Structurally simple OLEDs based on a new fluorinated poly(oxindolylidenearylene)

Lozano-Hernández, Luis-Abraham; Maldonado, José‐Luis; Hernández-Cruz, Olivia; Nicasio-Collazo, Juan; Rodríguez, Mario; Barbosa-Garcı́a, Oracio; Ramos‐Ortíz, Gabriel; Zolotukhin, M.G.; Scherf, Ullrich

doi:10.1016/j.dyepig.2019.107989

Cited by 14 publications

(4 citation statements)

References 56 publications

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“…b) Schematic of OLED structure. c) Energy level diagram for components used in the OLED device, [ 70,71 ] and chemical structure of d) Super Yellow (SY) and e) PFN polymers purchased and used in this report.…”

Section: Methodsmentioning

confidence: 99%

Slot‐Die Coating of All Organic/Polymer Layers for Large‐Area Flexible OLEDs: Improved Device Performance with Interlayer Modification

Amruth

Dubey

Pahlevani

et al. 2021

Adv Materials Technologies

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Organic light‐emitting diodes (OLEDs) fabricated on flexible transparent substrates have found application in displays, lighting, and signage. Optimization of the fabrication procedures is critical for commercialization to maximize performance and reduce costs. Utilization of the slot‐die coating technique, a solution‐processing roll‐to‐roll method, has emerged as a viable method to manufacture flexible OLED devices. Here, the fabrication of flexible OLEDs via the slot‐die coating technique under ambient condition is reported. The OLEDs have a simple architecture of polyethylene terephthalate (PET)/indium–tin oxide (ITO)/hole injection layer (HIL)/emissive layer (EML)/electron injection layer (EIL)/Ag, where poly(3,4‐ethylenedioxythiophene):polystyrene sulfonate (PEDOT:PSS) is used as the HIL, Super Yellow (SY, poly(1,4‐phenylenevinylene) copolymer) is used as the EML, and poly((9,9‐bis(3′‐(N,N‐dimethylamino)propyl)‐2,7‐fluorene)‐alt‐2,7‐(9,9‐dioctylfluorene)) (PFN) is used as the EIL. The optimization of the PFN layer using slot‐die coating technique is focused by varying solvent, solvent additives, substrate temperature, and coating speeds. The OLEDs that have PFN layers processed with the known solvent additives, 1,8‐diiodooctane (DIO) or diphenyl ether (DPE), show a performance increase compared to OLEDs based on PFN layers processed with no solvent additives. Finally, large‐area multicolor OLEDs are constructed with organic/polymer layers being slot‐die coated in sequence, of which all display homogeneous luminance under bending/folding conditions, highlighting the potential of this simple device structure and processing method.

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Section: Methodsmentioning

confidence: 99%

Slot‐Die Coating of All Organic/Polymer Layers for Large‐Area Flexible OLEDs: Improved Device Performance with Interlayer Modification

Amruth

Dubey

Pahlevani

et al. 2021

Adv Materials Technologies

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“…4 In recent years, fluorinated arenes and biphenyls have also been implemented in OLEDs. 5 Another application is the usage of highly fluorinated frameworks, such as terphenyls, as backbones for halogen bond donors (halogen-based Lewis acids), 6 which has gained a lot of interest. Due to their electron withdrawal, they enable strong halogen bonds, which then can be used in molecular recognition studies, 7 8 crystal engineering studies, 9 and organocatalysis.…”

Section: Table 1 Screening Reaction Conditions For Organozinc Compound Formationmentioning

confidence: 99%

Synthesizing Highly Fluorinated Oligophenyls via Negishi Coupling of Fluoroarylzinc Pivalates

Stoesser

Huber

2021

Synthesis

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Previously established general synthetic methods for the synthesis of highly fluorinated biphenyls using Suzuki-Miyaura protocols require the use of organoboron compounds which are not very stable under reactions conditions and thus need to be used in large excess. Herein we report an improved general strategy for the synthesis of highly fluorinated biphenyls, terphenyls and phenyl-substituted terphenyls using organozinc pivalates. The influence of several parameters was investigated: a) in a series of different monodentate phosphine ligands, X-Phos showed the best performance; b) a higher yield could be obtained for substrates bearing less steric hindrance or lower amount of fluorine substitution; c) as iodinated substrates decomposed during the reaction, brominated electrophiles were found to be superior. The presented protocol is scalable, versatile, and works with commonly used and commercially available phosphine ligands (X Phos) and palladium sources (Pd2dba3). Also, it does not need excess nucleophile usage for terphenyl synthesis and only a slight such excess for the preparation of phenyl substituted terphenyls.

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“…Fluorene has been extensively studied in optoelectronic applications, namely photovoltaics, photoelectrics, etc., primarily due to its excellent electrochemical properties, high degree of conjugation and ease of chemical modification 67,68 . Fluorene is also frequently used as electron donor in polymer memristive materials, in which chemically modifying the acceptor units that link with fluorene can effectively adjust the electronic properties of the macromolecule for memory applications.…”

Section: Conjugated Memristive Polymers For Data Storage Memoriesmentioning

confidence: 99%

Conjugated polymers for information storage and neuromorphic computing

Liu

Chen

Liu

2020

Polymer International

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In the era of information explosion, silicon‐based storage can barely meet the burgeoning demand for data storage and making Moore's law no longer accurate. What is more, the traditional von Neumann architecture separates the computing module from the storage unit, which causes a slowing down of the overall computing efficiency. Conjugated polymer memristors, due to the advantages of simple fabrication, convenient operation and low cost, are considered as promising candidates for next‐generation memory and neuromorphic computing applications. This review summarizes the advances in conjugated polymer memristive materials and devices made during the first two decades of the 21st century, and their potential applications in information storage and neuromorphic computing. Focuses are on switching mechanisms and materials classifications, as well as memory, artificial synapse and bioinspired and in‐memory computing performance. © 2020 Society of Chemical Industry

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Structurally simple OLEDs based on a new fluorinated poly(oxindolylidenearylene)

Cited by 14 publications

References 56 publications

Slot‐Die Coating of All Organic/Polymer Layers for Large‐Area Flexible OLEDs: Improved Device Performance with Interlayer Modification

Slot‐Die Coating of All Organic/Polymer Layers for Large‐Area Flexible OLEDs: Improved Device Performance with Interlayer Modification

Synthesizing Highly Fluorinated Oligophenyls via Negishi Coupling of Fluoroarylzinc Pivalates

Conjugated polymers for information storage and neuromorphic computing

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