Abstract
Thin films of Tin dioxide (SnO2 ) thin films are a special class of metal oxides that combine high electrical conductivity with optical transparency. Such Transparent Conducing Oxide (TCO) provides an important component for optoelectronic applications. Spray pyrolysis deposition for thin film preparation is a simple and relatively cost effective technique. This work consists of the synthesis of thin films of tin dioxide using automated spray pyrolysis technique and its structural characterization. Tin oxide films were prepared from different concentrations of the precursor solution. These films were found to be transparent at low concentration of the precursor solution. Characterization of these prepared films using X-ray diffraction technique is presented and discussed. Spray deposited thin films of tin dioxide have a number of applications, mainly as electrode materials in solar cells.Keywords: Transparent Conducting Oxide, Physical Vapour Deposition, Chemica Vapour Deposition, Transparent Conducting Oxides, Atomic Layer Epitaxy.
Highlights
The application of thin films in technology is widespread
Spray pyrolysis is being used for several decades in the glass industry and in solar cell production [1]
An aqueous solution of SnCl4·5H2O as the precursor solution was used for spray pyrolysis in the present investigation
Summary
The application of thin films in technology is widespread. The methodology employed for thin-film deposition based on the deposition process can be divided into two groups viz., physical or chemical. In practice, deposited tin oxide layers contain a reasonable number of oxygen vacancies, making electrons available for conduction. Though a number of tin salts are available for this purpose, the most suitable is one whose decomposition temperature is not very high, the decomposition reaction leading to the formation of SnO2 is thermodynamically feasible, and no residue of the reactants is left behind in the deposited material. Keeping these in sight, an aqueous solution of SnCl4·5H2O as the precursor solution was used for spray pyrolysis in the present investigation. The synthesis and characterization of tin oxide thin films is reported
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