Gas sensing of Au/n-SnO2/p-PSi/c-Si heterojunction devices prepared by rapid thermal oxidation

Muhsien, Marwa Abdul; Salem, Evan T.; Agool, Ibrahim R.; Hamdan, Haidar H.

doi:10.1007/s13204-013-0244-7

Cited by 32 publications

(9 citation statements)

References 38 publications

(48 reference statements)

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“…The sensitivity behaviors of the Au/n-SnO 2 /p-PSi/c-Si sensors to H 2 and CO 2 gases were achieved sensitivity, accordingly about 60% and 95% at temperature 250-300 °C [11]. Pt-catalysed SnO 2 / Porous-silicon hybrid sensor of CO increased by a factor of 7.5 compared to the ones on for 10min and c-Si (at 100 °C) [12].…”

Section: Introductionmentioning

confidence: 92%

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Humidity Sensing of SnO/Porous Silicon Heterojunctions

TD¹

2022

AMMS

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A nanoparticle metal oxide SnO thin film fabricated on Porous Silicon (PS) is studied as a subject for room temperature humidity sensing device application. The structural, photoluminescence, optical and electrical properties of thin films and SnO/PS/Si heterostructures are studied. Current-voltage characteristics of SnO/PS/Si heterojunctions are measured under normal atmosphere and humid environment in the range of 62-95% RH. The humidity-resistance effect, i.e., decrease of resistance between contacts to SnO and Si substrate under humidity exposition is obtained for SnO/PS/Si heterostructures at room temperature. The structure shows well pronounced response-recovery behavior (response time about 1min) after successive cycles of placing in humid environment. The similar dependence is observed for the capacitance under humidity. The mechanism for the humidity-stimulated electricity in SnO/PS/Si sensor at room temperature is discussed.

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Section: Introductionmentioning

confidence: 92%

“…The sensitivity of the prepared on the glass is better than on porous silicon. Significant sensing response of SnO 2 /porous silicon heterojunctions could be obtained at sufficiently high temperature [11][12][13]. The crystallin (for example, lattice constants (a,c)), and band gaps of SnO and SnO 2 are significantly different [16].…”

Section: Introductionmentioning

confidence: 99%

Humidity Sensing of SnO/Porous Silicon Heterojunctions

TD¹

2022

AMMS

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“…where D is grain size in (nm), K is constant depended on the used X-Ray wave length, β is the full width at half maximum, Ɵ is the diffracted angle, δ is the density of dislocation which refers to the number of dislocations in a unit volume of a crystalline material and ε is the stress [23][24][25][26][27][28][29][30].…”

Section: Structural Studiesmentioning

confidence: 99%

Niobium Pentoxide thin films employ simple colloidal suspension at low preparation temperature

et al. 2017

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Abstract. In this work a nano-colloidal suspension is used to prepare Nb 2 O 5 thin films. The effect of different substrates on structural properties of niobium pentoxide thin film deposited by spin coating technique on silicon and quartz substrates are presented. We observed that the obtained structure is monocline in both substrates. The diffraction peaks in both substrates ensured the successful formation of Nb 2 O 5 thin films with a clear polymorphous structure. However, the structure became more crystalline with additional distinguished peaks on silicon substrate comparing to quartz substrate. The extracted structural parameters from X-Ray diffraction show that the grain size of the thin films on quartz is smaller than silicon with the values of 16.47 nm and 20.98 nm respectively. The stress measurement records the values of 0.19 and 0.00719 for the thin films deposited on silicon and quartz substrates respectively. Effects of film thickness depicted increment in the absorbance and reduction in the band gap. Energy gaps of 2.7, 2.58 and, 2.5 eV are measured as a result of increasing the film thicknesses of 325, 420 and 450 nm respectively.

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“…Generally, in resistive gas-sensing method, bridging oxygen forms layer on sensing material, through which electron transfer takes place (Alwan and Dheyab 2017). The transfers of electrons result in resistance change through which sensing response is measured (Muhsien et al 2014). …”

Section: Introductionmentioning

confidence: 99%

Synthesis of stable cesium superoxide nanoparticles for gas sensing application by solution-processed spray pyrolysis method

Nemade¹

2017

Appl Nanosci

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In the present work, we synthesized cesium superoxide (CsO 2 ) nanoparticles by solution-processed spray pyrolysis technique. The as-synthesized CsO 2 nanoparticles were characterized through Raman spectroscopy, X-ray diffraction, scanning electron microscopy and ultraviolet-visible spectroscopy. The CsO 2 nanoparticle-based gas sensor is more selective towards the carbon dioxide (CO 2 ) gas. The sensor shows good gas sensing performance for CO 2 gas. Gas sensing mechanism is dominated by the adsorption and desorption process. Through this paper, we studied another dimension of gas sensing process by employing superoxide for gas sensing. The sensing mechanism for cesium superoxide is explained by newly designed ''bridging oxygen-free mechanism''.

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Gas sensing of Au/n-SnO2/p-PSi/c-Si heterojunction devices prepared by rapid thermal oxidation

Cited by 32 publications

References 38 publications

Humidity Sensing of SnO/Porous Silicon Heterojunctions

Humidity Sensing of SnO/Porous Silicon Heterojunctions

Niobium Pentoxide thin films employ simple colloidal suspension at low preparation temperature

Synthesis of stable cesium superoxide nanoparticles for gas sensing application by solution-processed spray pyrolysis method

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