Toward Finding a Commercial Method for Deposition of Nanostructured SnO₂Thin Films

Abstract

Nanostructured tin oxide (SnO2) thin lms have been prepared by spray pyrolysis technique. The eects of deposition conditions such as substrate temperature and tin chloride concentration in the precursor solution on physical properties of lms have been investigated. The physical characterization of samples was carried out by UV-VIS spectroscopy, X-ray diraction, scanning electron microscopy, and the Hall eect experiment for optical, structural, morphological and electrical studies, respectively. The lms are polycrystalline in nature with a tetragonal crystal structure. The preferred orientation has been changed by changing the deposition parameters. In the case of changing the substrate temperature, (211) was found as the preferred orientation, while by changing the molarities of the solution, (301) orientation was grown as well as (211). The deposition temperature was optimized to 450• C; whereas the optimum solution concentration was found to be 0.2 mol/L. Films deposited at foregoing conditions have good optoelectrical properties which make them suitable for applying in dierent optoelectronic devices.

Controlled optoelectronic properties and abrupt change in photosensitivity by suppressing density of oxygen vacancies in SnO2 nanocrystalline thin films prepared at various spray-deposition temperatures

“…These observations are well consistent with those reported previously by Joseph et al [33] but contradictory to the results that have been reported by Memarian et al [32] and Maleki et al [34]. Conversely, lower deposition temperature implies higher density of grain boundaries and consequent higher concentration of structural defects such as point defects (e.g.…”

“…[37,38]), but it is inconsistent with other published works (e.g. [32,39,40]). However, the preferred growth orientation is significantly controlled by the deposition parameters (deposition temperature [41], film thickness [42], doping concentration [40], etc).…”

“…Effect of oxygen vacancies within SnO 2 thin films can be controlled by varying the deposition temperature. This effect has been widely adopted to understand electrical transport and optical properties of the TCOs [31][32][33][34].…”

Optoelectronic properties of SnO 2 thin films sprayed at different deposition times

“…The sheet resistances of our films are between 205.27 Ω and 325.25 Ω, which are consistent with the reported values of sheet resistance obtained for SnO 2 prepared by spray pyrolysis technique. [35] The resistivity values of SnO 2 films are calculated from the following formula:…”

Optical Transmittance, Electrical Resistivity and Microstructural Characteristics of Undoped and Fluorine-doped Tin Oxide Conductive Glass Fabricated by Spray Pyrolysis Technique with Modified Ultrasonic Nebulizer

“…The second solution (doped) uses the initial composition of the first solution with the added doping of as much as 2 wt% fluor (F) by dissolving 0.24 grams of NH 4 F with 0.56 ml of distilled water. This solution was dropped carefully by using a pipette to prevent solution turbid (Memarian & Rozati, 2012). …”