Details

Autor(en) / Beteiligte

• Dasari, Sunil Gavaskar
• Nagaraju, Pothukanuri
• Yelsani, Vijayakumar
• Ramana Reddy, M. V.

Titel

Mesoporous sieve structured ITO-based thin films for enhanced formaldehyde detection

Ist Teil von

• Journal of materials science. Materials in electronics, 2022-10, Vol.33 (30), p.23447-23467

Ort / Verlag

New York: Springer US

Erscheinungsjahr

2022

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• Porous-structured materials are potential candidates for gas sensor applications because of their large specific surface areas, high pore volumes, unblocked pores, and excellent thermal stabilities. Tin (Sn) is an excellent catalytic material for improving the active sites on the material surface and plays a crucial role in gas-sensing measurements. In this study, indium oxide (IO) and tin-doped indium oxide (ITO) films with different concentrations of Sn were deposited into In 2 O 3 using the spray pyrolysis method. Various characterisation techniques have been used to determine the structural, morphological, optical, chemical, and gas-sensing properties. XRD studies revealed the polycrystalline cubic structure of the deposited films with a (222) crystal orientation, and the crystallite size increased with increasing Sn concentration. TEMand BET surface area investigations revealed the highly porous nanostructured nature with large pore volumes of the deposited thin films. The XPS and PL emission spectra indicated that the films' chemisorbed oxygen and oxygen vacancy defects and these were estimated using Smakula’s formula. A significant impact of Sn doping on formaldehyde sensing properties were observed. The ITO thin film deposited with 6 wt % of tin exhibited the best sensing characteristics at room temperature.