Silver Nanowire/Colorless-Polyimide Composite Electrode: Application in Flexible and Transparent Resistive Switching Memory

Abstract

Improving the performance of resistive switching memories, while providing high transparency and excellent mechanical stability, has been of great interest because of the emerging need for electronic wearable devices. However, it remains a great challenge to fabricate fully flexible and transparent resistive switching memories because not enough research on flexible and transparent electrodes, for their application in resistive switching memories, has been conducted. Therefore, it has not been possible to obtain a nonvolatile memory with commercial applications. Recently, an electrode composed of a networked structure of Ag nanowires (AgNWs) embedded in a polymer, such as colorless polyimide (cPI), has been attracting increasing attention because of its high electrical, optical, and mechanical stability. However, for an intended use as a transparent electrode and substrate for resistive switching memories, it still has the crucial disadvantage of having a limited surface coverage of conductive pathways. Here, we introduce a novel approach to obtain a AgNWs/cPI composite electrode with a high figure-of-merit, mechanical stability, surface smoothness, and abundant surface coverage of conductive networks. By employing the fabricated electrodes, a flexible and transparent resistive memory could be successfully fabricated.

Van der Waals heteroepitaxial AZO/NiO/AZO/muscovite (ANA/muscovite) transparent flexible memristor

“…Thus, it has attracted significant attention from both academic and industrial communities [1] , [2]. Along with this research direction, transparent flexible devices, including transistors [3][4][5][6][7], photodetectors [8,9], displays [10][11][12], sensors [13][14][15], triboelectric nanogenerator [16,17] and nonvolatile memory devices [18] , [19,20] have played a critical role in various types of smart electronic applications. Among them, memristors or resistive switching memories [21][22][23] can store and process information by recording changes of resistance states under an external electric field.…”

Enhanced Thermal Conductivity of Polyimide Composites with Boron Nitride Nanosheets

“…Polymers such as polyimide (PI) has been widely used as an electronic packaging material due to good thermal and mechanical properties 6 , 7 . In particular, it possesses a low dielectric constant, low loss tangent, high thermal stability and high storage modulus 8 . However, PI exhibit a poor thermal conductivity in the order of 0.1 W/mK 9 – 11 , which cannot meet the requirement of fast heat conduction for the advanced electronic devices.…”

Extraction of Light Using Random Nanocone on Poly(vinyl-butyral) for Flexible OLEDs

“…These electrodes exhibited extremely low roughness, low R s , and high transmittance. Due to such superior performance, the embedded AgNW was used in various applications, such as resistive random-access memory 21 , electroluminescence devices 22,23 , and OLEDs in our former research 24 .…”