Abstract In this contribution we review the motivations for, and recent advances in, new gate dielectric materials for incorporation into organic thin‐film transistors (OTFTs) electronics. After a general introduction to OTFT materials, operating principles, processing requirements optimizing low‐cost electronics, focuses on three classes of OTFT‐compatible dielectrics: i) inorganic (high‐ k ) materials; ii) polymeric iii) self‐assembled mono‐ and/multilayer materials. The principal goals in...

Taking up the semiconducting baton: Organic field-effect transistors fabricated with a new class of extremely electron-deficient cyanated perylene diimides are air-stable and exhibit n-type mobilities as high 0.64 cm2 V−1 s−1 (see scheme). Devices can be from vapor-deposited solution-cast films well top- bottom-contact electrode configurations. Supporting information for this article is available on WWW under http://www.wiley-vch.de/contents/jc_2002/2004/z461324_s.pdf or author. Please note:...

A generalized platform for introducing a diverse range of biomolecules into living cells in high-throughput could transform how complex cellular processes are probed and analyzed. Here, we demonstrate spatially localized, efficient, universal delivery immortalized primary mammalian using surface-modified vertical silicon nanowires. The method relies on the ability nanowires to penetrate cell’s membrane subsequently release surface-bound molecules directly cytosol, thus allowing highly...

This study describes a general approach for probing semiconductor-dielectric interfacial chemistry effects on organic field-effect transistor performance parameters using bilayer gate dielectrics. Organic semiconductors exhibiting p-/n-type or ambipolar majority charge transport are grown six different dielectric structures consisting of various spin-coated polymers/HMDS 300 nm SiO(2)/p(+)-Si, and characterized by AFM, SEM, WAXRD, followed electrical characterization. In the case...

A new family of perfluoroarene-modified thiophene semiconductors 1–3 has been synthesized to assess the influence perfluoroarene introduction and regiochemistry on molecular thin-film transistor properties. Compound 1 is an n-type semiconductor with a mobility approaching 0.1 cm2 V−1 s−1 whereas 2 3 exhibit p-type behavior. These results show that origin carrier not solely consequence solution/film LUMO HOMO energies. Supporting information for this article available WWW under...

The quest for high-performance organic thin-film transistor (OTFT) gate dielectrics is of intense current interest. Beyond having excellent insulating properties, such materials must meet other stringent requirements optimum OTFT function: efficient low-temperature solution fabrication, mechanical flexibility, and compatibility with diverse semiconductors. OTFTs should function at low biases to minimize power consumption, hence the dielectric exhibit large capacitance. We report realization...

The synthesis, comparative physicochemical properties, and solid-state structures of five oligothiophene (nT) series differing in substituent nature attachment, regiochemistry, core length (n) are described. These include the following 25 compounds: (i) alpha,omega-diperfluorohexyl-nTs 1 (DFH-nTs, n = 2-6), (ii) beta,beta'-diperfluorohexyl-nTs 2 (isoDFH-nTs, (iii) alpha,omega-dihexyl-nTs 3 (DH-nTs, (iv) beta,beta'-dihexyl-nTs 4 (isoDH-nTs, (v) unsubstituted oligothiophenes 5 (alphanTs, 2-6)....

Owing to the mixed electron/hole and ion transport in aqueous environment, poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate)-based organic electrochemical transistor has been regarded as one of most promising device platforms for bioelectronics. Nonetheless, there exist very few in-depth studies on how intrinsic channel material properties affect their performance long-term stability environments. Herein, we investigated correlation among film microstructural crystallinity/composition,...

Despite intensive research on photochemical activation of sol–gel metal oxide materials, the relatively long processing time and lack deep understanding underlying chemical courses have limited their broader impact diverse materials applications such as thin‐film electronics, photovoltaics, catalysts. Here, in‐depth studies rapid films using various spectroscopic electrical investigations for physicochemical mechanism are reported. Based exhaustive physical analysis, it is noted that...

