The spatial and surface coverage reliance of plasmonic Au nanoparticles is controlled by a roll-t... more The spatial and surface coverage reliance of plasmonic Au nanoparticles is controlled by a roll-to-roll compatible ultrasonic spray coating technique, providing enhanced electroluminescence, luminous efficacy and external quantum efficiency.
Perovskite materials have gathered increased interest over the last decade. Their rapidly rising ... more Perovskite materials have gathered increased interest over the last decade. Their rapidly rising efficiency, coupled with the compatibility with solution processing and thin film technology has put perovskite solar cells (PSC) on the spotlight of photovoltaic research. On top of that, band gap tunability via composition changes makes them a perfect candidate for tandem applications, allowing for further harvest of the solar irradiation spectrum and improved power conversion efficiency (PCE). In order to convert all these advantages into large scale production and have increased dissemination in the energy generation market, perovskite fabrication must be adapted and optimized with the use of high throughput, continuous processes, such as ultrasonic spray coating (USSC). In this paper we investigate the ultrasonically spray coated perovskite layers for photovoltaic applications, with particular focus on the quenching-assisted crystallization step. Different quenching techniques are i...
Nanometer-thick, ultrathin coatings applied over a large area are of paramount importance for var... more Nanometer-thick, ultrathin coatings applied over a large area are of paramount importance for various application fields such as biomedicine, space and automotive, organic electronics, memory devices, or energy storage devices. So far wet chemical deposition as a cost-effective, scalable, and versatile method can only be used for thicker deposits. Here the formation of uniform ultra-thin coatings with thicknesses below 15nm using a nature-inspired, roll-to-roll compatible Spray-on-Screen (SoS) technology is reported. For this, the finite micro-droplet generation of Ultrasonic Spray Coating (USSC) is combined with the coating formation from a screen printing mesh. Hydrophobic micro-threads of the mesh, resembling the micro-hair on the legs of water striders, produce millidroplets from microdroplets, and when applying external pressure to the mesh, dynamic wetting is enforced. The proposed technology is applicable for a wide variety of substrates and applications. It is shown by theor...
Smart textiles are a rapidly expanding field in the world of textiles, announcing a new and intri... more Smart textiles are a rapidly expanding field in the world of textiles, announcing a new and intriguing era. Different functionalities can be added to the textile to make the textile smart and intelligent. One of these functionalities is the addition of light-emitting layers or devices that can be incorporated into the textiles. These light-emitting textiles find a broad application in the field of interior and exterior design and wearable applications. Depending on the application, two light-emitting devices, the alternating current powder electroluminescent (ACPEL) device and the organic light emitting diode (OLED), both consisting out of a stack of thin layers, can be directly printed on top of the textile substrates. With its relatively high AC voltage of 50–200 V, the ACPEL device is more suited for interior and exterior applications while the OLED with a low DC voltage of 3–5 V is a perfect candidate for wearable applications. To maintain typical textile properties such as flex...
The heat transfer method can be used in biosensing applications to detect analytes. Until now, th... more The heat transfer method can be used in biosensing applications to detect analytes. Until now, the heater module always consisted of a heating element and copper heat-spreader. In order to improve the sensitivity of the sensors, a planar heatingand sensing element is proposed. Milling of circuit boards is an established method for creating planar heaters. An alternative has recently emerged in the form of inkjet printing. In this work, a comparison of the heat distribution is made between milled circuit board heaters on a fibreglass substrate and inkjet printed heaters on a flexible PET substrate. [1]
This work was financially supported by the CORNET project POLEOT (IWT-TETRA-120629) and Hasselt U... more This work was financially supported by the CORNET project POLEOT (IWT-TETRA-120629) and Hasselt University (BOF).
