Showing papers by "Jiajie Liang published in 2016"

A Water-Based Silver-Nanowire Screen-Print Ink for the Fabrication of Stretchable Conductors and Wearable Thin-Film Transistors

Abstract: A water-based silver-nanowire (AgNW) ink is formulated for screen printing. Screen-printed AgNW patterns have uniform sharp edges, ≈50 μm resolution, and electrical conductivity as high as 4.67 × 10(4) S cm(-1) . The screen-printed AgNW patterns are used to fabricate a stretchable composite conductor, and a fully printed and intrinsically stretchable thin-film transistor array is also realized.

Flexible and stretchable electrodes for next generation polymer electronics: a review

Abstract: Transparent conductive electrodes play a significant role in the fabrication and development of optoelectronic devices. As next generation optoelectronic devices tend towards mobile and wearable devices, the added attribute of flexibility or stretchability for these electrodes becomes increasingly important. However, mechanical requirements aside, transparent conductive electrodes must still retain high transparency and conductivity, with the metrics for these parameters being compared to the standard, indium tin oxide. In the search to replace indium tin oxide, two materials that have risen to the forefront are carbon nanotubes and silver nanowires due to their high transparency, conductivity, mechanical compliance, and ease of fabrication. This review highlights recent innovations made by our group in electrodes utilizing carbon nanotubes and silver nanowires, in addition to the use of these electrodes in discrete devices and integrated systems.

Elastomeric Light Emitting Polymer Enhanced by Interpenetrating Networks.

Abstract: Conjugated polymers containing long-chain alkyl side groups for solubility are generally unstretchable: large strain induces crack formation, fracture, or plastic deformation. When the polymers are stretched to reorient the conjugated chains along the stretching direction, high dichroic ratio is observed both for absorption of the ground state and radiative decay of the excited state. Here an interpenetrating polymer network (IPN) approach is reported to impart elastomeric deformability to a conjugated polymer. A soluble alkyloxy phenyl substituted poly(1,4-phenylenevinylene) (SY-PPV) with bright yellow fluorescent emission was admixed with an ionically conductive medium containing poly(ethylene oxide), exoxylated trimethylolpropanetriacrylate, and lithium trifluoromethanesulfonate. The spin-cast blend film formed an IPN morphology wherein SY-PPV forms a porous network with pores filled by the ionic medium. PeakForce quantitative nanomechanical mapping showed that the local Young’s modulus was high in the...

Thermally stable silver nanowire transparent electrode

Abstract: A transparent conductive film having a first surface and a second surface, the second surface opposite the first surface; and at least one thermally stable substrate attached to the second surface. The transparent conductive film includes a plurality of thermally stable nanowires embedded within at least one polymer binder, the thermally stable nanowires include metal nanowires, the first surface includes a conductive surface of a plurality of the nanowires, the transparent conductive film has a sheet resistance that degrades by no more than 5% when heated to 300 °C for 1 hour, and the transparent conductive film has a transmittance at a wavelength of 550 nm that decreases by no more than 5% when heated to 300 °C for 1 hour. In one example, silver nanowires are made thermally stable using a thin layer of ZnO deposited using atomic layer deposition.