Study of microstructural, optical and electrical properties of Mg dopped SnO thin films

Ali, Syed Mansoor; Muhammad, Jan; Hussain, Syed Tajammul; Bakar, Shahzad Abu; Ashraf, M.; Naeem-ur-Rehman,

doi:10.1007/s10854-013-1114-5

Cited by 21 publications

(5 citation statements)

References 26 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…For Na-doped film, these values are decreased to be between 2.0 and 1.25. This oscillatory behavior of n values was also reported for Mg-doped SnO 2 films 50 .…”

Section: Resultssupporting

confidence: 82%

Enhanced Gas Sensing Properties of Spin-coated Na-doped ZnO Nanostructured Films

Basyooni

Shaban

Sayed

2017

Sci Rep

169

View full text Add to dashboard Cite

In this report, the structures, morphologies, optical, electrical and gas sensing properties of ZnO and ZnO: Na spin-coated films are studied. X-ray diffraction (XRD) results reveal that the films are of a single phase wurtzite ZnO with a preferential orientation along (002) direction parallel to c-axis. Na doping reduces the crystalline quality of the films. The plane surface of ZnO film turned to be wrinkle net-work structure after doping. The reflectance and the optical band gap of the ZnO film decreased after Na doping. The wrinkle net-work nanostructured Na-doped film shows an unusually sensitivity, 81.9% @ 50 sccm, for CO2 gas at room temperature compared to 1.0% for the pure ZnO film. The signals to noise ratio (SNR) and detection limit of Na-doped ZnO sensor are 0.24 and 0.42 sccm, respectively. These enhanced sensing properties are ascribed to high surface-to-volume ratio, hoping effect, and the increase of O- vacancies density according to Kroger VinK effect. The response time increased from 179 to 240 s by the incorporation of Na atoms @50 sccm. This response time increased as the CO2 concentration increased. The recovery time is increased from 122 to 472 s by the incorporation of Na atoms @50 sccm.

show abstract

“…For Na-doped film, these values are decreased to be between 2.0 and 1.25. This oscillatory behavior of n values was also reported for Mg-doped SnO 2 films 50 .…”

Section: Resultssupporting

confidence: 82%

Enhanced Gas Sensing Properties of Spin-coated Na-doped ZnO Nanostructured Films

Basyooni

Shaban

Sayed

2017

Sci Rep

169

View full text Add to dashboard Cite

show abstract

“…The n exhibits oscillatory behaviour, and its values are in the range of 1.15-3.9. Similar phenomena were also detected in the spectra of Mg-doped SnO films 37 . According to the wave theory of light that accounts for the bending phenomena that cause the scattering, the decrease in particle size yields an increased amount of the first surface reflections, multiple scattering, and therefore the reflectivity and refractive index 32 .…”

Section: Optical Propertiessupporting

confidence: 82%

Design of high-sensitivity La-doped ZnO sensors for CO2 gas detection at room temperature

Abdelkarem,

Saad,

El Sayed

et al. 2023

Sci Rep

View full text Add to dashboard Cite

For the sake of people's health and the safety of the environment, more efforts should be directed towards the fabrication of gas sensors that can operate effectively at room temperature (RT). In this context, increased attention has been paid to developing gas sensors based on rare-earth (RE)-doped transparent conducting oxides (TCO). In this report, lanthanum-doped zinc oxide (La-doped ZnO) films were fabricated by sol–gel and spin-coating techniques. XRD analysis revealed the hexagonal structure of the ZnO films, with preferred growth along the (002) direction. The crystallite size was decreased from 33.21 to 26.41 nm with increasing La content to 4.0 at.%. The UV–vis–NIR indicating that the films are highly transparent (˃ 80%), La-doping increased the UV blocking ability of the films and narrowed the optical band gap (Eg) from 3.275 to 3.125 eV. Additionally, La-doping has influenced the refractive index of the samples. Gas sensing measurements were performed at ambient temperature (30 °C) and a relative humidity (RH) of 30%, employing different flow rates of carbon dioxide (CO2) gas used synthetically with air. Among the evaluated sensors, the ZnO: 4.0 at.% La sensor exhibited the most significant gas response, with a value of 114.22%. This response was observed when the sensor was subjected to a flow rate of 200 SCCM of CO2 gas. Additionally, the sensor revealed a response time of 24.4 s and a recovery time of 44 s. The exceptional performance exhibited by the sensor makes it very appropriate for a wide range of industrial applications. Additionally, we assessed the effect of humidity, selectivity, reusability, repeatability, detection limit, and limit of quantification.

show abstract

“…It gives significant information about the local structure changes due to incorporation of highly mismatching of Zn ions into WO 3 host lattice [20]. Figure 6 shows FTIR spectra of pure and Zn doped WO 3 (5 and 10 wt%) samples in room temperature.…”

Section: Fourier Transform Infrared Spectra Analysis (Ftir)mentioning

confidence: 99%

Influence of Zn doping on structural, optical and photocatalytic activity of WO3 nanoparticles by a novel microwave irradiation technique

Madhan¹,

Parthibavarman²,

Rajkumar³

et al. 2015

J Mater Sci: Mater Electron

View full text Add to dashboard Cite

In the present work we have successfully synthesized pure and zinc (Zn) doped WO 3 nanoparticles by microwave irradiation method for the first time. Powder X-ray diffraction results reveal that the WO 3 doped with Zn concentration from 0 to 10 wt% crystallizes in monoclinic structure and the results are in good agreement with the standard JCPDS data (card no: 83-0950). Field emission scanning electron microscopy studies illustrate that both the pristine and Zn doped WO 3 form in spherical shaped morphology with an average diameter of 48-36 nm, which is in good agreement with the average crystallite sizes calculated by Scherrer's formula. A considerable red shift in the absorbing band edge and decrease the band gap energy from 2.93 to 2.71 eV for Zn doped samples was observed by using UV-Vis spectra analysis. The defects in crystal and oxygen deficiencies were analyzed by photoluminescence spectra analysis. The photocatalytic activities of the pure and Zn doped WO 3 samples were evaluated by the degradation of methylene blue rhodamine B in an aqueous solution under visible light irradiation. The photocatalytic activity and reusability of Zn (10 wt%) doped WO 3 was much higher than that of the pure WO 3 . The improvement mechanism by Zn doping was also discussed.

show abstract

Study of microstructural, optical and electrical properties of Mg dopped SnO thin films

Cited by 21 publications

References 26 publications

Enhanced Gas Sensing Properties of Spin-coated Na-doped ZnO Nanostructured Films

Enhanced Gas Sensing Properties of Spin-coated Na-doped ZnO Nanostructured Films

Design of high-sensitivity La-doped ZnO sensors for CO2 gas detection at room temperature

Influence of Zn doping on structural, optical and photocatalytic activity of WO3 nanoparticles by a novel microwave irradiation technique

Contact Info

Product

Resources

About