AC-biased organic light-emitting field-effect transistors from naphthyl end-capped oligothiophenes

Liu, Xuhai; Wallmann, Ivonne; Boudinov, H.; Kjelstrup‐Hansen, Jakob; Schiek, Manuela; Lützen, Arne; Rubahn, Horst‐Günter

doi:10.1016/j.orgel.2010.03.015

Cited by 24 publications

(22 citation statements)

References 26 publications

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“…Tian et al reported the synthesis of NaT2 and NaT3 by a Stille cross-coupling approach. 23 Since we recently were able to employ Suzuki cross-coupling protocols for NaT, MONaT, NaT2 and MONaT2 thereby avoiding toxic organotin compounds, 31,32 we used this strategy for NaT3 and MONaT3, too; Scheme S3 (ESI †) depicts the synthesis. Solvents were dried, distilled, and stored under argon according to standard procedures.…”

Section: Synthesismentioning

confidence: 99%

Substrate steered crystallization of naphthyl end-capped oligothiophenes into nanofibers: the influence of methoxy-functionalization

Balzer

Schiek

Osadnik

et al. 2014

Phys. Chem. Chem. Phys.

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Naphthyl end-capped oligothiophenes are a class of materials well suited for high-performance organics based devices. The formation of nanofibers on muscovite mica from 2,5-bis(naphth-2-yl)thiophene (NaT), 5,5'-bis(naphth-2-yl)-2,2'-bithiophene (NaT2), and 5,5''-bis(naphth-2-yl)-2,2':5',2''-terthiophene (NaT3) as well as of the methoxy-functionalized variants MONaT, MONaT2, and MONaT3 is investigated via atomic force microscopy, X-ray diffraction, polarized fluorescence microscopy, and fluorescence spectroscopy. From polarized fluorescence microscopy spatially resolved molecular orientations are deduced revealing a profound anisotropy. Fibers from lying molecules grow along distinct substrate directions. Methoxy-functionalization substantially increases the crystallization into aligned fibers. In air Ostwald ripening is observed. The morphological variations of the aggregates result in specific optical signatures, disclosed by temperature dependent and spatially resolved fluorescence spectra.

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Section: Synthesismentioning

confidence: 99%

Substrate steered crystallization of naphthyl end-capped oligothiophenes into nanofibers: the influence of methoxy-functionalization

Balzer

Schiek

Osadnik

et al. 2014

Phys. Chem. Chem. Phys.

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“…The phenomenon of localized, polarized, and wave-guided EL was realized in aligned nanofibers on OFETs by applying AC bias on the gate electrodes [761], which caused sequential injection of holes and electrons resulting in charge carrier recombination leading to light emission from a small area near the metal-nanofiber interface. In this configuration, the nanofibers acted as optical waveguides and part of the generated light was therefore guided along the nanofibers, which finally radiated from the fiber end.…”

Section: Discussionmentioning

confidence: 99%

Organic semiconductors for device applications: current trends and future prospects

Ahmad

2014

Journal of Polymer Engineering

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Abstract:With the rich experience of developing silicon devices over a period of the last six decades, it is easy to assess the suitability of a new material for device applications by examining charge carrier injection, transport, and extraction across a practically realizable architecture; surface passivation; and packaging and reliability issues besides the feasibility of preparing mechanically robust wafer/substrate of single-crystal or polycrystalline/ amorphous thin films. For material preparation, parameters such as purification of constituent materials, crystal growth, and thin-film deposition with minimum defects/ disorders are equally important. Further, it is relevant to know whether conventional semiconductor processes, already known, would be useable directly or would require completely new technologies. Having found a likely candidate after such a screening, it would be necessary to identify a specific area of application against an existing list of materials available with special reference to cost reduction considerations in large-scale production. Various families of organic semiconductors are reviewed here, especially with the objective of using them in niche areas of large-area electronic displays, flexible organic electronics, and organic photovoltaic solar cells. While doing so, it appears feasible to improve mobility and stability by adjusting π-conjugation and modifying the energy bandgap. Higher conductivity nanocomposites, formed by blending with chemically conjugated C-allotropes and metal nanoparticles, open exciting methods of designing flexible contact/interconnects for organic and flexible electronics as can be seen from the discussion included here.

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“…It can be seen from the abovementioned sections that most studies have focused on OLETs with direct current‐gate (DC) operation. Instead of the commonly employed DC voltages, OLETs with alternating current‐gate (AC) voltages have renovated the operation conditions of their devices, which can effectively inject holes and electrons into the active layers without varying the device structures . Furthermore, stable metals such as gold and platinum can be used in these electrodes to inject carriers.…”

Section: The Construction Of Oletsmentioning

confidence: 99%

“…d) EL images from NaT 2 with yellow emission under the same operation. Reproduced with permission . Copyright 2010, Elsevier B.V. e) Overlay of EL (greyscale) and PL (color) images exhibit EL emission from multicolored OLET based on PPTTPP and p‐6P fibers.…”

Section: The Construction Of Oletsmentioning

confidence: 99%

Organic Light‐Emitting Field‐Effect Transistors: Device Geometries and Fabrication Techniques

2018

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Organic light-emitting transistors (OLETs), as novel and attractive kinds of organic electronic devices, have gained extensive attention from both academia and industry. The unique device architectures can simultaneously combine the electrical switching functionality of organic field-effect transistors and the light generation capability of organic light-emitting diodes in a single device, thereby holding great promise for reducing the complicated processes of next-generation pixel circuitry. This review involves the design, fabrication, and applications of OLETs with a comprehensive coverage of this field with the aim to give a deep insight into the intrinsic mechanisms of devices. Challenges and future prospects of OLETs are also discussed.

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AC-biased organic light-emitting field-effect transistors from naphthyl end-capped oligothiophenes

Cited by 24 publications

References 26 publications

Substrate steered crystallization of naphthyl end-capped oligothiophenes into nanofibers: the influence of methoxy-functionalization

Substrate steered crystallization of naphthyl end-capped oligothiophenes into nanofibers: the influence of methoxy-functionalization

Organic semiconductors for device applications: current trends and future prospects

Organic Light‐Emitting Field‐Effect Transistors: Device Geometries and Fabrication Techniques

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