Au Doping ZnO Nanosheets Sensing Properties of Ethanol Gas Prepared on MEMS Device

Nagarjuna, Yempati; Hsiao, Yu‐Jen

doi:10.3390/coatings10100945

Cited by 27 publications

(15 citation statements)

References 33 publications

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“…It is now widely accepted that the control of these parameters can be exerted gainfully through the synthesis and device fabrication method. Amongst the most impactful control pathways are the oxide nanostructure and engineering of the interface [56,[58][59][60], the deposition method, posttreatment such as thermal decomposition [60], and doping [61][62][63][67][68][69]. The first reported application of ZnO as an electron transporting layer (ETL) for PSCs was by Kumar et al [70].…”

Section: Application Of Zno Nanostructures In Perovskite Solar Cellsmentioning

confidence: 99%

Influence of ZnO Nanostructure Morphologies on Perovskite Solar Cell Performance: A Review

Manabeng¹,

Mwankemwa²,

Ocaya³

et al. 2022

Preprint

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Zinc oxide (ZnO) has been widely studied over the last decade for its remarkable properties in optoelectronic and photovoltaic devices because of its high electron mobility and excitonic properties, probably the broadest range of nanostructured forms, and their ease and low cost of synthesis by a wide variety of methods. The volume of recent work on ZnO nanostructures and their devices can potentially overshadow significant developments in the field. Therefore, there is a need for a concise description of the most recent advances in the field. In this review, we focus on the effect of ZnO nanostructure morphologies on the performance of ZnO-based solar cells sensitized using methylammonium lead iodide perovskite. We present an exhaustive discussion of the synthesis routes for different ZnO nanostructure morphologies, ways to control the morphology, and the impact of morphology on the photo-conversion efficiency of a given PSC.

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Section: Application Of Zno Nanostructures In Perovskite Solar Cellsmentioning

confidence: 99%

Influence of ZnO Nanostructure Morphologies on Perovskite Solar Cell Performance: A Review

Manabeng¹,

Mwankemwa²,

Ocaya³

et al. 2022

Preprint

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“…These nanopores are distributed non-uniformly with varying diameters. The nanopores' structure shows a high possibility for gas adsorption on the film surface, and this allows increasing the sensitivity of the ZnO/CNTs film at room temperature [43][44][45]. Figure 2d,e shows the surface roughness of ZnO/CNTs and ZnO analyzed by ImageJ software.…”

Section: Morphological Analysismentioning

confidence: 99%

Fabrication of ZnO/CNTs for Application in CO2 Sensor at Room Temperature

et al. 2021

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Thin films of ZnO and ZnO/carbon nanotubes (CNTs) are prepared and used as CO2 gas sensors. The spray pyrolysis method was used to prepare both ZnO and ZnO/CNTs films, with CNTs first prepared using the chemical vapor deposition method (CVD). The chemical structure and optical analyses for all the prepared nanomaterials were performed using X-ray diffraction (XRD), Fourier transformer infrared spectroscopy (FTIR), and UV/Vis spectrophotometer devices, respectively. According to the XRD analysis, the crystal sizes of ZnO and ZnO/CNTs were approximately 50.4 and 65.2 nm, respectively. CNTs have average inner and outer diameters of about 3 and 13 nm respectively, according to the transmitted electron microscope (TEM), and a wall thickness of about 5 nm. The detection of CO2 is accomplished by passing varying rates of the gas from 30 to 150 sccm over the prepared thin-film electrodes. At 150 sccm, the sensitivities of ZnO and ZnO/CNTs sensors are 6.8% and 22.4%, respectively. The ZnO/CNTs sensor has a very stable sensitivity to CO2 gas for 21 days. Moreover, this sensor has a high selectivity to CO2 in comparison with other gases, in which the ZnO/CNTs sensor has a higher sensitivity to CO2 compared to H2 and C2H2.

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“…Microelectromechanical system (MEMS) techniques are widely used to fabricate gas sensing devices. 148,149 Many literature reports based on MEMS fabricated gas sensors using Au-based materials have been published [150][151][152] in recent years. MEMS technology also offers a single miniaturized system to complex multifunctional systems.…”

Section: Gold-cnts Nanostructuresmentioning

confidence: 99%