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

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

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Recent Progress in Molecular Design of Boron/Nitrogen‐Based Multi‐Resonance Materials for Narrowband Organic Light‐Emitting Diodes

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

Published: April 11, 2025

Abstract Luminescent boron‐nitrogen (BN)‐type multi‐resonance (MR) materials have been first reported by Hatakeyama and co‐workers in 2016. BN‐type MR attracted a lot of attention, because their unique photophysical properties, including narrowband emissions, high photoluminescent quantum yields, thermally activated delayed fluorescent (TADF) properties. MR‐TADF are considered as the next‐generation luminescent for efficient, stable, narrow‐emission organic light‐emitting diodes (OLEDs). Herein, comprehensive review recent progress is provided highlighting structures, device performances. Moreover, future perspective development will be discussed.

Language: Английский

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Recent Advances in Developing Optical and Electrochemical Sensors for Monitoring Thiram and Future Perspectives

Journal of Agricultural and Food Chemistry, Journal Year: 2024, Volume and Issue: 72(42), P. 23024 - 23038

Published: Oct. 13, 2024

Thiram, as one widely used dithiocarbamate pesticide, has been considered seriously detrimental to food safety and human health because of poor efficiency, nonstandard/superfluous usage, lack a targeting effect. Developing high-performance sensors for thirams is strongly needed. With the rapid development chemistry, biology, materials science, many have constructed thiram with high sensitivity selectivity. Regarding energy form signal, recognition mode, detection principle, recent advances in design construction optical electrochemical are summarized this review, including colorimetric, luminescent, chemiluminescent, sensors. The advantages disadvantages sensitivity, ability avoid interference, mechanism, signal output practicability clarified detail. Furthermore, challenges faced, effective restrictions, next direction proposed achieving more sensitive selective analysis less interference. We desire that review will supply solid theoretical basis inspiration generate innovative thinking new progress on assays commercialization developed future.

Language: Английский

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Governing hybridized local and Charge-Transfer state in B,N-Embedded emitters for OLEDs

Chemical Engineering Journal, Journal Year: 2024, Volume and Issue: unknown, P. 158909 - 158909

Published: Dec. 1, 2024

Language: Английский

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