A symmetric nonpolar blue AIEgen as nondoped fluorescent OLED emitter with low efficiency roll-off

Fei, Nannan; Wei, Qiang; Cao, Liang; Bai, Yongqi; Ji, Honglei; Peng, Ruixiang; Huang, Like; Hao, Shiyou; Ge, Ziyi

doi:10.1016/j.orgel.2019.105574

Cited by 19 publications

(11 citation statements)

References 36 publications

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“…The TPA provided rigidity to the molecule exhibiting T g and T d of 168.3 and 537 °C, respectively. [ 38 ] The donor–acceptor–donor (D–A–D)‐based molecule with TPA and TPE was synthesized by Ma et al in 2020. [ 39 ] The enhanced PL was observed with the addition of benzothiophene‐ S , S ‐dioxide, between TPA and TPE in compound 28 .…”

Section: Molecules With Non‐d–a Structuresmentioning

confidence: 99%

Approaches for Fabricating Tri‐ and Tetraphenylethene‐Based Blue Organic Light‐Emitting Diodes Using Donor–Acceptor and Non‐Donor–Acceptor Molecular Architectures

Harshini

Devibala

Angela

et al. 2022

Physica Rapid Research Ltrs

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Organic light‐emitting diodes (OLEDs) have exceeded expectations in terms of portability and affordability; still there is potential for advancement in terms of efficiency and color changeability. Research on flexible displays and OLED light emission is hampered by the low solid‐state efficiency and bandgap discrepancies of blue light emitters. However, aggregation‐induced emission (AIE) presents an opportunity to create efficient blue emitters. By suppressing the π‐π stacking interactions, triphenylethene (TriPE) and tetraphenylethene (TPE) molecule‐based AIE luminogens exhibit outstanding solid‐state emission and increased device efficiency. Additionally, the presence of TriPE and TPE donor units in the architecture of non‐donor–acceptor (non‐D–A)‐ and donor–acceptor (D–A)‐based architectures has increased chemical and thermal stability with high efficiency. This article emphasizes multiple device architectures and different light emissions (blue, red, and green) set forth by potential electron donating/accepting molecules possessing intriguing efficiency in the device fabrication. It also presents the substitution effect on TriPE and TPE donor units and the applicability of non‐D–A and D–A systems in OLEDs.

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Section: Molecules With Non‐d–a Structuresmentioning

confidence: 99%

Approaches for Fabricating Tri‐ and Tetraphenylethene‐Based Blue Organic Light‐Emitting Diodes Using Donor–Acceptor and Non‐Donor–Acceptor Molecular Architectures

Harshini

Devibala

Angela

et al. 2022

Physica Rapid Research Ltrs

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“…In recent years, the solid-state luminescence of organic materials has drawn much attention due to the rapid development of optoelectronic devices and applications such as organic light emitting diodes (OLEDs) [ 1 , 2 , 3 ], optical sensors [ 4 ], stimuli responses, and anti-counterfeit printing [ 5 ]. However, many organic materials exhibit intense fluorescence emission in dilute solutions, while the emission is severely quenched in the aggregate state.…”

Section: Introductionmentioning

confidence: 99%

Tuning Photophysical Properties via Positional Isomerization of the Pyridine Ring in Donor–Acceptor-Structured Aggregation-Induced Emission Luminogens Based on Phenylmethylene Pyridineacetonitrile Derivatives

