Influence of Applied Voltage on Droplet Size Distribution in Electrospraying of Thermoplastic Polyurethane

Jadhav, Amit; Wang, Lijing; Padhye, Rajiv

doi:10.7763/ijmmm.2013.v1.61

Cited by 8 publications

(5 citation statements)

References 11 publications

(12 reference statements)

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“…In addition, as the voltage increases, the total amount of charge in the spray is also enlarged. When the droplets have high positive charge, the deposition of droplets would form more porous structures 24 due to high repulsive force with a large spray angle which is observed in a magnified form in Fig. S1.…”

Section: Resultsmentioning

confidence: 97%

Electro-spray deposition of a mesoporous TiO₂charge collection layer: toward large scale and continuous production of high efficiency perovskite solar cells

Kim

Yoon

et al. 2015

Nanoscale

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The spin-coating method, which is widely used for thin film device fabrication, is incapable of large-area deposition or being performed continuously. In perovskite hybrid solar cells using CH(3)NH(3)PbI(3) (MAPbI(3)), large-area deposition is essential for their potential use in mass production. Prior to replacing all the spin-coating process for fabrication of perovskite solar cells, herein, a mesoporous TiO(2) electron-collection layer is fabricated by using the electro-spray deposition (ESD) system. Moreover, impedance spectroscopy and transient photocurrent and photovoltage measurements reveal that the electro-sprayed mesoscopic TiO(2) film facilitates charge collection from the perovskite. The series resistance of the perovskite solar cell is also reduced owing to the highly porous nature of, and the low density of point defects in, the film. An optimized power conversion efficiency of 15.11% is achieved under an illumination of 1 sun; this efficiency is higher than that (13.67%) of the perovskite solar cell with the conventional spin-coated TiO(2) films. Furthermore, the large-area coating capability of the ESD process is verified through the coating of uniform 10 × 10 cm(2) TiO(2) films. This study clearly shows that ESD constitutes therefore a viable alternative for the fabrication of high-throughput, large-area perovskite solar cells.

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Section: Resultsmentioning

confidence: 97%

Electro-spray deposition of a mesoporous TiO₂charge collection layer: toward large scale and continuous production of high efficiency perovskite solar cells

Kim

Yoon

et al. 2015

Nanoscale

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“…31,32 There are many parameters that interdependently influence the electrohydrodynamic disintegration mechanism of the liquid meniscus and subsequently the electrospraying regime, with the applied voltage and liquid flow rate being considered as the most determining ones. 33 To date, several functioning modes have already been described, with dripping, microdripping, and cone jet spraying being the most commonly studied. This order of succession of modes is often observed in relation to the voltage increase.…”

Section: Resultsmentioning

confidence: 99%

“…As previously described, ESD exhibits a variety of spraying regimes, the classification of which is based on the morphology and dynamics of the liquid meniscus. , There are many parameters that interdependently influence the electrohydrodynamic disintegration mechanism of the liquid meniscus and subsequently the electrospraying regime, with the applied voltage and liquid flow rate being considered as the most determining ones . To date, several functioning modes have already been described, with dripping, microdripping, and cone jet spraying being the most commonly studied.…”

Section: Resultsmentioning

confidence: 99%

Electrospray-Processed Soluble Acenes toward the Realization of High-Performance Field-Effect Transistors

Pitsalidis

Pappa

Hunter

et al. 2015

ACS Appl. Mater. Interfaces

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Functionalized acenes have proven to be promising compounds in the field of molecular electronics because of their unique features in terms of the stability, performance, and ease of processing. The emerging concept of large-area-compatible techniques for flexible electronics has brought about a wide variety of well-established techniques for the deposition of soluble acenes, with spray-coating representing an especially fruitful approach. In the present study, electrostatic spray deposition is proposed as an alternative to the conventional spray-coating processes, toward the realization of high-performance organic field-effect transistors (OFETs), on both rigid and flexible substrates. Particularly, a thorough study on the effect of the solvent and spraying regime on the resulting crystalline film's morphology is performed. By optimization of the process conditions in terms of control over the size as well as the crystallization scheme of the droplets, desirable morphological features along with high-quality crystal domains are obtained. The fabricated OFETs exhibit excellent electrical characteristics, with high field-effect mobility up to 0.78 cm(2)/(V s), I(on)/I(off) >10(4), and near-zero threshold voltages. Additionally, the good performance of the OFETs realized on plastic substrates gives great potentiality to the proposed method for applications in the challenging field of large-area electronics.

