What is it about?
The development of a new tin dioxide (SnO2) material that underwent pressure-assisted thermal treatment (PAHT) showed, via Raman and photoacoustic spectroscopy: altered stoichiometry, interaction of the film with the substrate, and increased optical properties.
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Why is it important?
The optimal preparation condition found for samples deposited in five layers with PAHT considers the manufacture of several types of optoelectronic and spintronics devices. PAHT presented itself as an innovative treatment, using temperatures below those used in conventional treatments, which makes it possible to get devices with reduced costs. Besides, the average effective thermal diffusivity value measured by the two-beam phase-lag method was α = (0.017±0.001) cm²/s, and it is found in the literature for pure SnO2. In this context, this average value found here was cataloged as the thermal diffusivity of tin dioxide, by other authors, in Appl. Phys. Rev. 9, 011315 (2022); https://doi.org/10.1063/5.0078037
Perspectives
Based on the results found, can be produced a new material with film interaction on the substrate and with increased optical properties. PAHT treatment can vary the amount of oxygen adsorbed in SnO2 films, changing the stoichiometry to SnOx (with x lower than 2) and promoting film deposition beyond the thickness determined by FESEM, that is, there is an interaction of materials for the glass. As well as it can cause an increase in hydroxyl and the sample band gap energy.
Professor Daniele T Dias
Federal University of Technology - Paraná
Read the Original
This page is a summary of: Raman and photoacoustic spectroscopies of SnO2 thin films deposited by spin coating technique, Vibrational Spectroscopy, July 2020, Elsevier,
DOI: 10.1016/j.vibspec.2020.103094.
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