Physical properties of ultrasonic sprayed nanosized indium doped SnO2 films

Thin films of undoped and tungsten (W) doped SnO 2 have been synthesized on a glass (ITO) substrate using a simple chemical bath deposition technique. The asdeposited films were annealed at 500°C for 5 h in ambient atmosphere in order to improve the structural perfections and crystallinity. X-ray diffraction studies showed that the W: SnO 2 films were polycrystalline in nature with tetragonal rutile type structure of SnO 2 phase. The surface roughness and porosity have been found to decrease from 47 to 39 nm with the increase of dopant concentration as investigated by atomic force microscopy. The optical absorption edge was found to be 3.46 eV, while the higher concentration of W doped films shifted towards lower energy (red shift) in the range of 3.35 eV. The effect of W on impurity, defect states and oxygen vacancy of the SnO 2 film was analyzed by photoluminescence spectra. The photocatalytic activities of the films were evaluated by the degradation of methylene blue (MB) rhodamine B (RHB) in an aqueous solution under visible light irradiation. The photocatalytic activity and reusability of W (10 wt%) doped SnO 2 films were much higher than that of the pure SnO 2 . The improvement mechanism of RHB by W-SnO 2 catalyst was also discussed.

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“…ion is substituted in SnO 2 host lattice. Similar findings were also reported by many researchers [17][18][19].…”

Section: Uv-vis Transmissions Spectra Analysissupporting

confidence: 92%

Effect of W doping on structural, optical and photocatalytic activity of SnO2 nanostructure thin films

Vadivel¹,

Rajarajan²

2015

J Mater Sci: Mater Electron

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“…The variation of dislocation density depended on aluminum content. The texture coefficient expressed as TC = I 2 0 0 / [(I 2 0 0 + I 2 1 1 + I 1 0 1 )/3] [2] was sketched in Fig. 4C according to (2 0 0) and (2 1 1) orientations.…”

Section: Al Level (%)mentioning

confidence: 99%

“…Tin oxide (SnO 2 ) has recently become one of the most studied materials in technology research, due to its various properties such as high transparency in visible range, high reflectivity in the infrared [1], direct band gap around 3.5 eV, and high exciton binding energy at room temperature (130 meV) [2]. It is well known that SnO 2 is a semiconductor that crystallizes in a tetragonal rutile structure [3].…”

Section: Introductionmentioning

confidence: 99%

“…It is well known that SnO 2 is a semiconductor that crystallizes in a tetragonal rutile structure [3]. SnO 2 films were grown by various processes like chemical precipitation route [4], chemical vapor deposition (CVD) [5], sputtering [6,7], sol-gel [8], pulsed laser deposition (PLD) [9], and spray pyrolysis deposition (SPD) [2,10,11]. This latter is a chemical deposition technique in which fine droplets of a solution containing desired species are sprayed on a preheated substrate.…”

Section: Introductionmentioning

confidence: 99%

“…SnO 2 is extensively used for a variety of applications including architectural windows, flat panel displays, smart windows, and film photovoltaic and polymer-based electronics [14]. Elements such as F, Cl, Sb, Br, Ni, Cu, Fe [12], Al [1], Co [15], and In [2], have been used as dopants for SnO 2 . Tin oxide was grown on different substrates such as indium tin oxide (ITO) and silicon [16,17].…”

Section: Introductionmentioning

confidence: 99%

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