Large area polymer semiconductor sub-microwire arrays by coaxial focused electrohydrodynamic jet printing for high-performance OFETs

Abstract

Large area and highly aligned polymer semiconductor sub-microwires were fabricated using the coaxial focused electrohydrodynamic jet printing technology. As indicated by the results, the sub-microwire arrays have smooth morphology, well reproducibility and controllable with a width of ~110 nm. Analysis shows that the molecular chains inside the sub-microwires mainly exhibited edge-on arrangement and the π-stacking direction (010) of the majority of crystals is parallel to the long axis of the sub-microwires. Sub-microwires based organic field effect transistors showed high mobility with an average of 1.9 cm2 V−1 s−1, approximately 5 times higher than that of thin film based organic field effect transistors. In addition, the number of sub-microwires can be conveniently controlled by the printing technique, which can subsequently concisely control the performance of organic field effect transistors. This work demonstrates that sub-microwires fabricated by the coaxial focused electrohydrodynamic jet printing technology create an alternative path for the applications of high-performance organic flexible device.

Organic thin-film transistors and related devices in life and health monitoring

“…Currently, OTFT-based biosensors have been applied to the real-time recognition of target analytes in the environment, providing a convenient and noninvasive method for rapid and immediate clinical treatment and health monitoring [112][113][114][115][116]. Compared with other sensing methods, OTFT-based biosensor has many advantages: (1) OTFTs are biocompatible for label-free detection with both signal conversion and amplification characteristics, which can cause changes in charge concentration through specific biochemical reactions.…”

Advances in organic semiconductors for photocatalytic hydrogen evolution reaction

“…Organic semiconductors offer excellent structural tunability, which can be used to adjust their absorption spectra and photoelectric properties to enhance photocatalytic hydrogen production efficiency [3][4][5] . Moreover, organic semiconductors exhibit greater processability due to their inherent flexibility 6,7 . Inorganic semiconductors continue to be the most commonly used photocatalysts in the study of photocatalytic water splitting for hydrogen production 8,9 , owing to their advantages, such as higher photoelectric conversion efficiency and better stability 10,11 .…”

“…[3][4][5] Moreover, organic semiconductors exhibit greater processability due to their inherent flexibility. 6,7 Inorganic semiconductors continue to be the most commonly used photocatalysts in the study of photocatalytic water splitting for hydrogen production, 8,9 owing to their advantages such as higher photoelectric conversion efficiency and better stability. 10,11 For instance, the external quantum efficiency of aluminum-doped SrTiO 3 at the ultraviolet wavelength (350-360 nm) is 96%.…”

Fabrication of a Polymer Nano Nozzle for Electrohydrodynamic Small-Molecule Solvent Inkjet Printing

“…Electrohydrodynamic jet (E-jet) printing, compared to other methods for fabricating nanoscale structures such as electron-beam lithography, , nanoimprint lithography, , direct laser writing, , and similar methods, − offers a mask-free, cost-effective, and digital method for mass production of functional patterns − and has been successfully employed in the field of solar cells, field-effect transistors, , flexible electronics, , and bioengineering. , In E-jet printing, functional materials in the form of ink are ejected onto the collecting substrate by electric force to obtain the desired patterns. However, a lot of functional inks employ low-viscosity, small-molecule liquids as solvents such as semiconductor materials PVDT-10 dissolved in anhydrous o -dichlorobenzene, perovskite materials CH 3 NH 3 PbI 3 dissolved in isopropyl alcohol (IPA), and silver nanoparticles dispersed in n -tetradecane . The considerable spreading of these low-viscosity, small-molecule inks limits the application of E-jet printing particularly when the feature sizes of the desired patterns are down to the nanoscale.…”

“…19,20 In E-jet printing, functional materials in the form of ink are ejected onto the collecting substrate by electric force to obtain the desired patterns. However, a lot of functional inks employ low-viscosity, small-molecule liquids as solvents such as semiconductor materials PVDT-10 dissolved in anhydrous o-dichlorobenzene, 21 perovskite materials CH 3 NH 3 PbI 3 dissolved in isopropyl alcohol (IPA), 22 and silver nanoparticles dispersed in n-tetradecane. 23 The considerable spreading of these low-viscosity, small-molecule inks limits the application of E-jet printing particularly when the feature sizes of the desired patterns are down to the nanoscale.…”