A rational design strategy for red thermally activated delay fluorescence emitter employing 2,1,3-benzothiadiazole skeleton with asymmetric structure

Huo, Jinnan; Zheng, Yanan; Zhang, Di; Xu, Huixia; Li, Yanbo; Miao, Yanqin; Shi, Heping; Tang, Ben Zhong

doi:10.1016/j.dyepig.2021.109781

Cited by 12 publications

(4 citation statements)

References 41 publications

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Section: Resultsmentioning

confidence: 99%

“…When the temperature is increased from 100 K to 300 K, delayed fluorescence is slightly enhanced, but the enhancement is not obvious, probably because DCBTRZ and PPCTRZ have large RISC constants at low temperatures. [36][37][38] To further understand the excited state characteristics of DCBTRZ and PPCTRZ, the corresponding kinetics parameters in doped films were calculated and are shown in Table 4. The RISC rate constant (k RISC ) values of DCBTRZ and PPCTRZ are 12.69 Â 10 6 s À1 and 3.40 Â 10 6 s À1 , respectively.…”

Section: Photoluminescence Transient Decay Characteristicsmentioning

confidence: 99%

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New strategy for developing deep blue TADF materials with narrow emission and CIE_y < 0.06 employing host materials as donors

Wang

Yao

et al. 2023

New J. Chem.

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Section: Resultsmentioning

confidence: 99%

Section: Photoluminescence Transient Decay Characteristicsmentioning

confidence: 99%

New strategy for developing deep blue TADF materials with narrow emission and CIE_y < 0.06 employing host materials as donors

Wang

Yao

et al. 2023

New J. Chem.

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“…Tang, Miao, and coworkers [111] also explored a red AIDF emitter based on D–A–Dʹ framework, named, BCZ–BTD–AD, by melding a DMAC donor to benzothiadiazole core. These two emitters exhibit AIE feature when the water fraction ( f w ) reaches to 40 and 60%, which is derived from its orthometric molecular conformation with large steric hindrance.…”

Section: Delayed Fluorescent Aiegensmentioning

confidence: 99%

Aggregation‐induced emission luminogens for organic light‐emitting diodes with a single‐component emitting layer

et al. 2022

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Organic light‐emitting diodes (OLEDs) have garnered increasing attention as a promising candidate for application in next‐generation displays and solid‐state lighting devices. The doping technique commonly used to fabricate light‐emitting layers (EMLs) of OLEDs disperses the emitting material in a host matrix to mitigate aggregation‐induced quenching (ACQ). Alternatively, owing to their high efficiency and ease of manufacture, nondoped OLEDs have been developed as a substitute for doped OLEDs. When fabricating nondoped OLEDs, it is essential to suppress the ACQ effect in the EML and efficiently utilize the generated excitons for radiative decay. Since the discovery of aggregation‐induced emission (AIE) by Tang et al., significant work has been done to improve the stability and efficiency of nondoped OLEDs based on fluorescent AIE luminogens (AIEgens). Fluorescent AIEgens, synthesized using various molecular frameworks, such as silole, tetra/triphenylethylene, tetraphenylpyrazine, and tetraphenylbenzene, exhibit high photoluminescence quantum yields in the solid state. Therefore, many studies have reported that fluorescent AIEgen‐based OLEDs have excellent external quantum efficiency and exhibit emission at various wavelengths, including deep‐blue/blue/green emission. With the development of fluorescent AIEgens, delayed fluorescent AIEgens with efficient triplet utilization through reverse intersystem crossing and AIE properties have been adopted as ideal emitters and used in nondoped OLEDs. This review systematically discusses and summarizes recent reports on the development of AIEgens for nondoped OLEDs by grouping them into fluorescent and delayed fluorescent AIEgens. The purpose of this review is to provide deep insights into the design of novel AIEgens for high‐performance nondoped OLEDs.

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“…Recently, pyrazine and quinoxaline derivatives have been successfully employed as electron acceptors to construct efficient TADF emitters for yellow and red OLEDs due to their strong electron-withdrawing ability and planar rigidity. [35][36][37][38][39][40][41] In this work, we designed and synthesized two novel TADF emitters, namely DMAC-QCN and PXZ-QCN, featuring dimethylacridine (DMAC) or phenoxazine (PXZ) as an electron donor, and a quinoxaline-4,4 0dicyanobenzene unit (QCN) as an electron acceptor (Scheme 1). DMAC-QCN and PXZ-QCN show TADF characteristics with small DE ST of 0.08 and 0.03 eV, and short delayed fluorescence lifetimes of 4.7 and 1.8 ms, respectively.…”

Section: Introductionmentioning

confidence: 99%

Efficient yellow and red thermally activated delayed fluorescence materials based on a quinoxaline-derived electron-acceptor

Jiang

Zhao

et al. 2022

New J. Chem.

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A rational design strategy for red thermally activated delay fluorescence emitter employing 2,1,3-benzothiadiazole skeleton with asymmetric structure

Cited by 12 publications

References 41 publications

New strategy for developing deep blue TADF materials with narrow emission and CIE_y < 0.06 employing host materials as donors

New strategy for developing deep blue TADF materials with narrow emission and CIE_y < 0.06 employing host materials as donors

Aggregation‐induced emission luminogens for organic light‐emitting diodes with a single‐component emitting layer

Efficient yellow and red thermally activated delayed fluorescence materials based on a quinoxaline-derived electron-acceptor

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A rational design strategy for red thermally activated delay fluorescence emitter employing 2,1,3-benzothiadiazole skeleton with asymmetric structure

Cited by 12 publications

References 41 publications

New strategy for developing deep blue TADF materials with narrow emission and CIEy < 0.06 employing host materials as donors

New strategy for developing deep blue TADF materials with narrow emission and CIEy < 0.06 employing host materials as donors

Aggregation‐induced emission luminogens for organic light‐emitting diodes with a single‐component emitting layer

Efficient yellow and red thermally activated delayed fluorescence materials based on a quinoxaline-derived electron-acceptor

Contact Info

Product

Resources

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New strategy for developing deep blue TADF materials with narrow emission and CIE_y < 0.06 employing host materials as donors

New strategy for developing deep blue TADF materials with narrow emission and CIE_y < 0.06 employing host materials as donors