Biswas, Prasanta Kumar and Dua, L and De, A and Chaudhuri, T (2006) Aquo-organic sol-based F-doped SnO2 (Sn : F=90 : 10) coatings on glass. Materials Science-Poland , 24 (2). 367 -374. ISSN 0137-1339

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An aqueous precursor of F-doped SnO2 was prepared starting with hydrated Sri (IV) chloride, ammonium fluoride and water. Polyvinyl alcohol (mol. wt. 22 000), a sol stabilizer, was used for better adherence to the glass substrate. Both the dipping and the spinning techniques were used to deposit layers of different thickness (from 200 to 650 +/- 10 nm). Air drying and subsequent curing at ca. 450 degrees C in air yielded a tetragonal cassiterite phase of SnO2 and a tetragonal Sri phase. The percentage of visible transmission of the spincoated samples was relatively high (ca. 80%). Incorporation of polyvinyl alcohol into the aqueous precursor minimized etching by fluoride ions, as revealed by SEM pictures. The surfaces of the developed films seemed to be porous, and the spin-coated sample was relatively less porous. The refractive index (RI) of the dip-coated samples was in the range 1.650-1.803, while the spin-coated samples had RI values in the range 1.670-1.823. The sheet resistance of the spin-coated films was in the range 3.3-1300 k Omega/rectangle, and 1.4-2500 k Omega/rectangle in the case of dip coated samples

Item Type: Article
Uncontrolled Keywords: fluorine-doped tin oxide; sol-gel; SEM; polyvinyl alcohol
Subjects: Microstructure and Characterization
Divisions: Sol Gel
Depositing User: Mrs Chandana Patra
Date Deposited: 01 Feb 2012 12:20
Last Modified: 05 Apr 2016 09:11

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