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Pentacene

About: Pentacene is a research topic. Over the lifetime, 5051 publications have been published within this topic receiving 161481 citations. The topic is also known as: 2,3:6,7-dibenzanthracene & benzo[b]naphthacene.


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Journal ArticleDOI
TL;DR: In this paper, single walled carbon nanotube (SWCNT) thin films with sheet resistivity 80% are used as electrodes for pentacene and regioregular poly(3-hexylthiophene) (P3HT) thin-film transistors (TFTs).

54 citations

Journal ArticleDOI
TL;DR: A lattice dynamics calculation to compute the "inherent structures" of minimum potential energy for pentacene, starting from available X-ray data shows that two distinct bulk crystalline phases of pentacenes exist.
Abstract: We have performed a lattice dynamics calculation to compute the “inherent structures” of minimum potential energy for pentacene, starting from available X-ray data. The calculation shows that two d...

54 citations

Journal ArticleDOI
TL;DR: In this article, a facile nonconventional lithographic patterning technique is developed for fabricating banks with microwell structures by inkjet printing solvent droplets onto a polymer layer, thereby locally dissolving the polymer to form microwells.
Abstract: The high-precision deposition of highly crystalline organic semiconductors by inkjet printing is important for the production of printed organic transistors. Herein, a facile nonconventional lithographic patterning technique is developed for fabricating banks with microwell structures by inkjet printing solvent droplets onto a polymer layer, thereby locally dissolving the polymer to form microwells. The semiconductor ink is then inkjet-printed into the microwells. In addition to confining the inkjet-printed organic semiconductor droplets, the microwells provide a platform onto which organic semiconductor molecules crystallize during solvent evaporation. When printed onto the hydrophilic microwells, the inkjet-printed 6,13-bis(triisopropylsilylethynyl) pentacene (TIPS_PEN) molecules undergo self-organization to form highly ordered crystalline structures as a result of contact line pinning at the top corner of the bank and the outward hydrodynamic flow within the drying droplet. By contrast, small crystallites form with relatively poor molecular ordering in the hydrophobic microwells as a result of depinning of the contact line along the walls of the microwells. Because pinning in the hydrophilic microwells occurred at the top corner of the bank, treating the surfaces of the dielectric layer with a hydrophobic organic layer does not disturb the formation of the highly ordered TIPS_PEN crystals. Transistors fabricated on the hydrophilic microwells and the hydrophobic dielectric layer exhibit the best electrical properties, which is explained by the solvent evaporation and crystallization characteristics of the organic semiconductor droplets in the microwell. These results indicate that this technique is suitable for patterning organic semiconductor deposits on large-area flexible substrates for the direct-write fabrication of high-performance organic transistors.

54 citations

Journal ArticleDOI
TL;DR: In this paper, the authors carried out an investigation on the origin of enhanced photoelectric characteristics in MoO 3 -doped pentacene films, including charge transport, trap density and conductivity.

54 citations

Journal ArticleDOI
TL;DR: A crystal engineering strategy is reported for the synthesis of supramolecular two-component organic material that exhibits reversible photochromism (yellow$green) and reversible conductivity (low conductivity$high conductivity) and no organic materials have been shown to contain all these three properties in combination.
Abstract: The design and discovery of novel organic electronic materials still poses a major challenge owing to their utility in fieldeffect transistors, memory devices, solar cells, lightemitting diodes, displays, and plastic electronics. The organic materials are of interest for designing electronics because of their easy fabrication, modulation capabilities, and cost-effectiveness. Several polyaromatic materials, such as tetracene, pentacene, perylene, and rubrene, were shown to be semiconductors owing to the existence of aromatic– aromatic interactions. Studies on tetrathaiafulvalene (TTF), which is a prototypical organic semiconductor, reveal the increase in charge mobility when TTF molecules are assembled through face-to-face aromatic interactions. Furthermore, TTF and tetracyanoquinodimethane (TCNQ) are known to form strong charge-transfer complexes and exhibit metallic conductance. Similarly, donor–acceptor charge-transfer (CT) complexes of TTF-imidazole with TCNQ, p-benzoquinone, and anilic acid-type acceptors exhibit a number of conducting and semiconducting materials. Despite of these potential examples based on chargetransfer interactions, very few attempts have been made to design new molecular organic semiconductors using crystal engineering strategies. Recently, the organic salt of tetraphenylethylene tetracarboxylic acid with 4,4’-bispyridyl ethylene was shown to exhibit semiconducting characteristics (meff= 0.38 cm V 1 s) owing to the presence of charge-assisted hydrogen bonding. On the other hand, photochromic materials, which can change their color and properties upon irradiation by light, are of importance for optical information storage and photonic switches. To date, many organic molecules have been shown to be semiconductors, many have been shown to be photochromic and many have been shown to be photoluminescent. To the best of our knowledge, no organic materials have been shown to contain all these three properties in combination. One of the early examples of exhibiting semiconductivity and photochromism is triphenylformazan based on cis–trans isomerization upon photoirradiation. Alternately, such materials are designed by incorporating photochromic molecules as a side chain to p-conjugated polymers. However, to the best of our knowledge, the multicomponent organic supramolecular photochromic material with switchable electrical conductivity has not been reported to date. Herein we report a crystal engineering strategy for the synthesis of supramolecular two-component organic material that exhibits reversible photochromism (yellow$green) and reversible conductivity (low conductivity$high conductivity). Carboxylic acidand pyridine-containing molecules are known to form two component materials by COOH and pyridine hydrogen-bonding interactions. These materials can be termed as either cocrystals (O H···N) or salts (N H···O ) based on the position of the proton involved in the interaction. During our ongoing crystal engineering studies on exploring the hydrogen-bonded networks of co-crystals or salts of H41 with various bis(pyridyl) derivatives, we have

54 citations


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Performance
Metrics
No. of papers in the topic in previous years
YearPapers
202382
2022176
2021111
2020125
2019151
2018159