Nickel Doped Zinc Oxide Thin Films for Visible Blind Ultraviolet Photodetection Applications

Abstract

The current research aims to investigate the effect of nickel doping on the structural and opto-electrical characteristics of zinc oxide thin films. Sol-gel spin coating technique has been utilized to deposit Zn1-xNixO (x=0, 0.005, 0.010, and 0.015) films on glass substrates. X-ray diffraction (XRD) analysis confirms the formation of crystalline zinc oxide thin films with hexagonal wurtzite structure. Williamson-Hall analysis has been performed to study the individual contribution of lattice strain and crystallite size to the peak broadening in the XRD pattern. Scanning electron microscopy (SEM) and UV-Visible spectroscopic techniques have been used to examine the surface morphology and optical properties of the deposited films. Transient photocurrent measurements have been performed on all the films under the exposure of ultraviolet (UV) light of wavelengths 365 and 254 nm with on/off cycle of 100 seconds, and various device key parameters such as sensitivity, responsivity and quantum efficiency, etc. have been determined. Sensitivities of the fabricated photodetectors (PDs) are found to be 5463%, 3809%, 3100%, and 831% for pristine ZnO, Zn0.995Ni0.005O, Zn0.99Ni0.01O, and Zn0.985Ni0.015O, respectively. The UV photodetection mechanism, which is based on the interaction between chemisorbed oxygen on the surface of ZnO and photo-generated holes, has been thoroughly discussed.

Polypyrrole-Ag/AgCl Nanocomposite-Enabled Exhaled Breath-Acetone Monitoring Non-Invasive Biosensor for Diabetes Diagnostics

“…Fabrication of ternary NC-based chemiresistor.-In this study, pristine PPy was prepared by the typical oxidative polymerization method, 31,35 in which 0.1 M pyrrole is polymerized using 0.3 M silver nitrate AgNO3 without any dopant. For NC, a typical one-pot chemical polymerization route 25 was adopted in which 0.1 M pyrrole was oxidized by 0.3 M of AgNO3 in the presence of 1 M HCl as a dopant.…”

Effect of copper doping on the photocatalytic performance of Ni2O3@PC membrane composites in norfloxacin degradation

“…[31][32][33] Incorporation of metallic nanoparticles on the surface of Ni substrate has been shown to enhance storage capacity, charge separation, and photocatalytic activity of the resulting heterostructures. [34][35][36][37] In this study, we present the galvanic replacement of initially electrolessly deposited Ni 2 O 3 microtubes (MTs) within the pores of polycarbonate (PC) track-etched membranes (TeMs) with NiCu MTs. The application of polymeric TeMs as a support for composites synthesis has proven effective in producing highly efficient membrane catalysts for the removal of different classes of contaminants.…”

“…31–33 Incorporation of metallic nanoparticles on the surface of Ni substrate has been shown to enhance storage capacity, charge separation, and photocatalytic activity of the resulting heterostructures. 34–37…”

Exploring the Influence of Temperature and Time on the Formation and Properties of 3D Flower-Like MoS2 Nanostructures Synthesized via Hydrothermal Method

“…[1][2][3][4][5][6] These materials, including MoS 2 , WS 2 , MoSe 2 , VS 2, WSe 2 and many more, have shown great potentials for use in various applications, such as electronic devices, gas sensing devices, energy storage devices, hydrogen evolution reactions, solar cells, lubricants, etc. 2,[7][8][9][10][11][12][13][14] MoS 2 , as one of the representative members of TMDs, is a well-known two-dimensional (2D) material. Like graphene, MoS 2 consists of a layered structure in which a layer of molybdenum atoms is sandwiched between two layers of hexagonally packed sulphur atoms with strong covalent bonds (S-Mo-S).…”