Spray deposited Mg-doped SnO2 thin film LPG sensor: XPS and EDX analysis in relation to deposition temperature and doping

Thomas, Boben; Benoy, Skariah

doi:10.1016/j.jallcom.2014.11.092

Cited by 72 publications

(30 citation statements)

References 50 publications

(40 reference statements)

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“…Two symmetric peaks are centered at 486.1 and 494.6 eV, corresponding to Sn 3d 5/2 and Sn 3d 3/2 , respectively. A spin-orbit coupling energy between the Sn 3d 5/2 and Sn 3d 3/2 levels is estimated to be 8.5 eV, which is very close to the value reported in standard spectrum of Sn 3d [24]. The core level of Mg 2p located at 50.4 eV can be observed in Fig.…”

Section: Resultssupporting

confidence: 83%

Facile synthesis and photocatalytic performance of Mg2SnO4/SnO2 heterostructures

et al. 2015

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Highly crystalline MgSn(OH) 6 cubic and polyhedral nanoparticles were synthesized via hydrothermal method by adjusting the ethanol/water ratio. Mg 2 SnO 4 / SnO 2 nanoparticles have been successfully obtained by subsequent calcining, which maintain the original morphologies of the precursor with shrank size and rough surface. The structural properties of Mg 2 SnO 4 /SnO 2 heterostructures were characterized by X-ray diffraction, scanning electron microscopy, transmission electron microscopy, X-ray photoelectron spectroscopy, UV-Vis absorption spectroscopy, and N 2 adsorption/desorption isotherms. The photocatalytic activity of the Mg 2 SnO 4 / SnO 2 nanoparticles was further evaluated by the degradation of methylene blue (MB) under UV illumination. The obtained results revealed that Mg 2 SnO 4 /SnO 2 polyhedral nanoparticles have excellent performance on photocatalytic degradation of MB. It is assumed that the red shift of band gap, oxygen vacancies, and higher specific surface areas of polyhedral Mg 2 SnO 4 /SnO 2 nanocomposites contribute to the enhancement in the photocatalytic activity.

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Section: Resultssupporting

confidence: 83%

Facile synthesis and photocatalytic performance of Mg2SnO4/SnO2 heterostructures

et al. 2015

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“…A typical diagram of band structure of SnO 2 is shown in Figure b. The bandgaps of SnO 2 reported in reference range from 3.5 to over 4.0 eV (even up to 4.4 eV for amorphous SnO 2 ), depending on its specific synthesis conditions . SnO 2 has a conduction band (CB) of about 4.5 eV, which is lower than the CB of about 3.4–3.9 eV for all perovskite materials such as MAPbI 3 , FAPbI 3 , MAPbBr 3 , and CsSnI 3 (Figure b).…”

Section: General Features Of Sno2 As Etls In Pscsmentioning

confidence: 99%

Review on the Application of SnO₂ in Perovskite Solar Cells

Xiong

Guo

Wen

et al. 2018

Adv Funct Materials

505

335

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SnO 2 has been well investigated in many successful state-of-the-art perovskite solar cells (PSCs) due to its favorable attributes such as high mobility, wide bandgap, and deep conduction band and valence band. Several independent studies show the performances of PSCs with SnO 2 are higher than that with TiO 2 , especially in device stability. In 2015, the first planar PSCs were reported with a power conversion efficiency over 17% using a low temperature sol-derived SnO 2 nanocrystal electron transport layer (ETL). Since then, many other groups have also reported high performance PSCs based on SnO 2 ETLs. SnO 2 planar PSCs show currently the highest performance in planar configuration devices (21.6%) and are close to the record holder of TiO 2 mesoporous PSCs, suggesting their high potential as ETLs in PSCs. The main concerns with the application of SnO 2 as ETL are that it suffers from degradation in high temperature processes and that its much lower conduction band compared to perovskite may result in a voltage loss of PSCs. Here, notable achievements to date are outlined, the unique attributes of SnO 2 as ETLs in PSCs are described, and the challenges facing the successful development of PSCs and approaches to the problems are discussed.

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“…Despite this, the response magnitudes did not show significant changes. Generally, the MTO3 films showed better medium-term stability displaying 8% and 6% less deviation in the base line resistance during the whole testing period (see experimental T op : temperature of operation, t res : response time, * R a /R g calculated from [19,39,45]…”

Section: Gas Sensing Propertiesmentioning

confidence: 99%

Influence of Mg Doping Levels on the Sensing Properties of SnO2 Films

Bendahmane

Tomić

Touidjen

et al. 2020

Sensors

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This work presents the effect of magnesium (Mg) doping on the sensing properties of tin dioxide (SnO2) thin films. Mg-doped SnO2 films were prepared via a spray pyrolysis method using three doping concentrations (0.8 at.%, 1.2 at.%, and 1.6 at.%) and the sensing responses were obtained at a comparatively low operating temperature (160 °C) compared to other gas sensitive materials in the literature. The morphological, structural and chemical composition analysis of the doped films show local lattice disorders and a proportional decrease in the average crystallite size as the Mg-doping level increases. These results also indicate an excess of Mg (in the samples prepared with 1.6 at.% of magnesium) which causes the formation of a secondary magnesium oxide phase. The films are tested towards three volatile organic compounds (VOCs), including ethanol, acetone, and toluene. The gas sensing tests show an enhancement of the sensing properties to these vapors as the Mg-doping level rises. This improvement is particularly observed for ethanol and, thus, the gas sensing analysis is focused on this analyte. Results to 80 ppm of ethanol, for instance, show that the response of the 1.6 at.% Mg-doped SnO2 film is four times higher and 90 s faster than that of the 0.8 at.% Mg-doped SnO2 film. This enhancement is attributed to the Mg-incorporation into the SnO2 cell and to the formation of MgO within the film. These two factors maximize the electrical resistance change in the gas adsorption stage, and thus, raise ethanol sensitivity.

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Spray deposited Mg-doped SnO2 thin film LPG sensor: XPS and EDX analysis in relation to deposition temperature and doping

Cited by 72 publications

References 50 publications

Facile synthesis and photocatalytic performance of Mg2SnO4/SnO2 heterostructures

Facile synthesis and photocatalytic performance of Mg2SnO4/SnO2 heterostructures

Review on the Application of SnO₂ in Perovskite Solar Cells

Influence of Mg Doping Levels on the Sensing Properties of SnO2 Films

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Spray deposited Mg-doped SnO2 thin film LPG sensor: XPS and EDX analysis in relation to deposition temperature and doping

Cited by 72 publications

References 50 publications

Facile synthesis and photocatalytic performance of Mg2SnO4/SnO2 heterostructures

Facile synthesis and photocatalytic performance of Mg2SnO4/SnO2 heterostructures

Review on the Application of SnO2 in Perovskite Solar Cells

Influence of Mg Doping Levels on the Sensing Properties of SnO2 Films

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Review on the Application of SnO₂ in Perovskite Solar Cells