p-TYPE CuO NANOWIRE PHOTODETECTORS
نویسندگان
چکیده
Nanowires (NWs) have a great potential as building blocks of optical sensors due to their high crystal quality and surface-to-volume ratio which typically lead to high optical gains [1,2]. Metal oxide NW based photodetectors have demonstrated response values well beyond the values achieved in mesoscopic devices. Most of these metal oxides are n-type and, despite their high optical response, present slow response transients due to the chemisorption of gas molecules (particularly oxygen) that hinder his practical operation. Up to now, p-type nanowires have been less studied. In that respect, cupric oxide (CuO) NWs are excellent candidates to analyze because of their high aspect ratio and high conductivity when they are synthesized by oxidizing copper foils. In addition, its optical bandgap (~1.4 eV) [2] lies in the infrared range allowing detection in the full visible spectrum.
منابع مشابه
Multifunctional CuO nanowire devices: p-type field effect transistors and CO gas sensors.
We report the properties of a field effect transistor (FET) and a gas sensor based on CuO nanowires. CuO nanowire FETs exhibit p-type behavior. Large-scale p-type CuO nanowire thin-film transistors (10(4) devices in a 25 mm(2) area) are fabricated and we effectively demonstrate their enhanced performance. Furthermore, CuO nanowire exhibits high and fast response to CO gas at 200 degrees C, whic...
متن کاملTransport, Analyte Detection, and Opto-Electronic Response of p-Type CuO Nanowires
In this article, we introduce and provide details on a large-scale, cost-effective pathway to fabricating ultrahigh dense CuO nanowire arrays by thermal oxidation of Cu substrates in oxygen ambient. The CuO nanowires that are produced at ∼500 °C for ∼150 min feature an average length and diameter of ∼15 μm and ∼200 nm, respectively. The room temperature device-related characteristics such as tr...
متن کاملElectro-optical characterisation of InP nanowire based p-n, p-i-n Infrared photodetectors
High speed photodetectors are most sophisticated optoelectronic devices, because it has high photo sensitivity, low noise, high conversion efficiency and allow a large wavelength range of detection from 750 nm to 1.3–1.55 μm in the optical communication system. These photodetector is used as an optical receiver which transforms the energy of optical radiation such as infrared, visible or ultrav...
متن کاملUltrahigh quantum efficiency of CuO nanoparticle decorated In2Ge2O7 nanobelt deep-ultraviolet photodetectors.
Although there has been significant progress in the fabrication and performance optimization of 1-D nanostructure-based deep-ultraviolet photodetectors, it is still a challenge to develop an effective device with high performance characteristics, such as high photocurrent-dark current ratio and high quantum efficiency. Herein, an efficient and simple method to fabricate high performance CuO nan...
متن کاملAn improved sensitivity non-enzymatic glucose sensor based on a CuO nanowire modified Cu electrode.
CuO nanowires have been prepared and applied for the fabrication of glucose sensors with highly enhanced sensitivity. Cu(OH)(2) nanowires were initially synthesised by a simple and fast procedure, CuO nanowires were then formed simply by removing the water through heat treatment. The structures and morphologies of Cu(OH)(2) and CuO nanowires were characterised by X-ray diffraction, X-ray photoe...
متن کامل