g

Language: Английский

Citations

5
Efficient circularly polarized multiple resonance thermally activated delayed fluorescence from B,N-embedded hetero[8]helicene enantiomers DOI Creative Commons
Tingting Huang, Yuan Li, Xueying Lu

et al.

Chemical Science, Journal Year: 2024, Volume and Issue: 15(37), P. 15170 - 15177

Published: Jan. 1, 2024

A pair of CP-MR-TADF enantiomers with high-order B,N-embedded hetero[8]helicene, ( P / M )-BN-TP-ICz, was constructed. CP-OLEDs exhibit narrow green emission peaking at 540 nm maximum EQEs 32.0% and g EL s approximately 7.70 × 10 −4 .

Language: Английский

Citations

5
Ultra-Narrowband Circularly Polarized Luminescence from Multiple 1,4-Azaborine-Embedded Helical Nanographenes DOI
Fangyuan Zhang,

Vincenzo Brancaccio,

Fridolin Saal

et al.

Journal of the American Chemical Society, Journal Year: 2024, Volume and Issue: 146(43), P. 29782 - 29791

Published: Oct. 22, 2024

In this manuscript we present a strategy to achieve ultranarrowband circularly polarized luminescence (CPL) from multiple 1,4-azaborine-embedded helical nanographenes. The impact of number and position boron nitrogen atoms in the rigid core molecule on optical properties─including absorption emission maxima, photoluminescence quantum yield, Stokes shift, excited singlet–triplet energy gap full width at half-maximum (fwhm) for CPL fluorescence─was investigated. molecules reported here exhibits fluorescence (fwhm 16–17.5 nm toluene) 18–19 toluene). To best our knowledge, is among narrowest any organic date. Quantum chemical calculations, including computed spectra involving vibronic contributions, provide valuable insights future molecular design aimed achieving narrowband CPL.

Language: Английский

Citations

5
[(2-Dimesitylboryl)phenyl]ethynyl-Substituted [2.2]Paracyclophane Exhibiting Circularly Polarized Luminescence in Both Solution and Solid-State DOI Creative Commons

Lianfeng Guo,

Mengyuan Zhang, Cui‐Hua Zhao

et al.

Molecules, Journal Year: 2025, Volume and Issue: 30(2), P. 390 - 390

Published: Jan. 18, 2025

Developing a new type of circularly polarized luminescent active small organic molecule that combines high fluorescence quantum yield and luminescence dissymmetric factor in both solution solid state is highly challenging but promising. In this context, we designed synthesized unique triarylborane-based [2.2]paracyclophane derivative, m-BPhANPh2-Cp, which an electron-accepting [(2-dimesitylboryl)phenyl]ethynyl group electron-donating N,N-diphenylamino are introduced into two different benzene rings [2.2]paracyclophane. Owing to the electronic effect these substituents, compound can display charge-transfer emission with large Stokes shifts (∆υ = 4.23 − 8.20 × 103 cm−1) fair yields (ΦF 0.15 0.37) solutions. addition, emit strong blue even much higher than up 0.64 powder spin-coated film). Moreover, enantiomeric forms m-BPhANPh2-Cp show CPL signals dilute |glum|s 9.6 10−3 5.4 10−3, respectively. Thus, it possible achieve tunable from yellow BCPLs ranging 56.7 26.6 M−1 cm−1 intense combing ΦF |glum| state.

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
Qcforever2: Advanced Automation of Quantum Chemistry Computations DOI Open Access
Masato Sumita, Kei Terayama, Shoichi Ishida

et al.

Journal of Computational Chemistry, Journal Year: 2025, Volume and Issue: 46(3)

Published: Jan. 25, 2025

ABSTRACT QCforever is a wrapper designed to automatically and simultaneously calculate various physical quantities using quantum chemical (QC) calculation software for blackbox optimization in space. We have updated it QCforever2 search the conformation optimize density functional parameters more accurate reliable evaluation of an input molecule. In optimization, can work as compactly arranged surrogate models costly experiments. future QC calculations would be good companion laboratories, providing exploitation

Language: Английский

Citations

0