A sight of view on electrical impacts, structural properties and surface roughness of tungsten trioxide thin film: effect of substrate temperatures in WO₃/Si device fabrication

Abstract

Monoclinic WO3 thin films have been effectively deposited by a simple spray pyrolysis technique at a molar concentration of 0.01 M on a glass substrate in the temperature range of 473 to 673 K. These WO3 films were used as an interlayer between the metal and the semiconductor, which formed the basic structure of the photodetector. Effect of substrate temperature on WO3 films during the process of the deposition was systematically interpreted with respect to the structural, morphological, optical and electrical properties of the WO3 films. The X-ray diffraction pattern revealed the polycrystalline nature of the prepared films with monoclinic phases. At the substrate temperature of 623 K, the nano-thin films were strongly bonded to each other as observed from the FE-SEM images. Visible and ultraviolet spectroscopies indicated the band gap (Eg) of the WO3 thin film is 3.30 eV. The dc electrical study recorded a sharp increase in the electrical conductivity of the prepared film at substrate temperature of 623 K for tungsten trioxide. It is worth noting that all diodes showed a positive photoresponse under illumination. In particular, the photodetector with the thickness of 300 nm showed higher responsivity 0.02 A/W and detection specificity 8.29 x 1010 Jones.

Influence of nano-hydroxyapatite particles on the mechanical and antibacterial properties of polycarbonate films

“…The influence of weathering, particularly ultraviolet (UV) upon the non-equilibrium PC was well recognized [7]. The characteristic signs of the PC worsening include the embrittlement, discoloration, and toughness loss of polymer [8,9] and the main reactions responsible for the photo-oxidation, photo degradation procedure, and photo-fries reaction [10] were broadly investigated [11,12].…”

Preparation of LiNbO3 nanoparticles by green synthesis laser ablation in water

“…where hν is the incident light photon energy, A is a constant, and α is the absorption coefficient. The optical bandgap energy was determined by plotting (hν) 2 versus (hν) [61][62][63][64][65][66][67][68][69][70][71][72], as illustrated in figure 5(b). The extrapolation of the linear section of the curve to the (αhν) 2 = 0 point gives the bandgap energy, which is found to be in the range of (4.25-4.9) eV depending on the laser fluence.…”

Physical Investigations of In2O3/Porous Silicon at Different Laser Wavelengths

“…A good electrical conductor, In2O3 is a translucent, yellowcolored powder with a high electrical conductivity [5,6]. Its great stability and durability make it a perfect choice for usage in difficult conditions [7,8].…”