Characterization of CdZnO/Si heterojunction photodiode prepared by pulsed laser deposition

Abstract

The Cd[Formula: see text]Zn[Formula: see text]O thin films have been deposited on glass and Si substrates at room-temperature with different Cd contents (x = 0, 2%, 4% and 6 wt.%) by pulsed laser deposition (PLD) technique. X-ray diffraction (XRD) analyses evidenced that the films possess polycrystalline and a hexagonal ZnO crystal structure for x = 0, 2% and 4% with a preferred orientation in the a-axis (101) direction, while films with a mixed hexagonal and cubic structure was revealed for x = 6 wt.%. Electrical measurement presented that the resistivity decreased with increased temperature and concentration of Cd. The deliberated activation energy was reduced was from 0.224 to 0.113 eV with increase doping concentration. Current–voltage (I–V) and capacitance–voltage (C–V) characteristics of the fabricated Cd[Formula: see text]Zn[Formula: see text]O/p-Si heterojunction varied with the applied bias and the Cd concentration. The results of the values of built-in potential (V[Formula: see text]) and the ideality factor (n) increased with raising Cd concentration.

Antibacterial Activity of TiO2 Nanoparticles Prepared by One-Step Laser Ablation in Liquid

“…Figure 2a showed an absorption peak in the UV region, at around 360 nm, resulting from band-to-band electrons transitions of TiO 2 . It also depicted a smooth decay at longer wavelengths [5,27]. Moreover, there are many parameters that affected the absorption behavior of TiO 2 NPs such as stoichiometry, morphologies, and size distribution [28].…”

“…Reducing the dimensions of certain materials, such as metal oxide semiconductors, to the nanoscale size could result in a wholly new material that has optical and/or electronic properties different from its bulk material. This enables scientists to explore the benefits of nanomaterials in a wide range of scientific fields such as biomedicine, optoelectronics, and the environment [1][2][3][4][5][6]. TiO 2 nanoparticles (TiO 2 NPs), among other metal oxide semiconductors such as ZnO, MgO, CuO, and Fe 2 O 3 , are considered to be the material of choice in biological and environmental remediation applications due to their abundance, low cost, high surfacearea-to-volume ratio, non-toxicity, and unique physiochemical properties.…”

Photodetector Based on Titanium Oxide Nanoparticles Produced via Pulsed Laser Ablation

“…Moreover, due to high-density conditions, this method provides manufacturing of unique materials which are inaccessible using traditional methods [8,9,12]. erefore, many researchers have utilized the production of nanoparticles such as metal oxide, nitride, carbon, metal, and metal carbide via laser ablation in liquid [25][26][27][28][29]. In this research, we prepare TiO 2 NPs using pulsed (ns) laser ablation in solution and investigate the optoelectronic features.…”

“…For example, Fadhil et al[6] prepared CuO NPs with a size change from 10 nm to 100 nm; Khashan and Abbas[19] used the same technique to create spherical-shaped Indium nitride (InN) nanoparticles with particle sizes in the range of 2-20 nm; as well as Khashan and Mahdi[21] to create ZnMgO nanocomposites with a flower-like hierarchical structure and a full array of about 2 μm. While, Hameed et al[24] generated carbon nanoparticles separated long multiwall carbon nanotubes (MWCNT) with hollow core in different dimensions, larger in diameter (66-75) nm and other sizing about(25)(26)(27)(28)(29)(30) nm. Khashan el al [29].…”