A5002452486- Advanced Sensor and Energy Harvesting Materials
- Conducting polymers and applications
- Organic Electronics and Photovoltaics
- Quantum Dots Synthesis And Properties
- Nanomaterials and Printing Technologies
- Thin-Film Transistor Technologies
- Carbon Nanotubes in Composites
- Nanofabrication and Lithography Techniques
- Chalcogenide Semiconductor Thin Films
- Nanocluster Synthesis and Applications
- Perovskite Materials and Applications
- Advancements in Semiconductor Devices and Circuit Design
- Neuroscience and Neural Engineering
- Semiconductor Lasers and Optical Devices
- Recycling and Waste Management Techniques
- Sensor Technology and Measurement Systems
- Smart Materials for Construction
- Additive Manufacturing and 3D Printing Technologies
- 2D Materials and Applications
- Organic Light-Emitting Diodes Research
- Innovative Energy Harvesting Technologies
- Gas Sensing Nanomaterials and Sensors
- Supercapacitor Materials and Fabrication
- Nanotechnology research and applications
- Mechanical Behavior of Composites
National Research Council Canada
2015-2024
Welsh Centre for Printing and Coating
2013
Swansea University
2013
Ag2Te colloidal quantum dots (QDs) are an excellent nanomaterial for applications in the second near-infrared window (NIR-II, 1000–1700 nm). However, synthesis with narrow size distribution and high photoluminescence yield (PL QY) is challenging. In this study, we systematically investigate critical parameters affecting organic phase process. We show that Ag/Te feed ratio leads to smaller higher PL QY; under 4:1 molar ratio, addition of secondary phosphine narrower stability; 6:1 excess...
Fibre reinforced pre-preg systems have very good in plane properties, however they are weak their through thickness (z) direction. This research aims to address this issue by adding plasma treated carbon nanotubes (CNTs) between the prepreg plies using a simple drawdown coating procedure. The significant test result shows with relatively low areal density (1.2 g/m2) propagation mode I toughness can be improved up 46%. Crack deviation leading increased glass fibre bridging was observed for...
Cathodic electrochemical intercalation/exfoliation of transition metal dichalcogenides (TMDs) with bulky tetraalkylammonium-based cations is gaining popularity as it avoids the semiconducting (2H) to metallic (1T) phase transformation in TMDs like molybdenum disulfide (MoS
Biosensing applications are driving an increase in demand for low-cost photodetectors with sensitivity between 1000 and 1400 nm. Recently, the of Ag2Se colloidal quantum dot based devices this wavelength range has been observed. In work we make first demonstration photodiode device entire range. By employing secondary phosphine to elevate precursor reactivity, achieved accurate size control nanocrystals a distinct excitonic absorption peak. These were deposited from solution into mesoporous...
Abstract This study demonstrates fully solution‐processed polymeric multilayer piezoelectric devices. The key challenge, the effective control of redissolution issue that will cause severe electrical shorting and inconsistent output, is overcome by searching for using a solvent offers adequate solubility but extremely slow dissolution polymer. screening methodology established demonstrated. process parameters systematically optimized to maximize performance devices can output high charge...
In this paper we report on the synthesis and development of vanadium oxide precursor flexographic ink for printing hole-transporting layers in organic solar cells. For inks, a sol-gel methodology was utilized. By modifying alkoxide with right type coordinating ligands stable flexoprintable has been successfully developed. Flexo-printing afforded smooth uniform films top PCDTBT:PC<sub>70</sub>BM films. The conversion synthesized film into corresponding layer followed by DSC/TGA XPS analyses....
Within the field of organic thin-film transistors (OTFTs), a large variety materials are available. As consequence, it may not be possible for one circuit model to accurately replicate behavior all OTFT devices. We propose modifications two popular models in order better match characteristics observed devices manufactured using our system. Using measured data complementary n- and p-type devices, modeling parameters extracted through optimization. Due ubiquitous use square-law characterize...
Printed humidity sensors on flexible substrates has potential to be low cost platform. A novel capacitance-humidity sensor was screen printed with silver electrodes and cellulose acetate butyrate (CAB) as the dielectric polyethylene terephthalate (PET) substrate. The parallel plate design achieves capacitance between 400-500pF at ambient conditions. This study found that exhibits superior linearity from 10-70%RH R <sup xmlns:mml="http://www.w3.org/1998/Math/MathML"...
The efficacy of drug plans can critically depend on patient's adherence to a prescribed intake schedule. Detection the rupture blisters in packages through circuits printed package allows medical practitioners monitor compliance. In current state art, each blister is overprinted with conductive track and their detected by dedicated pin reusable integrated circuit (IC) that records communicates results. this paper, we are reporting development smart based multiplexed detection resistive...
Low-cost photodetectors with sensitivity in the second near-infrared window (NIR-II, 1000–1700 nm) are highly demanded. Recently, we made first demonstration of an Ag 2 Se colloidal quantum dots (QDs) photodiode up to 1200 nm. By employing secondary phosphine elevate precursor reactivity, QDs a distinct excitonic absorption peak was achieved. These nanocrystals were deposited from solution into mesoporous TiO scaffold increase light and charge separation reduce exciton diffusion length....
Abstract The ability to fabricate electronics by printing has enabled an array of technologies that can create intelligent or smart packaging; however, this come at the cost recyclability. Selection materials compatible with recycling streams is possible, such as paperboard and carbon inks, but there a trade-off in terms performance, flexibility reliability. A major challenge for use delamination deformation when subject small bend radii. substrate tendency crease bent beyond critical...
Semiconducting nanocrystals (colloidal quantum dots, QDs) have superior optical properties and solution processibility. Silver selenide dots are important nanomaterials with absorption peak extending from ~880nm to ~1200nm. Compared the lead-based counterparts, Ag <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</sub> Se QDs less developed their application is explored. This in part due difficult control of size distribution, resulting broad or...
The next generations of wearable electronics require high-performance, low-cost, thin, and flexible 2-D electronic components, e.g. capacitors transistors. commercial feasibility these technologies relies on printable, high throughput, highly electronically-conductive, inexpensive silver electrodes/current collectors to replace gold counterparts. However, silver-based devices are prone failure due corrosion forming resistive oxides or dendrites in aqueous environments (as shown Figure 1a)....
We report the development of inkjet-printed organic thin-film transistors (OTFTs), inverters and logic circuits on PET substrate. The mobility 1 cm 2 /Vs 0.1 achieved p-type n-type printed OTFTs with an operation voltage 15 V. uniform thin dielectric layer by introducing coffee ring effect printing process. A gain value 24 obtained from CMOS inverter device exhibits excellent air-stability without encapsulation. Our results demonstrated potential developed for flexible electronics in near future.
There is an increasing awareness of the dangers posed by elevated radon concentration in indoor spaces. This has led to demand for improved measurement solutions which enable low-cost, accurate, and practical concentration. In this work, use screen printing fabricate electrostatic concentrator detection demonstrated. An origami-inspired design enables printed electronics as a manufacturing technology with resulting reduction component cost weight. A new metric such concentrators known active...