Gas sensing enhancing mechanism via doping-induced oxygen vacancies for gas sensors based on indium tin oxide nanotubes

Zhou, Jinyuan; Bai, Jing Long; Zhao, Hao; Yang, Zhen; Gu, Xiu Yun; Huang, Bao Yu; Zhao, Changhui; Cairang, Limao; Sun, Geng Zhi; Zhang, Zhenxing; Pan, Xiao Jun

doi:10.1016/j.snb.2018.03.008

Cited by 89 publications

(23 citation statements)

References 55 publications

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“…Clarke et al [34] assigned In 3d peaks at 444.8 eV and 443.6 eV to the metal oxide and metal respectively. However, in contrast Zhou [35] suggested doping with Sn shifts the In 3d by 1 eV and that of the Sn 3d by 2 eV to higher binding energy, although the values stated, when allowing for a different C 1s reference value are the same as Clarke's which was for an undoped indium oxide sample. In this work the Sn 3d within the ITO is shifted by 0.6 eV relative to a SnO 2 sample.…”

Section: Resultsmentioning

confidence: 88%

Flame Assisted Chemical Vapour Deposition of NiO hole transport layers for planar perovskite cells

Yates

Hodgkinson

Meroni

et al. 2020

Surface and Coatings Technology

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Thin films of polycrystalline NiO were deposited by Flame Assisted Chemical Vapour Deposition, which is an ideal process for in-line, atmospheric pressure deposition of wide area coatings. This, along with the ability to use aqueous salts rather than organic precursors or solvents makes it well suited for industrial integration. To establish the capability of FACVD deposited NiO for use as a low cost, commercially viable option planar perovskite cells were fabricated under ambient conditions. The resulting cells showed the importance of both the flame composition and NiO thickness. A continuous NiO Hole Transport Layer (HTL) was achieved for ca. 36 nm thick film, which showed a maximum higher efficiency of 12.3% over that of the control (11.8%) which used a spin coated HTL. This was mainly driven by the large improvement in the current density from 16.6 mA/cm 2 to 19.0 mA/cm 2 .

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Section: Resultsmentioning

confidence: 88%

Flame Assisted Chemical Vapour Deposition of NiO hole transport layers for planar perovskite cells

Yates

Hodgkinson

Meroni

et al. 2020

Surface and Coatings Technology

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show abstract

“…Based on the XPS analysis (Table 2), the Sn element is the highest in nanowire. The higher Sn content is, the more oxygen vacancies occur in the material [13]. The content of oxygen vacancy and the reaction area with ethanol gas are increasing from ITO film to nanowire (Fig.…”

Section: Gas Sensing Enhancing Mechanism Of Ito Nwsmentioning

confidence: 97%

“…The sensors were exposed to NO 2 in synthetic air with concentrations from 1 to 50 ppm showing a significant change in resistance. Zhou et al [13] designed a type of high-surface ITO nanotubes by single-nozzle electro spinning technique to research the gas sensing properties. The sensors based on nanotubes exhibited its maximum response at low temperature of 160 °C, and could quick respond to 100 ppm formaldehyde even at temperature less than 100 °C.…”

Section: Introductionmentioning

confidence: 99%

Gas-sensing properties of ITO materials with different morphologies prepared by sputtering

Zhang

Tian

et al. 2020

SN Appl. Sci.

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Indium tin oxide (ITO) materials with different morphologies have been fabricated via sputtering technology by adjusting the oxygen flow rate and RF-power. The repeatable and controllable growth conditions of different ITO materials have been achieved. The gas sensors with different ITO materials were fabricated on ceramic tube directly, which have the characteristics of low cost and simple preparation process. Through our analysis, the nanowires have larger specific surface area, more oxygen vacancies and an oriented electron transport channel. The sensor made by nanowires was the best one, and the value of sensitivity run up to 235.6 at the ethanol gas concentration of 400 ppm under 250 °C. The gas sensing properties of the whole ITO material system to ethanol gas were studied. The difference of gas sensing properties is explained by calculating the surface adsorption energy of ITO materials with different morphologies based on first-principle calculation method. These results provide guidance for the application of ITO materials in the field of gas sensors.

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“…Research on the sensor for chemical substance detection has become more important in recent years due to growing interest in the environment. Various materials such as semiconductors [ 1 ], organic materials [ 2 ], and ceramics [ 3 , 4 ] are used for chemical substances sensors. Among them, carbon nanotubes (CNT) have many advantages in sensor applications such as large surface area, excellent mechanical strength, and high electrical conductivity.…”

Section: Introductionmentioning

confidence: 99%

Investigation on the Printed CNT-Film-Based Electrochemical Sensor for Detection of Liquid Chemicals

Noh

Lee

et al. 2021

Sensors

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We studied electrochemical sensors using printed carbon nanotubes (CNT) film on a polyethylene telephtalate (PET) substrate. The mechanical stability of the printed CNT film (PCF) was confirmed by using bending and Scotch tape tests. In order to determine the optimum sensor structure, a resistance-type PCF sensor (R-type PCF sensor) and a comb-type PCF sensor (C-type PCF sensor) were fabricated and compared using a diluted NH3 droplet with various concentrations. The magnitude of response, response time, sensitivity, linearity, and limit of detection (LOD) were compared, and it was concluded that C-type PCF sensor has superior performance. In addition, the feasibility of PCF electrochemical sensor was investigated using 12 kinds of hazardous and noxious substances (HNS). The detection mechanism and selectivity of the PCF sensor are discussed.

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Gas sensing enhancing mechanism via doping-induced oxygen vacancies for gas sensors based on indium tin oxide nanotubes

Cited by 89 publications

References 55 publications

Flame Assisted Chemical Vapour Deposition of NiO hole transport layers for planar perovskite cells

Flame Assisted Chemical Vapour Deposition of NiO hole transport layers for planar perovskite cells

Gas-sensing properties of ITO materials with different morphologies prepared by sputtering

Investigation on the Printed CNT-Film-Based Electrochemical Sensor for Detection of Liquid Chemicals

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