Preparation and characterization of cross-linked poly (vinyl alcohol)-graphene oxide nanocomposites as an interlayer for Schottky barrier diodes

Abstract

Cross-linked polyvinyl alcohol (PVA) graphene oxide (GO) nanocomposites were prepared by simple solution-mixing route and characterized by Raman, UV–visible and fourier transform infrared (FT-IR) spectroscopy analysis, X-ray diffraction (XRD) and scanning electron microscopy (SEM) techniques. The XRD pattern and SEM analysis showed significant changes in the nanocomposite structures, and the FT-IR spectroscopy results confirmed the chemical interaction between the GO filler and the PVA matrix. After these morphological characterizations, PVA-GO-based diodes were fabricated and their electrical properties were characterized using current–voltage (I–V) and impedance-voltage-frequency (Z-V-f) measurements at room temperature. Semilogarithmic I–V characteristics of diode showed a good rectifier behavior. The values of C and G/[Formula: see text] increased with decreasing frequency due to the surface/interface states (N[Formula: see text]) which depend on the relaxation time and the frequency of the signal. The voltage, dependent profiles of N[Formula: see text] and series resistance (R[Formula: see text]) were obtained from the methods of high-low frequency capacitance and Nicollian and Brews, respectively. The obtained values of N[Formula: see text] and R[Formula: see text] were attributed to the use of cross-linked PVA-GO interlayer at the Au/n-Si interface.

Effect of sulphidation process on the structure, morphology and optical properties of GO/AgNWs composites

“…[1][2][3][4][5] These materials can be applied in various devices and systems, each exhibiting superior characteristics. [6][7][8][9][10][11][12][13][14] However, challenges are associated with these materials. Specically, AgNWs possess high chemical reactivity and are prone to oxidation, while the abundance of touchpoints in AgNWs leads to a decrease in conductivity.…”

Preparation of anisotropic AgNWs/PVA/Ag2S nanocomposites via a vapor-phase sulfidation process

“…Thus, PVA has many applications in terms of its biocompatibility, high dielectric properties, transparency, and easy solubility in water. [13][14][15][16][17] Also, studies show that the sheet resistance and optical transmittance of AgNWs/PVA nanocomposites can be changed by controlling the distribution density of AgNWs within the composite. 18,19 Ag 2 S/PVA nanocomposites are interesting composites.…”

A dually emissive MPA-CdTe QDs@N, S-GQD nanosensor for sensitive and selective detection of 4-nitrophenol using two turn-off signals

“…13 GQDs, an emerging metal-free carbon material, offer special optical properties along with the advantages of green synthesis and ultralow toxicity. [14][15][16][17] Recent reports have utilized nanodots such as polyethyleneimine-capped carbon dots, 18 APTES-coated zinc oxide QDs, 3 nitrogen-doped CQDs, 2 and sulfur-doped CQDs 19 for the detection of 4-NP.…”