Blue Multiresonance Thermally Activated Delayed Fluorescence Conjugated Polymers for Solution-Processable Narrowband Blue Organic Light-Emitting Diodes with High Color-Purity DOI
Tao Wang, Shuni Wang,

Junjie Dong

et al.

Macromolecules, Journal Year: 2024, Volume and Issue: unknown

Published: Dec. 28, 2024

Thermally activated delayed fluorescence (TADF) conjugated polymers generally exhibit red-shifted photoluminescence (PL) spectra compared to their TADF chromophores, owing the extension of conjugation along polymeric backbone. Developing blue TADF-conjugated polymers, particularly those with high color purity, continue pose a significant challenge. Herein, we design and synthesize batch multiresonance (MR)-TADF-conjugated by grafting an MR-emitting moiety as pendant onto backbone through unilateral para-carbon position nitrogen atom within MR moiety. These new emissions PL emission peaks ranging from 459 477 nm, accompanied full width at half-maximum (FWHM) values between 24 27 nm. Their electroluminescent devices via solution-processing demonstrate pure EQEmax 10.1%, Commission Internationale de I'Eclairage (CIE) coordinates (0.14, 0.12) FWHM 31 peaking 462 which best performance among polymer-based organic light-emitting diodes CIEy below 0.15.

Language: Английский

Single-molecule resolution of macromolecules with nanopore devices DOI

Meili Ren,

Daixin Liu,

Fupeng Qin

et al.

Advances in Colloid and Interface Science, Journal Year: 2025, Volume and Issue: unknown, P. 103417 - 103417

Published: Jan. 1, 2025

Language: Английский

Citations

0
Near Infrared Absorption/Emission of B ← N Embedded Polymers with Aromatic Substituents: A Judicious Balance Among Absorption Coefficient, Emission Quantum Yield, and Photothermal Conversion Efficiency DOI

Xueqiong Zheng,

Jinying Zhao,

Kai Xue

et al.

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

Published: Feb. 4, 2025

Language: Английский

Citations

0
Narrowband Emissive Solution‐Processed Polymer Organic Light‐Emitting Diodes with External Quantum Efficiency Above 30% DOI Open Access

Lei Hua,

Han Wu, Zekun Xia

et al.

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

Published: March 27, 2025

Abstract Achieving both high‐efficiency and narrowband emission in thermally activated delayed fluorescence (TADF) polymers remains a formidable challenge. In this work, proof of concept for narrowband‐emissive TADF with partially conjugated structure is proposed by embedding silicon─carbon σ‐bond saturated spacer between the multiresonance (MR) unit polycarbazole backbone. A series PSix ( x = 1, 3, 6) then prepared characterized. All show full width at half maximum (FWHM) values 28–30 nm toluene solution. Impressively, polymer PSi3 has highest photoluminescence quantum yield, reaching 97%, doped films due to efficient reverse intersystem crossing process. The solution‐processed devices based on exhibit best performance external efficiency EQE max ) 28.8% an FWHM 42 nm. By employing molecule 5Cz‐TRZ as sensitizer, enhanced device 30.2% achieved, which first tier among MR‐TADF reported date. This work provides effective strategy achieving highly controlling chromophore

Language: Английский

Citations

0
Facile Synthetic Access Towards Sulfur- and Selenium-Functionalized Boron-Based Multiresonance TADF Emitters DOI Creative Commons

Zeynep Güven,

Hadi Dolati,

Leo Wessel

et al.

Molecules, Journal Year: 2024, Volume and Issue: 29(24), P. 5819 - 5819

Published: Dec. 10, 2024

Thermally activated delayed fluorescence (TADF) materials with high photoluminescence quantum yields and a fast reverse intersystem crossing (RISC) are of the highest interest for organic light-emitting diodes (OLEDs). In past decade, triaryl boranes multiple resonance effect (MR) have captured significant attention. The efficiency MR-TADF emitters strongly depends on small singlet-triplet energy gaps (ΔE

Language: Английский

Citations

1
Blue Multiresonance Thermally Activated Delayed Fluorescence Conjugated Polymers for Solution-Processable Narrowband Blue Organic Light-Emitting Diodes with High Color-Purity DOI
Tao Wang, Shuni Wang,

Junjie Dong

et al.

Macromolecules, Journal Year: 2024, Volume and Issue: unknown

Published: Dec. 28, 2024

Thermally activated delayed fluorescence (TADF) conjugated polymers generally exhibit red-shifted photoluminescence (PL) spectra compared to their TADF chromophores, owing the extension of conjugation along polymeric backbone. Developing blue TADF-conjugated polymers, particularly those with high color purity, continue pose a significant challenge. Herein, we design and synthesize batch multiresonance (MR)-TADF-conjugated by grafting an MR-emitting moiety as pendant onto backbone through unilateral para-carbon position nitrogen atom within MR moiety. These new emissions PL emission peaks ranging from 459 477 nm, accompanied full width at half-maximum (FWHM) values between 24 27 nm. Their electroluminescent devices via solution-processing demonstrate pure EQEmax 10.1%, Commission Internationale de I'Eclairage (CIE) coordinates (0.14, 0.12) FWHM 31 peaking 462 which best performance among polymer-based organic light-emitting diodes CIEy below 0.15.

Language: Английский

Citations

1