Thermal treatment effect on structure, electrical conductivity and transient photoconductivity behavior of thiourea modified TiO2 sol–gel thin films

Effect of annealing temperatures on the morphology, optical and electrical properties of TiO2 thin films synthesized by the sol–gel method and deposited on Al/TiO2/SiO2/p-Si

“…The values of the calculated resistivity and conductivity are tabulated in Table 3. It is well known that the electrical conductivity of TiO 2 is affected by oxygen vacancies which are intrinsic for any oxide material and act as electron donors that can influence the n-type TiO 2 conductivity (Pomoni et al 2011). In Table 3, the electrical conductivity increased as following this order: as-deposited <300 °C <500 °C <700 °C <900 °C, indicates that the resistivity of the annealed TiO 2 thin films decreased with increasing annealing temperatures.…”

Enhancing photocatalytic activity of one-dimensional KNbO3 nanowires by Au nanoparticles under ultraviolet and visible-light

“…14 Aiming at utilizing the full solar spectrum in photocatalytic processes, modifications of TiO 2 by doping non metallic species, loading metal nanoparticles (NPs) and developing naturally abundant and environmentally benign alternatives in the nano-regime have seen rapid growth. [14][15][16][17][18][19][20][21][22][23] In particular, gold (Au) NPs are of significance in that Au NPs can absorb visible-light via surface plasmon resonance (SPR) to enhance photocatalytic reactivity. [24][25][26][27] In addition, supported Au NPs can also absorb ultraviolet (UV) via electron interband transitions from 5d to 6sp.…”

Annealing Temperature Effect on the Physical Properties of Titanium Oxide Thin Films Prepared by the Sol-Gel Method

“…Rutile is the most stable form of TiO 2 , whereas anatase and brookite are metastable and transform to the rutile phase upon heating [6,[12][13][14]. Conventional methods to prepare TiO 2 thin films are pulsed laser deposition (PLD) [15,16], RF magnetron sputtering [17][18][19] plasma enhanced chemical vapor deposition [20], and sol-gel methods [6,15,21,22], among others. Focusing on the solgel method, it is one of the most attractive techniques for thin-film deposition, because of low cost, non-vacuum requirements, large area deposition, and low temperature processing.…”

“…Mathpal et al have studied the effect of annealing temperature on the structural and luminescence properties of TiO 2 powders [12]. Another study has investigated the effect of the annealing temperature on TiO 2 thin films, prepared by the sol-gel method and dip-coating techniques [22]. These studies have that the annealing temperature influences the structural and optical properties of TiO 2 thin films.…”