Sensing Mechanism and Behavior of Sputtered ZnCdO Ozone Sensors Enhanced by Photons for Room- Temperature Operation

Yu, Jie‐Zhong; Yang, Huijun; Mo, H. J.; Kim, T.S.; Jeong, T. S.; Youn, C. J.; Hong, Kim Jae

doi:10.1007/s11664-012-2462-2

Cited by 11 publications

(7 citation statements)

References 12 publications

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“…The disadvantage of many works is incomplete information about the parameters of the radiation used: the spectrum and power of light sources, the illuminance of the sensor layer, and the method of its determination. In this regard, it should be noted that the works on the develop of integrated miniature devices that combine the sensor layer and the light-emitting element in close to each other, which allows solving the problems of both reproducibility and the most efficient use of light energy [ 188 , 189 , 190 , 191 ]. Not all authors provide data on the long-term stability of sensitized materials containing reactive particles.…”

Section: Discussionmentioning

confidence: 99%

Light Activation of Nanocrystalline Metal Oxides for Gas Sensing: Principles, Achievements, Challenges

2021

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The review deals with issues related to the principle of operation of resistive semiconductor gas sensors and the use of light activation instead of thermal heating when detecting gases. Information on the photoelectric and optical properties of nanocrystalline oxides SnO2, ZnO, In2O3, and WO3, which are the most widely used sensitive materials for semiconductor gas sensors, is presented. The activation of the gas sensitivity of semiconductor materials by both UV and visible light is considered. When activated by UV light, the typical approaches for creating materials are (i) the use of individual metal oxides, (ii) chemical modification with nanoparticles of noble metals and their oxides, (iii) and the creation of nanocomposite materials based on metal oxides. In the case of visible light activation, the approaches used to enhance the photo- and gas sensitivity of wide-gap metal oxides are (i) doping; (ii) spectral sensitization using dyes, narrow-gap semiconductor particles, and quantum dots; and (iii) addition of plasmon nanoparticles. Next, approaches to the description of the mechanism of the sensor response of semiconductor sensors under the action of light are considered.

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Section: Discussionmentioning

confidence: 99%

Light Activation of Nanocrystalline Metal Oxides for Gas Sensing: Principles, Achievements, Challenges

2021

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“…In the natural environment, the ozone concentration is around 30 parts per billion. It is essential to monitor ozone concentrations to maintain human health [1]. Metal oxides are good candidates for sensor applications.…”

Section: Introductionmentioning

confidence: 99%

“…Many studies have been conducted to reduce the temperature at which the sensor operates by using a large variety of nanostructures [6] in the form of nanoparticles [7], nanotubes [8], nanobelts [9] etc., which are prepared by various techniques including hydrothermal [10], electrospinning [11], sol-gel [12], thermal evaporation [4], etc. Also, RT gas sensor sensitivity can be enhanced using ultraviolet radiation (UV) [1]. Many experimental studies have stated the sensing mechanism of UV-assisted gas sensors [13].…”

Section: Introductionmentioning

confidence: 99%

CdO: SnO2 Composite UV-Assisted Room Temperature Ozone Sensor

Salman

Kadhim²,

Khalefa³

2023

Iraqi Journal of Science

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Cadmium-tin oxide (CSO) thin films were fabricated by spray pyrolysis method at different substrate temperatures (Ts). The results showed a significant effect of Ts on the surface morphology and the electrical properties, which in turn has a significant effect on sensor gas sensitivity. The sample prepared at 400 °C appeared in the form of a donut shape, which has the best ozone sensitivity. No ozone sensitivity appeared in-dark, while showed good sensitivity when illuminated with UV at room temperature (RT). The study showed that the photon exposure method can substitute for the conventional method of sensors heating.

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“…Accurate measurement of ozone concentration as a greenhouse gas has become crucial in light of the aftermath effect of exposure to an unsafe quantity of ozone gas [1], [2]. The measurement of ozone gas concentration depends on the accuracy of the ozone gas absorption cross-section [3], [4].…”

Section: Introductionmentioning

confidence: 99%

The concurrent upshot of optical path-length and pressure on O3 absorption cross-section in relation to green communication

David

Enenche

Alenoghena

et al. 2022

IJAAS

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Ozone gas is a greenhouse gas. Accurate measurement of its concentration is dependent on the right value of the ozone gas absorption cross-section. In the literature, discrepancies and inconsistencies have been however linked with ozone gas absorption cross-section. In the literature, information on the pressure effect on pressures less than 100 mbar and greater than 100 but less than 1000 mbar is not available for the visible spectrum. Thus, creating an information gap which this manuscript is intended to fill up. This is the problem that has been addressed in this present work. The method of simulation with SpectralCalc is the method adopted for the present work. HITRAN 2012 simulator, available on spectralcalc.com, was used in simulating the ozone gas absorption cross-section to determine the simultaneous effect of optical path length and pressure at two peak wavelengths in the visible spectrum. Simulation outcomes were obtained for an optical path length of 10 cm to 120 cm shows that the optimum absorption cross-section value of 5.1084×10-25 m2/molecule at 603 nm and 4.7182×10-25 m2/molecule at 575 nm for gas cells length between 10 cm and 120 cm are obtained at peak points. Pressure values at which ozone gas absorption cross-section becomes a constant value of 5.1058×10-25 m2/molecule at 603 nm and 4.7158×10-25 m2/molecule at 575 nm is optical path length dependent. The percentage difference between 5.1084×10-25 m2/molecule and 5.1058×10-25 m2/molecule is 0.05% for all lengths of gas cells considered. Similarly, the percentage difference between 4.7182×10-25 m2/molecule and 4.7158×10-25 m2/molecule is also 0.05% for all lengths of gas cells considered. These results are relevant for high accuracy and high precision ozone gas measurements. Furthermore, efficient measurement of ozone gas is a direct enhancement of green communication.

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Sensing Mechanism and Behavior of Sputtered ZnCdO Ozone Sensors Enhanced by Photons for Room- Temperature Operation

Cited by 11 publications

References 12 publications

Light Activation of Nanocrystalline Metal Oxides for Gas Sensing: Principles, Achievements, Challenges

Light Activation of Nanocrystalline Metal Oxides for Gas Sensing: Principles, Achievements, Challenges

CdO: SnO2 Composite UV-Assisted Room Temperature Ozone Sensor

The concurrent upshot of optical path-length and pressure on O<sub>3</sub> absorption cross-section in relation to green communication

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