Study the effect fe doped tin oxide for gas sensing applications

Abstract

Nanocrystalline semiconductors have become the focus of intense research due to their unique physical and chemical properties associated with reduced size and dimensions [1]. Tin dioxide (SnO2) has high transmittance in the visible region, high conductivity, and wide bandgap (Eg= 3.7 eV) which is employed in various applications such that [2]; solar cells [3,4], gas sensors [5,6], UV photodetectors [7], lithium-ion batteries (LIB) [8], and other optoelectronics devices. Numerous applications need new properties of SnO2, Which can be achieved through doping with extrinsic different elements such as Li, Cd, Cu, Al, F, Ta, and Sb, which leads to the modification in the electrical and optical properties of the material [9- 13]. A wide variety of physical and chemical methods used for the deposition of pure and doped SnO2 thin films, including; sol- gel[14], solid-state reaction [15], Chemical Bath Deposition [16], pulsed-laser deposition [17], RF Magnetron sputtering [18], chemical vapor deposition [19] and chemical spray pyrolysis [20,21]. The chemical spray pyrolysis method has the advantages of being efficient, low cost, and used to deposition large surfaces. In the present paper, the influence of Fe doping on some physical properties of tin oxide was investigated.