Enhanced sensing properties of Zn-doped MoO3 thin films developed using a nebulizer spray technique.

Zn-doped Molybdenum trioxide (MoO 3 :Zn) thin films were coated on glass substrates using a nebulizer spray pyrolysis technique to apply ammonia (NH 3) gas sensing. According to the structure examination, the crystallite size of the as-fabricated thin films is 64–77 nm. Field Emission Scanning Electron Microscopy (FESEM) images of the films confirm the formation of nanograins with islets-like shapes. In addition, Ultraviolet–Visible (UV–Vis) and photoluminescence (PL) studies were used to examine the samples optical bandgap and structural defects. Further, the MoO 3 : Zn sample's gas-sensing properties for ammonia detection were assessed at ambient temperature. The observed gas response of the MoO 3 :Zn3% sample was 20,900, and faster response and recovery times of 66s/9s. Furthermore, we observed that the MoO 3 :Zn3% sensor had exceptional ammonia selectivity. [Display omitted] • Zn-doped Molybdenum trioxide (MoO 3 :Zn) thin films were coated on glass substrates. • The crystallite size of the as-fabricated thin films has 64–77 nm. • FESEM images of the films confirm the formation of nanograins with islets-like shapes. • The observed gas sensitivity of the MoO 3 :Zn3% sample was 20,900%. • faster response and recovery periods of 66s/9s. [ABSTRACT FROM AUTHOR]