A 1D Electrospun Nanofiber Channel for Organic Field‐Effect Transistors Using a Donor/Acceptor Planar Heterojunction Architecture

Chang, Hsuan-Chun; Chen, Wen‐Chang

doi:10.1002/admi.201500054

Cited by 11 publications

(10 citation statements)

References 40 publications

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“…Various semiconductor/insulator composites with desirable properties have been prepared in this manner via a judicious choice of the components. Tables 2 and summarize characteristics of various OFETs fabricated with different small‐molecule OSC/EIU blends and polymeric OSC/EIU blends, respectively. The formation of continuous layer(s) of a highly crystalline OSC across the channel of the transistor is critical for achieving high performance because organic transistors are interface devices with charge transport taking place in a very thin semiconductor layer near the semiconductor/dielectric interface between source and drain electrodes.…”

Section: Organic Semiconductor and Insulator Blendsmentioning

confidence: 99%

“…However, the rigid nature of conjugated polymers tends to hinder the chain entanglement that is required to formulate a sufficiently viscos ink for electrospinning. Introduction of flexible insulating polymers, such as poly(ethylene oxide) (PEO), poly(3‐caprolactone) (PCL), PSA, and PMMA, can give an appropriate viscosity to the solution. Jeong and co‐workers obtained uniform P3HT/PCL blend nanofibers by electrospinning .…”

Section: Organic Semiconductor and Insulator Blendsmentioning

confidence: 99%

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Effective Use of Electrically Insulating Units in Organic Semiconductor Thin Films for High‐Performance Organic Transistors

Kang

Qiu

et al. 2016

Adv Elect Materials

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The electrical properties of organic semiconductors (OSCs), whether they are conjugated small molecules or polymers, can be tailored by incorporating electrically insulating units (EIUs), which are organic moieties consisting of nonconjugated units. EIUs can be introduced to a thin film by synthetically connecting them to the otherwise conjugated OSC molecules or by blending them in as separate EIU molecules with the OSCs during the thin‐film fabrication process. The engineered EIUs are capable of imparting various additional functions to the OSC thin film and improving their electrical properties. In this review article, a comprehensive overview of various effects of EIUs on OSC thin films and their consequent electrical performance when used as active layers in organic field‐effect transistors (OFETs) is provided. A broad range of studies of the synthetic approaches of incorporating EIUs, such as those using side chains, block copolymers, and conjugation‐break spacers, and of the blending approaches with organic insulators is discussed. Finally, a brief summary and perspectives for future research in this field are presented.

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Section: Organic Semiconductor and Insulator Blendsmentioning

confidence: 99%

Section: Organic Semiconductor and Insulator Blendsmentioning

confidence: 99%

Effective Use of Electrically Insulating Units in Organic Semiconductor Thin Films for High‐Performance Organic Transistors

Kang

Qiu

et al. 2016

Adv Elect Materials

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“…The ambipolar transport behaviors of OSCs have shown obvious advantages in terms of building OFET-based integrated circuits, − with good electronic properties and simplified structures. The development of high-performance single-component ambipolar OSCs with well-balanced ambipolar transport characteristics, however, seems more challenging.…”

Section: Improving the Device Performancesmentioning

confidence: 99%

Interface Engineering in Organic Field-Effect Transistors: Principles, Applications, and Perspectives

et al. 2020

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Heterogeneous interfaces that are ubiquitous in optoelectronic devices play a key role in the device performance and have led to the prosperity of today’s microelectronics. Interface engineering provides an effective and promising approach to enhancing the device performance of organic field-effect transistors (OFETs) and even developing new functions. In fact, researchers from different disciplines have devoted considerable attention to this concept, which has started to evolve from simple improvement of the device performance to sophisticated construction of novel functionalities, indicating great potential for further applications in broad areas ranging from integrated circuits and energy conversion to catalysis and chemical/biological sensors. In this review article, we provide a timely and comprehensive overview of current efficient approaches developed for building various delicate functional interfaces in OFETs, including interfaces within the semiconductor layers, semiconductor/electrode interfaces, semiconductor/dielectric interfaces, and semiconductor/environment interfaces. We also highlight the major contributions and new concepts of integrating molecular functionalities into electrical circuits, which have been neglected in most previous reviews. This review will provide a fundamental understanding of the interplay between the molecular structure, assembly, and emergent functions at the molecular level and consequently offer novel insights into designing a new generation of multifunctional integrated circuits and sensors toward practical applications.

