An ultra-long and low junction-resistance Ag transparent electrode by electrospun nanofibers

Shin

et al. 2018

Sci Rep

Transparent conducting electrodes (TCE) are widely used in a variety of applications including displays, light-emitting diodes (LEDS), and solar cells. An important factor in TCE design is active control of the sheet resistance and transparency; as these are inversely proportional, it is essential to develop a technology that can maintain high transparency, while actively controlling sheet resistance, for a range of applications. Here, a nanofiber network was fabricated based on direct electrospinning onto a three-dimensional (3-D) complex substrate; flat metal electrodes without junction resistance were produced using heat treatment and electroless deposition. The fabricated transparent electrode exhibited a transparency of over 90% over the entire visible light range and a sheet resistance of 4.9 ohms/sq. Adhesion between the electrode and substrate was superior to other electrospinning-based transparent electrodes. The performance of the transparent electrode was verified by measurements taken while using the electrode as a heater; a maximum temperature of 210 °C was achieved. The proposed copper nanofiber-based heater electrode offers the advantages of transparency as well as application to complex 3-D surfaces.

Section: Introductionmentioning

confidence: 99%

Junction-free Flat Copper Nanofiber Network-based Transparent Heater with High Transparency, High Conductivity, and High Temperature

Shin

et al. 2018

Sci Rep

“…Therefore, a good balance between sheet resistance and transparency should be achieved. The figure of merit (ΦTC) can be used for this purpose [33][34][35][36][37]. In this study, the highest figure of merit was achieved for the samples deposited for 3 minutes indicating that they have better optoelectrical properties than the other samples ( Figure 4, Table 1).…”

Section: Resultsmentioning

confidence: 64%

Effect of Deposition Time on the Optoelectrical Properties of Electrospun Pan/Agno3 Nanofibers

Düzyer

CUNAYEV²

2020

Tekstil Ve Konfeksiyon

The aim of this study is to produce optically transparent nanofibers with adequate electrical conductivity for optoelectrical applications where transparency and conductivity are needed. Therefore, conductive polyacrylonitrile/silver nitrate (PAN/AgNO3) nanofibers were produced by electrospinning with different deposition times ranging from 1 minute to 10 minutes. The effect of deposition time on the sheet resistance and optical transparency of the nanofibers were investigated. The surface characteristics, electrical properties and transmittance values of the electrospun mats were evaluated. Nanofibers with diameters under 700 nm were obtained. With the increasing deposition time, the sheet resistance and transparency of the samples were decreased. In order to figure out the optimum deposition time, the figures of merit of the samples were calculated. The figures of merit of the samples showed that the sample deposited for three minutes gave the best performance among the others. It was seen that conductive PAN/AgNO3 nanofibers are promising for optoelectrical applications.

“…2c ; this is why all IGZO nanowires for multi-layered structures and sensing applications were fabricated at a spin-coating speed of 7,000 rpm. Meanwhile, degradation of the electrical characteristics of conventional nanowire-based devices fabricated by deposition of pre-synthesized nanowires is inevitable problem due to the existence of contact resistance at the junctions between the pre-synthesized nanowires 26 , 27 . However, the wire-type IGZO TFTs fabricated in the present study were little affected by contact resistance because each wire-type IGZO layer was fabricated via one-step deposition of IGZO, minimizing the number of junctions.…”

Section: Resultsmentioning

confidence: 99%

Facile fabrication of wire-type indium gallium zinc oxide thin-film transistors applicable to ultrasensitive flexible sensors

Tak

et al. 2018

Sci Rep

We fabricated wire-type indium gallium zinc oxide (IGZO) thin-film transistors (TFTs) using a self-formed cracked template based on a lift-off process. The electrical characteristics of wire-type IGZO TFTs could be controlled by changing the width and density of IGZO wires through varying the coating conditions of template solution or multi-stacking additional layers. The fabricated wire-type devices were applied to sensors after functionalizing the surface. The wire-type pH sensor showed a sensitivity of 45.4 mV/pH, and this value was an improved sensitivity compared with that of the film-type device (27.6 mV/pH). Similarly, when the wire-type device was used as a glucose sensor, it showed more variation in electrical characteristics than the film-type device. The improved sensing properties resulted from the large surface area of the wire-type device compared with that of the film-type device. In addition, we fabricated wire-type IGZO TFTs on flexible substrates and confirmed that such structures were very resistant to mechanical stresses at a bending radius of 10 mm.