Abstract Despite the growing attention on organic electrochemical transistors (OECTs), most research has focused design of p‐type active materials, and number high‐performance n‐type materials is limited. Herein, a series naphthalene diimide‐based polymers incorporated with asymmetrically branched oligo(ethylene glycol) (OEG) side chains are developed to enable green‐solvent‐processed, OECTs. The OEG afford sufficient solubility in eco‐friendly ethanol/water solvent mixtures. Importantly,...

The solid-state properties and FET electrical behavior of several series α,ω- β,β'-fluorocarbon- alkyl-substituted unsubstituted oligothiophenes nTs (n = 2−6) are compared contrasted. thin films were grown by slow vacuum deposition over a range substrate temperatures and/or casting from solution investigated X-ray diffraction scanning electron microscopy. Our results indicate that at 60−80 °C affords with remarkably similar microstructures despite the extensive H → F substitution. Trends in...

New carbonyl-functionalized quaterthiophenes, 5, 5' ''-diheptanoyl-2,2':5',2' ':5' ',2' ''-quaterthiophene (DHCO-4T), ''-diperfluorohexylcarbonyl-2,2':5',2' (DFHCO-4T), and 2,7-[bis-(5-perfluorohexylcarbonylthien-2-yl)]-4H-cyclopenta[2,1-b:3,4-b']-dithiophen-4-one (DFHCO-4TCO) have been synthesized characterized. Field-effect transistors fabricated with these materials exhibit high electron mobilities both in a vacuum (up to 0.6 cm2 V-1 s-1) air 0.02 very Ion:Ioff currents ratios (>107)....

We present here the systematic synthesis and comparative physicochemical characterization of a series regiochemically varied core size extension-modulated arene(perfluoroarene)-thiophene oligomers. The molecules investigated are: 5,5''-diphenyl-2,2':5',2'':5'',2'''-quaterthiophene (1), 5,5'-bis[1-[4-(thien-2-yl)phenyl]]-2,2'-dithiophene (2), 4,4'-bis[5-(2,2'-dithiophenyl)]-biphenyl (3), 5,5''-diperfluorophenyl-2,2':5',2'':5'',2'''-quaterthiophene (4),...

Very thin (2.3-5.5 nm) self-assembled organic dielectric multilayers have been integrated into thin-film transistor structures to achieve sub-1-V operating characteristics. These new dielectrics are fabricated by means of layer-by-layer solution phase deposition molecular silicon precursors, resulting in smooth, nanostructurally well defined, strongly adherent, thermally stable, virtually pinhole-free, organosiloxane films having exceptionally large electrical capacitances (up ≈2,500 nF·cm...

In the present study, a novel polar-solvent vapor annealing (PSVA) was used to induce significant structural rearrangement in poly(3,4-ethylenedioxythiophene):poly(styrene sulfonate) (PEDOT:PSS) films order improve their electrical conductivity and work function. The effects of on PEDOT:PSS were systematically compared with those conventional solvent additive method (SAM) investigated detail by analyzing changes conductivity, morphology, top bottom surface composition, conformational PEDOT...

Ultrathin and dense metal oxide gate di-electric layers are reported by a simple printing of AlOx HfOx sol-gel precursors. Large-area printed indium gallium zinc (IGZO) thin-film transistor arrays, which exhibit mobilities >5 cm(2) V(-1) s(-1) leakage current 10(-9) A cm(-2) at very low operation voltage 2 V, demonstrated continuous bar-coated processes.

Despite the great potential of polymer microfibers in human-friendly wearable electronics, most previous polymeric electronics have been limited to thin-film-based devices due practical difficulties fabricating microfibrillar devices, as well defining active channel dimensions a reproducible manner. Herein, we report on conducting microfiber-based organic electrochemical transistors (OECTs) and their application single-strand fiber-type ion concentration sensors. We developed simple...

Abstract To realize thermoelectric textiles that can convert body heat to electricity, fibers with excellent mechanical and properties are needed. Although poly(3,4‐ethylenedioxythiophene):poly(styrene sulfonate) (PEDOT:PSS) is among the most promising organic materials, reports explore its use for all but absent. Herein, of wet‐spun PEDOT:PSS reported, their in energy‐harvesting discussed. Wet‐spinning into sulfuric acid results water‐stable semicrystalline a Young's modulus up 1.9 GPa, an...