High-Voltage, High-Current Electrical Switching Discharge Synthesis of ZnO Nanorods: A New Method toward Rapid and Highly Tunable Synthesis of Oxide Semiconductors in Open Air and Water for Optoelectronic Applications

Abstract

A novel method of oxide semiconductor nanoparticle synthesis is proposed based on high-voltage, high-current electrical switching discharge (HVHC-ESD). Through a subsecond discharge in the HVHC-ESD method, we successfully synthesized zinc oxide (ZnO) nanorods. Crystallography and optical and electrical analyses approve the high crystal-quality and outstanding optoelectronic characteristics of our synthesized ZnO. The HVHC-ESD method enables the synthesis of ZnO nanorods with ultraviolet (UV) and visible emissions. To demonstrate the effectiveness of our prepared materials, we also fabricated two UV photodetectors based on the ZnO nanorods synthesized using the subsecond HVHC-ESD method. The UV-photodetector test under dark and UV light irradiation also had a promising result with a linear ohmic current−voltage output. In addition to the HVHC-ESD method's excellent tunability for ZnO properties, this method enables the rapid synthesis of ZnO nanorods in open air and water. The results demonstrate the preparation, highlight the synthesis of fine hexagonal-shaped nanorods under a second with controlled oxygen vacancies, and point defects for a wide range of applications in less than a second.

P-Type α-CuGaO2 Electronics: A Study on Gap States and Fermi Level Pinning and a Solution to Schottky to Ohmic Transition for Electronic Applications

“…This low reverse saturation dark current, which is caused by the Schottky barrier, elevates the detectivity of the device far higher than the Ohmic one. Due to the barrier elimination in the Ohmic device, there is always a residual current in the dark mode, which causes a large dark current in the device . This dark current causes high noise equivalent power (NEP), and the specific detectivity falls to around 10 10 Jones.…”

“…Due to the barrier elimination in the Ohmic device, there is always a residual current in the dark mode, which causes a large dark current in the device. 47 This dark current causes high noise equivalent power (NEP), and the specific detectivity falls to around 10 10 Jones. This is typical in photoconductors, which usually suffer from high noise.…”

Synthesis and Antimicrobial Applications of ZnO Nanostructures: A Review

“…The need for more efficient synthetic processes in nanomaterial development has led to the coupling of multiple techniques for their preparation. 91 For example, microwaves 92 or even microplasmas 93 have been proposed to enhance electrochemical processes, providing both high-temperature reaction conditions (generated locally at the electrode− solution interface) and fast transient changes in temperature when microwave pulses are applied. 92 A successful example is also provided by the combination of sonochemistry and electrochemistry.…”

Synthesis and characterization of linear/nonlinear optical properties of graphene oxide and reduced graphene oxide-based zinc oxide nanocomposite

“…Recently, they have attracted significant attention because of their wide utilization in catalysis, water purification, hydrogen production, lithium-ion batteries, and transparent electronics 34 – 39 . For example, Zinc oxide (ZnO) is an inorganic metal oxide with a wide band gap of 3.37 eV 40 , 41 and a large exciton binding energy at room temperature (60 meV) has diverse potential applications such as light emitting diodes 42 , solar cells 43 – 46 , sensors 47 – 49 , photodetectors 50 , and nanogenerators 1 , 5 . Consequently, according to the super individual properties of graphene and ZnO, combining graphene with ZnO nanoparticles can enhance performances 1 .…”