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“…Though a huge variety of polymers and copolymers have been finely designed and synthesised to meet the requirements for performant electronic and optoelectronic devices, the regioregular poly(3-hexylthiophene-2,5-diyl) (P3HT) is one of the most widely studied, resulting in a great improvement in knowledge on the relationship between structure, processing and postprocessing, and charge transport [ 6 , 12 , 13 , 14 , 15 , 16 , 17 ]. The possibility to process these polymers into micro- and nanofibres opens up new opportunities related to the strong molecular, mechanical, and electrical anisotropy along the fibre axis, as well as the size confinement.…”

Section: Introductionmentioning

confidence: 99%

“…An exception is provided by poly-para-phenylenevinylenes (PPVs), whose relatively flexible chains and high molecular weight allow for easy collection of fluorescent defect-free fibres [ 27 ]. Over the years, different strategies have been applied to overcome the issues related to the electrospinning of π-conjugated polymers: the surface polymerisation of the monomers onto electrospun polymer fibres [ 28 , 29 , 30 ], the coaxial electrospinning of the conjugated polymer with an outer spinnable polymer or solvent feed [ 12 , 13 , 16 , 31 , 32 ] , or the mixing of the conjugated polymer with a spinnable polymer in the starting solution, to assist the formation of fibres [ 18 , 33 , 34 ].…”

Section: Introductionmentioning

confidence: 99%

Conducting Electrospun Nanofibres: Monitoring of Iodine Doping of P3HT through Infrared (IRAV) and Raman (RaAV) Polaron Spectroscopic Features

2022

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Aligned polymer nanofibres are prepared by means of the electrospinning of a chlorobenzene solution containing regioregular poly(3-hexyltiophene -2,5-diyl), P3HT, and poly(ethylene oxide), PEO. The PEO scaffold is easily dissolved with acetonitrile, leaving pure P3HT fibres, which do not show structural modification. Polymer fibres, either with or without the PEO supporting polymer, are effectively doped by exposure to iodine vapours. Doping is monitored following the changes in the doping-induced vibrational bands (IRAVs) observed in the infrared spectra and by means of Raman spectroscopy. Molecular orientation inside the fibres has been assessed by means of IR experiments in polarised light, clearly demonstrating that electrospinning induces the orientation of the polymer chains along the fibre axis as well as of the defects introduced by doping. This work illustrates a case study that contributes to the fundamental knowledge of the vibrational properties of the doping-induced defects—charged polarons—of P3HT. Moreover, it provides experimental protocols for a thorough spectroscopic characterisation of the P3HT nanofibres, and of doped conjugated polymers in general, opening the way for the control of the material structure when the doped polymer is confined in a one-dimensional architecture.

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A 1D Electrospun Nanofiber Channel for Organic Field‐Effect Transistors Using a Donor/Acceptor Planar Heterojunction Architecture

Cited by 11 publications

References 40 publications

Effective Use of Electrically Insulating Units in Organic Semiconductor Thin Films for High‐Performance Organic Transistors

Effective Use of Electrically Insulating Units in Organic Semiconductor Thin Films for High‐Performance Organic Transistors

Interface Engineering in Organic Field-Effect Transistors: Principles, Applications, and Perspectives

Conducting Electrospun Nanofibres: Monitoring of Iodine Doping of P3HT through Infrared (IRAV) and Raman (RaAV) Polaron Spectroscopic Features

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