Smart textiles are an expanding field with much potential and arouse interest in the R&D sphe... more Smart textiles are an expanding field with much potential and arouse interest in the R&D sphere and industry. These find vast applications in engineering, healthcare and fashion, and contribute additional functionality and intelligence to structures. Quiet often the intelligence of such smart structures is supported by electronics that ensure functions such as data transfer and analysis for monitoring systems. Moreover, many smart textile systems require also energy source. At present, there is a great variety of scenarios to implement the joining of the functional textile compounds and electronics. Nevertheless, the joining technology is one the key challenges for smart textile developers, especially regarding wearable applications. Smart luminous textiles are of great interest for applications such as clothing and interior design and visual merchandizing. Moreover, luminous textiles are beneficial for protective clothing and sportswear in order to insure better visibility of the wear and interactive design for non-verbal communication. Additionally, luminous textiles have potentials for healthcare and medicine applications such as phototherapy. At present, such smart textiles are mostly limited to LED integration. Despite well-developed techniques for LED attachment onto textiles, power sourcing and controlling of the electronics for more complex LED matrixes remains a field for technology improvement. Moreover, OLED technology is more preferable for some applications due to fragility of more sophisticated and large-scale LED matrixes. This study presents a preliminary study for reversible joining of textiles and electronics within a novel concept for electroluminescence (EL) towards Organic Light Emitting Devices (OLED) implementations by printing technology. Technical embroidery is suggested as a promising technology that ensures continuous manufacturing of the functional textile compounds, electro-conductive paths and the joining platforms for electronic interconnections with active textiles. A novel concept for EL is developed in order to continuously implement the functional textile elements and ensure an efficient solution for the smart textile bonding with electronics. Regarding specifics of the development usage conditions, solutions for reversible joining are in the focus of the study. Finally, a concept of the bonding module for the electro-conductive platforms is described to be applied to custom developed EL structures on textiles.
The authors would like to thank the research and funding partners of the CORNET project POLEOT (I... more The authors would like to thank the research and funding partners of the CORNET project POLEOT (IWT-TETRA 120629) and the INTERREG project ORGANEXT.
The author would like to thank the financial contribution from the CORNET project POLEOT (IWT-TET... more The author would like to thank the financial contribution from the CORNET project POLEOT (IWT-TETRA-120629) and the support from BOF (Bijzonder OnderzoeksFonds) of Hasselt University.
The spatial and surface coverage reliance of plasmonic Au nanoparticles is controlled by a roll-t... more The spatial and surface coverage reliance of plasmonic Au nanoparticles is controlled by a roll-to-roll compatible ultrasonic spray coating technique, providing enhanced electroluminescence, luminous efficacy and external quantum efficiency.
Perovskite materials have gathered increased interest over the last decade. Their rapidly rising ... more Perovskite materials have gathered increased interest over the last decade. Their rapidly rising efficiency, coupled with the compatibility with solution processing and thin film technology has put perovskite solar cells (PSC) on the spotlight of photovoltaic research. On top of that, band gap tunability via composition changes makes them a perfect candidate for tandem applications, allowing for further harvest of the solar irradiation spectrum and improved power conversion efficiency (PCE). In order to convert all these advantages into large scale production and have increased dissemination in the energy generation market, perovskite fabrication must be adapted and optimized with the use of high throughput, continuous processes, such as ultrasonic spray coating (USSC). In this paper we investigate the ultrasonically spray coated perovskite layers for photovoltaic applications, with particular focus on the quenching-assisted crystallization step. Different quenching techniques are i...
Nanometer-thick, ultrathin coatings applied over a large area are of paramount importance for var... more Nanometer-thick, ultrathin coatings applied over a large area are of paramount importance for various application fields such as biomedicine, space and automotive, organic electronics, memory devices, or energy storage devices. So far wet chemical deposition as a cost-effective, scalable, and versatile method can only be used for thicker deposits. Here the formation of uniform ultra-thin coatings with thicknesses below 15nm using a nature-inspired, roll-to-roll compatible Spray-on-Screen (SoS) technology is reported. For this, the finite micro-droplet generation of Ultrasonic Spray Coating (USSC) is combined with the coating formation from a screen printing mesh. Hydrophobic micro-threads of the mesh, resembling the micro-hair on the legs of water striders, produce millidroplets from microdroplets, and when applying external pressure to the mesh, dynamic wetting is enforced. The proposed technology is applicable for a wide variety of substrates and applications. It is shown by theor...
