Aggregation-induced emission polymers for high performance PLEDs with low efficiency roll-off

Gu, Jiabao; Xu, Zheng; Ma, Dongge; Qin, Anjun; Tang, Ben Zhong

doi:10.1039/d0qm00012d

Cited by 27 publications

(16 citation statements)

References 29 publications

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“…This work had suggested that device fabrication using a TADF host and fluorescent polymers as emitters provides an alternative approach for developing high‐performance OLEDs. In addition, Tang's group [126] explored two TPE‐based AIE polymers, pTPE–DPA–Cz and pTPE–DPA–Flu, by incorporating the AIE unit of TPE–DPA in the main chains. The resulting polymers exhibited PL efficiencies of up to 63.3% in doped thin films.…”

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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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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“…As expected, the polymer showed typical AIE features in THF/water ( f w = 99%) with a Φ of 5.5%. Another examples depicted in Figure 31 are the compounds 85 and 86 that mix in their structure TPE , TPA and carbazole ( 85 ) or TPE , TPA and fluorene ( 86 ) [ 125 ]. In THF solution, both compounds show very similar spectroscopic properties, with absorptions centered at around 383 nm, emissions at around 500 nm and quantum yields in the vicinity of 1%.…”

Section: Fully Conjugated Polymersmentioning

confidence: 99%

Aggregation-Induced Emission Properties in Fully π-Conjugated Polymers, Dendrimers, and Oligomers

et al. 2021

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Aggregation-Induced Emission (AIE) in organic molecules has recently attracted the attention of the scientific community because of their potential applications in different fields. Compared to small molecules, little attention has been paid to polymers and oligomers that exhibit AIE, despite having excellent properties such as high emission efficiency in aggregate and solid states, signal amplification effect, good processability and the availability of multiple functionalization sites. In addition to these features, if the molecular structure is fully conjugated, intramolecular electronic interactions between the composing chromophores may appear, thus giving rise to a wealth of new photophysical properties. In this review, we focus on selected fully conjugated oligomers, dendrimers and polymers, and briefly summarize their synthetic routes, fluorescence properties and potential applications. An exhaustive comparison between spectroscopic results in solution and aggregates or in solid state has been collected in almost all examples, and an opinion on the future direction of the field is briefly stated.

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“…[ 11‐13 ] Compared with small molecules, polymers boast good processability, facile functionalization, structural diversity, and high thermal stability, which endow polymer materials with broad application fields. [ 14 ]…”

Section: Background and Originality Contentmentioning

confidence: 99%

Photodegradation‐Induced Turn‐On Luminescence of Tetraphenylethylene‐Based Trithiocarbonate Polymers^†

Shen

Liu

et al. 2021

Chin. J. Chem.

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Main observation and conclusion Fluorescent intelligent materials have attracted wide attention because of their great potential applications. One major hurdle for the development and application of fluorescent intelligent materials is the aggregation‐caused quenching effect in the solid state. Herein, tetraphenylethylene‐based trithiocarbonate polymers with satisfactory molecular weights (Mw up to 24900) were synthesized through a one‐pot polymerization route under mild conditions. The polymers were non‐emissive due to the quenching effect of the trithiocarbonate group. However, upon UV irradiation, the polymers degraded and strong emission from the tetraphenylethylene unit was observed. Such a unique property endows them with great potential applications, such as photopatterning, anti‐counterfeit labels, and UV detection.

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Aggregation-induced emission polymers for high performance PLEDs with low efficiency roll-off

Abstract: AIE polymers pTPE-DPA-Cz and pTPE-DPA-Flu are synthesized and used as emitting layers in doped and non-doped polymeric LEDs through a solution process, and show maximum EQE of 3.26% in the doped PLEDs and CE of 3.69 cd A−1 for the non-doped PLEDs and low efficiency roll-off.

Cited by 27 publications

References 29 publications

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

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

Aggregation-Induced Emission Properties in Fully π-Conjugated Polymers, Dendrimers, and Oligomers

Photodegradation‐Induced Turn‐On Luminescence of Tetraphenylethylene‐Based Trithiocarbonate Polymers^†

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Aggregation-induced emission polymers for high performance PLEDs with low efficiency roll-off

Abstract: AIE polymers pTPE-DPA-Cz and pTPE-DPA-Flu are synthesized and used as emitting layers in doped and non-doped polymeric LEDs through a solution process, and show maximum EQE of 3.26% in the doped PLEDs and CE of 3.69 cd A−1 for the non-doped PLEDs and low efficiency roll-off.

Cited by 27 publications

References 29 publications

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

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

Aggregation-Induced Emission Properties in Fully π-Conjugated Polymers, Dendrimers, and Oligomers

Photodegradation‐Induced Turn‐On Luminescence of Tetraphenylethylene‐Based Trithiocarbonate Polymers†

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Photodegradation‐Induced Turn‐On Luminescence of Tetraphenylethylene‐Based Trithiocarbonate Polymers^†