Influences of defects and Sb valence states on the temperature dependent conductivity of Sb doped SnO 2 thin films

Mao, Wenfeng; Xiong, Bangyun; Li, Qichao; Zhou, Yawei; Yin, Chongshan; Liu, Yong; He, Chunqing

doi:10.1016/j.physleta.2015.06.033

Cited by 19 publications

(8 citation statements)

References 35 publications

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“…The deconvolution XPS peak of Sb 3d3/2 is shown in Fig. 5 d and confirms the coexistence of Sb 5+ and Sb 3+ into SnO2 lattice sites [15,17,32,35] with Sb 3+ located on the surface and grain boundaries of ATO films [4,21,33]. The high percentage of Sb 5+ contributes to an increase of carrier concentration, therefore a decrease in resistivity of ATO films [30].…”

Section: Phase and Crystallite Size Analysissupporting

confidence: 62%

“…Currently, ATO thin films have been prepared by different methods including electro-deposition and dipcoating [20], sputtering techniques [13,16,21], spray ultrasonic method [14,22], chemical spray pyrolysis technique [23,24], sol-gel techniques [15,19,25,26], plasma-assisted molecular epitaxy [27]. Compared with other preparation methods, herein, ATO thin films were prepared by sol-gel spin-coating method due to its simplicity, low cost and high effectiveness.…”

Section: Introduction mentioning

confidence: 99%

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Dependence of Electrical and Optical Properties of Sol-gel-derived SnO2 Thin Films on Sb-substitution

Muhire

Yang

Huo

et al. 2019

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In the present work, Sb-doped SnO2 (ATO) thin films were deposited on Si substrates by spin-coating method and the influence of Sb-doping on surface roughness, structural, optical and electrical properties has been investigated. AFM measurements show that the surface roughness decreases with increasing the Sb-doping concentration up to 5 mol%. XRD results confirm that all prepared ATO films have a tetragonal rutile structure of tin oxide. It has been observed that both the crystallite size and the extinction coefficient decrease with increasing Sb-doping concentration up to 5 mol%, while the refractive index increases with increasing Sb-doping concentration. The electrical resistivity decreases with increasing Sb-doping concentration, and the lowest resistivity obtained is 8.5 × 10-3 Ω.cm for SnO2 doped with 7.5 mol% of Sb.

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Section: Phase and Crystallite Size Analysissupporting

confidence: 62%

Section: Introduction mentioning

confidence: 99%

Dependence of Electrical and Optical Properties of Sol-gel-derived SnO2 Thin Films on Sb-substitution

Muhire

Yang

Huo

et al. 2019

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“…The amount of Sb measured by XPS in the ATO samples was determined to be ~5%, which is close to an optimum value for Sb [36]. The Sb 3d spectrum consists of two characteristic peaks for 3d3/2 and 3d5/2, located at ~540 and ~531 eV, respectively, because of spin-orbit interactions [37][38][39]. Practically, it is hard to analyze the accurate valence state of antimony by fitting the Sb 3d5/2 peak because of overlap with the O 1s peak.…”

Section: Resultsmentioning

confidence: 53%

“…The content of Sb 5+ as a dopant in the SnO 2 structure could be significantly related to its electrical behavior, i.e., conductivity. In other words, Sb 5+ might play the role of the donor to enhance electrical conductivity, producing extra electrons in the conduction band of the Sb-doped SnO 2 structure as an n-type semiconductor [38,39]. The electrical conductivities in the Sb-doped SnO 2 samples heated at different temperatures were compared ( Figure 5).…”

Section: Introductionmentioning

confidence: 99%

Effect of Sb-Doped SnO2 Nanostructures on Electrocatalytic Performance of a Pt Catalyst for Methanol Oxidation Reaction

et al. 2020

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In this study, antimony-doped tin oxide (ATO) support materials for a Pt anode catalyst in direct methanol fuel cells were prepared and electrochemically evaluated. When the heating temperature was increased from 300 to 400 °C, the ATO samples exhibited a slightly decreased specific surface area and increased electrical conductivity. In particular, the ATO sample heated at 350 °C in an air atmosphere showed improved electrical conductivity (1.3 S cm−1) with an optimum specific surface area of ~34 m2 g−1. The supported Pt catalysts were synthesized using a polyol process with as-prepared and heated ATO samples and Vulcan XC-72R as supports (denoted as Pt/ATO, Pt/ATO-350, and Pt/C, respectively). In the methanol oxidation reaction (MOR), compared to Pt/C and Pt/ATO, Pt/ATO-350 exhibited the best electrocatalytic activity and stability for MOR, which could be attributed to Pt nanoparticles on the relatively stable oxide support with high electrical conductivity and interaction between the Pt catalyst and the heated ATO support.

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“…Positron annihilation lifetime spectroscopy (PALS) has drawn much attention recently in condensed materials research due to its high sensitivity to vacancies [13,14], surface and interface defects, free-volume holes [15][16][17] and pores [18][19][20]. When an energetic positron is implanted in solid materials, it slows down to thermalized state through collisions with surrounding molecular electrons and molecules.…”

Section: Introductionmentioning

confidence: 99%

Positron Annihilation Studies of the Free Volumes in Nylon12/PVA Films Treated by Supercritical Carbon Dioxide

Yin

Zhou

et al. 2017

Acta Phys. Pol. A

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Free volume variations of Nylon12/Polyvinyl alcohol (Nylon12/PVA) blends treated in supercritical carbon dioxide (ScCO2) were investigated using positron annihilation lifetime spectroscopy. It is found that o-Ps lifetime τ3 and the corresponding intensity I3 in Nylon12/PVA decrease with increase of the PVA content. Being treated in ScCO2 at 50• C and 20 MPa for 1 h, the free volume holes in Nylon12/PVA blends expand to different extents depending on the weight ratio of PVA. After releasing of CO2, the free volume size decreases as a function of the elapsed time due to the molecular relaxation, and the relaxation time constant depends on the content of PVA in the blends.

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Influences of defects and Sb valence states on the temperature dependent conductivity of Sb doped SnO 2 thin films

Cited by 19 publications

References 35 publications

Dependence of Electrical and Optical Properties of Sol-gel-derived SnO2 Thin Films on Sb-substitution

Dependence of Electrical and Optical Properties of Sol-gel-derived SnO2 Thin Films on Sb-substitution

Effect of Sb-Doped SnO2 Nanostructures on Electrocatalytic Performance of a Pt Catalyst for Methanol Oxidation Reaction

Positron Annihilation Studies of the Free Volumes in Nylon12/PVA Films Treated by Supercritical Carbon Dioxide

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