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“…Moreover, because the ROS can lead to protein denaturation and lipid peroxidation reactions, , the ROS contained in the EWNSs can roughen the surface of certain protein fibers, thereby changing the friction-related properties such as antipilling properties. In addition, nanosized water droplets, which exhibit a low evaporation rate because of the large surface area to volume ratio and high surface energy, , can modify the frictional properties of the fibers.…”

Section: Introductionmentioning

confidence: 99%

Innovative and Sustainable Multifunctional Finishing Method for Textile Materials by Applying Engineered Water Nanostructures

Zhu

Ding

et al. 2020

ACS Sustainable Chem. Eng.

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The use of multifunctional finishing methods, in which chemical agents are applied in a combined bath or a single step to impart specific functional properties to textiles, is becoming increasingly popular. However, the existing finishing methods cannot satisfy the requirements of green and sustainable development; specifically, such methods employ materials that are toxic to humans, consume a large number of chemicals and energy, generate harmful liquid waste, and rely on expensive equipment and complex operation processes, among other factors. This paper proposes a novel and ecofriendly approach involving engineered water nanostructures (EWNSs), based on the mechanism of electrospraying and the ionization of water. EWNSs exhibit unique physical and biological properties, such as an extended lifespan, high reactivity [because of the generation of reactive oxygen species (ROS)], and strong surface charge. The ROS wrapped in EWNSs, primarily including hydroxyl (OH • ) and superoxide radicals (O 2•− ), are highly active and react easily with certain materials, thereby modifying the surface properties of textiles by forming new functional groups on the material surface or changing the surface structures of the fibers. The proposed EWNS technology is consistently effective in improving the antibacterial activity, wetting ability, and pilling resistance of cotton, polyester, and wool, while ensuring the mechanical and esthetic properties of these materials. Moreover, this facile and versatile method utilizes a limited amount of water, leaves no chemical byproducts, and does not pose a risk to human health, thereby making it an appealing multifunctional finishing method that can be applied in various fields.

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Influence of Applied Voltage on Droplet Size Distribution in Electrospraying of Thermoplastic Polyurethane

Cited by 8 publications

References 11 publications

Electro-spray deposition of a mesoporous TiO₂charge collection layer: toward large scale and continuous production of high efficiency perovskite solar cells

Electro-spray deposition of a mesoporous TiO₂charge collection layer: toward large scale and continuous production of high efficiency perovskite solar cells

Electrospray-Processed Soluble Acenes toward the Realization of High-Performance Field-Effect Transistors

Innovative and Sustainable Multifunctional Finishing Method for Textile Materials by Applying Engineered Water Nanostructures

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Influence of Applied Voltage on Droplet Size Distribution in Electrospraying of Thermoplastic Polyurethane

Cited by 8 publications

References 11 publications

Electro-spray deposition of a mesoporous TiO2charge collection layer: toward large scale and continuous production of high efficiency perovskite solar cells

Electro-spray deposition of a mesoporous TiO2charge collection layer: toward large scale and continuous production of high efficiency perovskite solar cells

Electrospray-Processed Soluble Acenes toward the Realization of High-Performance Field-Effect Transistors

Innovative and Sustainable Multifunctional Finishing Method for Textile Materials by Applying Engineered Water Nanostructures

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Product

Resources

About

Electro-spray deposition of a mesoporous TiO₂charge collection layer: toward large scale and continuous production of high efficiency perovskite solar cells

Electro-spray deposition of a mesoporous TiO₂charge collection layer: toward large scale and continuous production of high efficiency perovskite solar cells