Smart textiles are a rapidly expanding field in the world of textiles, announcing a new and intri... more Smart textiles are a rapidly expanding field in the world of textiles, announcing a new and intriguing era. Different functionalities can be added to the textile to make the textile smart and intelligent. One of these functionalities is the addition of light-emitting layers or devices that can be incorporated into the textiles. These light-emitting textiles find a broad application in the field of interior and exterior design and wearable applications. Depending on the application, two light-emitting devices, the alternating current powder electroluminescent (ACPEL) device and the organic light emitting diode (OLED), both consisting out of a stack of thin layers, can be directly printed on top of the textile substrates. With its relatively high AC voltage of 50–200 V, the ACPEL device is more suited for interior and exterior applications while the OLED with a low DC voltage of 3–5 V is a perfect candidate for wearable applications. To maintain typical textile properties such as flex...
The heat transfer method can be used in biosensing applications to detect analytes. Until now, th... more The heat transfer method can be used in biosensing applications to detect analytes. Until now, the heater module always consisted of a heating element and copper heat-spreader. In order to improve the sensitivity of the sensors, a planar heatingand sensing element is proposed. Milling of circuit boards is an established method for creating planar heaters. An alternative has recently emerged in the form of inkjet printing. In this work, a comparison of the heat distribution is made between milled circuit board heaters on a fibreglass substrate and inkjet printed heaters on a flexible PET substrate. [1]
This work was financially supported by the CORNET project POLEOT (IWT-TETRA-120629) and Hasselt U... more This work was financially supported by the CORNET project POLEOT (IWT-TETRA-120629) and Hasselt University (BOF).
Smart textiles are an expanding field with much potential and arouse interest in the R&D sphe... more Smart textiles are an expanding field with much potential and arouse interest in the R&D sphere and industry. These find vast applications in engineering, healthcare and fashion, and contribute additional functionality and intelligence to structures. Quiet often the intelligence of such smart structures is supported by electronics that ensure functions such as data transfer and analysis for monitoring systems. Moreover, many smart textile systems require also energy source. At present, there is a great variety of scenarios to implement the joining of the functional textile compounds and electronics. Nevertheless, the joining technology is one the key challenges for smart textile developers, especially regarding wearable applications. Smart luminous textiles are of great interest for applications such as clothing and interior design and visual merchandizing. Moreover, luminous textiles are beneficial for protective clothing and sportswear in order to insure better visibility of the wear and interactive design for non-verbal communication. Additionally, luminous textiles have potentials for healthcare and medicine applications such as phototherapy. At present, such smart textiles are mostly limited to LED integration. Despite well-developed techniques for LED attachment onto textiles, power sourcing and controlling of the electronics for more complex LED matrixes remains a field for technology improvement. Moreover, OLED technology is more preferable for some applications due to fragility of more sophisticated and large-scale LED matrixes. This study presents a preliminary study for reversible joining of textiles and electronics within a novel concept for electroluminescence (EL) towards Organic Light Emitting Devices (OLED) implementations by printing technology. Technical embroidery is suggested as a promising technology that ensures continuous manufacturing of the functional textile compounds, electro-conductive paths and the joining platforms for electronic interconnections with active textiles. A novel concept for EL is developed in order to continuously implement the functional textile elements and ensure an efficient solution for the smart textile bonding with electronics. Regarding specifics of the development usage conditions, solutions for reversible joining are in the focus of the study. Finally, a concept of the bonding module for the electro-conductive platforms is described to be applied to custom developed EL structures on textiles.
The authors would like to thank the research and funding partners of the CORNET project POLEOT (I... more The authors would like to thank the research and funding partners of the CORNET project POLEOT (IWT-TETRA 120629) and the INTERREG project ORGANEXT.
The author would like to thank the financial contribution from the CORNET project POLEOT (IWT-TET... more The author would like to thank the financial contribution from the CORNET project POLEOT (IWT-TETRA-120629) and the support from BOF (Bijzonder OnderzoeksFonds) of Hasselt University.
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