et al. 2023

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A series of aggregation-induced emission (AIE)-featured phenylmethylene pyridineacetonitrile derivatives named o-DBCNPy ((Z)-3-(4-(di-p-tolylamino)phenyl)-2-(pyridin-2-yl)acrylonitrile), m-DBCNPy ((Z)-3-(4-(di-p-tolylamino)phenyl)-2-(pyridin-3-yl)acrylonitrile), and p-DBCNPy ((Z)-3-(4-(di-p-tolylamino)phenyl)-2-(pyridin-4-yl)acrylonitrile) have been synthesized by tuning the substitution position of the pyridine ring. The linkage manner of the pyridine ring had influences on the molecular configuration and conjugation, thus leading to different photophysical properties. The absorption and fluorescence emission peak showed a bathochromic shift when the linking position of the pyridine ring changed from the meta to the ortho and para position. Meanwhile, o-DBCNPy exhibited the highest fluorescence quantum yield of 0.81 and the longest fluorescence lifetime of 7.96 ns as a neat film among all three isomers. Moreover, non-doped organic light-emitting diodes (OLEDs) were assembled in which the molecules acted as the light-emitting layer. Due to the relatively prominent emission properties, the electroluminescence (EL) performance of the o-DBCNPy-based OLED was superior to those of the devices based on the other two isomers with an external quantum efficiency (EQE) of 4.31%. The results indicate that delicate molecular modulation of AIE molecules could endow them with improved photophysical properties, making them potential candidates for organic photoelectronic devices.

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“…As is shown in Figure 1 , AIE fluorophores exhibit bright fluorescence in the aggregated state but very weak fluorescence in good solvent, making them ideal “turn-on” fluorescent probes for bioanalysis ( Chen et al, 2020a ; Huang et al, 2020a ; Li et al, 2020a ; Yang et al, 2020a ; Zhang et al, 2020b ; Korzec et al, 2020 ). With sufficient special and unique optical properties, including their simple molecular structure ( Pratihar et al, 2020 ), high SNR (signal-to-noise ratio) ( Xu et al, 2020a ), high luminescence efficiency ( Ma et al, 2020a ; Fei et al, 2020 ; Leng et al, 2020 ), excellent photostability ( Jiang et al, 2020a ; Mondal et al, 2020a ; Wei et al, 2020 ), and biocompatibility ( Xu et al, 2020b ; Zhu et al, 2020 ), AIE fluorescent probes have been widely used as fluorescent components of molecular probes and nanoprobes for biomedical applications in clinical examination and therapy as well as in biological sensing ( Gao et al, 2020b ; Zhao et al, 2020b ; Xu et al, 2020c ; Su et al, 2020 ) and in vivo theranostics.…”

Section: Introductionmentioning

confidence: 99%

Insights into AIE materials: A focus on biomedical applications of fluorescence

et al. 2022

Front. Chem.

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Aggregation-induced emission (AIE) molecules have garnered considerable interest since its first appearance in 2001. Recent studies on AIE materials in biological and medical areas have demonstrated that they show their promise as biomaterials for bioimaging and other biomedical applications. Benefiting from significant advantages of their high sensitivity, excellent photostability, and good biocompatibility, AIE-based materials provide dramatically improved analytical capacities for in vivo detection and demonstration of vital biological processes. Herein, we introduce the development history of AIE molecules and recent progress in areas of biotesting and bioimaging. Additionally, this review also offers an outlook for the potential applications of versatile AIE materials for tracing and treating pathological tissues, including overcoming challenges and feasible solutions.

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A symmetric nonpolar blue AIEgen as nondoped fluorescent OLED emitter with low efficiency roll-off

Cited by 19 publications

References 36 publications

Approaches for Fabricating Tri‐ and Tetraphenylethene‐Based Blue Organic Light‐Emitting Diodes Using Donor–Acceptor and Non‐Donor–Acceptor Molecular Architectures

Approaches for Fabricating Tri‐ and Tetraphenylethene‐Based Blue Organic Light‐Emitting Diodes Using Donor–Acceptor and Non‐Donor–Acceptor Molecular Architectures

Tuning Photophysical Properties via Positional Isomerization of the Pyridine Ring in Donor–Acceptor-Structured Aggregation-Induced Emission Luminogens Based on Phenylmethylene Pyridineacetonitrile Derivatives

Insights into AIE materials: A focus on biomedical applications of fluorescence

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