A5032825601- Organic Electronics and Photovoltaics
- Conducting polymers and applications
- Thin-Film Transistor Technologies
- Advanced Sensor and Energy Harvesting Materials
- solar cell performance optimization
- Silicon and Solar Cell Technologies
- Nanomaterials and Printing Technologies
- Advanced Memory and Neural Computing
- Recycling and Waste Management Techniques
- Fuel Cells and Related Materials
- Electrochemical sensors and biosensors
- Analytical Chemistry and Sensors
- Advanced Battery Materials and Technologies
- Gold and Silver Nanoparticles Synthesis and Applications
- Supercapacitor Materials and Fabrication
- Advanced DC-DC Converters
- Extraction and Separation Processes
- Additive Manufacturing and 3D Printing Technologies
- Green IT and Sustainability
- Sustainable Supply Chain Management
- Electrowetting and Microfluidic Technologies
- Electrospun Nanofibers in Biomedical Applications
- Innovative Microfluidic and Catalytic Techniques Innovation
- Advanced Physical and Chemical Molecular Interactions
- Induction Heating and Inverter Technology
Tieto (Finland)
2014-2024
VTT Technical Research Centre of Finland
2014-2024
Aalto University
2010
University of Helsinki
2005
Inline printing and coating methods have been demonstrated to enable a high technical yield of fully roll-to-roll processed polymer tandem solar cell modules. We demonstrate generality by employing different material sets also describe how the ink systems must be carefully co-developed in order reach ambitious objective printed coated 14-layer flexible stack. The methodologies involved are flexographic printing, rotary screen slot-die coating, X-ray scattering, electrical testing...
We present a cost analysis based on state of the art printing and coating processes to fully encapsulated, flexible ITO- vacuum-free polymer solar cell modules. Manufacturing data for both single junctions tandem are presented analyzed. Within this calculation most expensive layers processing steps identified. Based large roll-to-roll experiments exact material consumptions were determined. In addition pilot scale experiment here, projections medium scenarios serve as guide achieve targets 5...
We describe the fabrication of roll-to-roll (R2R) printed organic photovoltaic (OPV) modules using gravure printing and rotary screen-printing processes. These two-dimensional techniques are differentiating factors from coated OPVs enabling direct patterning arbitrarily shaped sized features into visual shapes and, increasing freedom to connect cells in modules. The inverted OPV structures comprise five layers that either or patterned an R2R process. examined rheological properties inks used...
The comparison of solution processed organic photovoltaics with two roll-to-roll coated electron transport layers (ETL), as well printed grid or solid back electrodes provides insight into the future R2R fabricated architectures. variation in performance slot-die zinc oxide (ZnO) versus tin (SnO2), showed a clear dependence on spectrum illumination source. It was found that under indoor light conditions (200–1000 lux LED and fluorescent sources) SnO2 outperformed ZnO highest efficiencies...
Abstract Modern batteries are highly complex devices. The cells contain many components—which in turn all have variations, both terms of chemistry and physical properties. A few examples: the active materials making electrodes coated on current collectors using solvents, binders additives; multicomponent electrolyte, contains salts, electrolyte can also be a solid ceramic, polymer or glass material; separator, which made fibres, polymeric, composite, etc. Moving up scale these components...
Abstract Lignin is a nature’s wonder most abundant aromatic biopolymer and promising precursor for wide range of sustainable carbon materials (CMs). However, the effects lignin structural heterogeneity on properties performance lignin-based CMs are still poorly understood. In this paper, we address influence activated carbons (ACs). Taking two structurally different kraft (KL) hydrolysis (HL) lignins, show that they result into ACs with electrochemical in supercapacitor application. similar...
Room temperature substrate-facilitated sintering of nanoparticles is demonstrated using commercially available silver nanoparticle ink and inkjet printing substrates. The mechanism based on the chemical removal stabilizing ligand shown to provide conductivity above one-fourth that bulk silver. A novel approach attach discrete components printed conductors presented, where sintered provides metallic interconnects with good electrical mechanical properties. process for chip-on-demand assembly...
Abstract We present a gravure printing process for zinc oxide (ZnO) nanoparticle ink to be used as hole‐blocking layer in inverted organic solar cells, enabling the production of patterned devices with freedom design. The printability is optimized pilot‐scale roll‐to‐roll (R2R) process, leading smooth layers having thickness few tens nanometers. properties printed ZnO film are further using R2R post‐printing plasma treatment, which leads increased adhesion and power conversion efficiency...
Indene‐C60‐bisadduct (ICBA) can represent an excellent choice as acceptor of organic solar cells due to the, at most, similar cost, higher efficiency, and open‐circuit voltage ( V OC ) obtained in small‐scale devices compared phenyl[60]butyrate methyl ester ([60]PCBM). We have investigated ICBA printed assessed the upscale printing process a roll‐to‐roll (R2R) pilot production. Performances poly(3‐hexylthiophene):ICBA are confirmed be superior [60]PCBM. Using large scale 2D R2R techniques,...
We demonstrate the production of organic bottom gate transistors with self-aligned electrodes, using only continuous roll-to-roll (R2R) techniques. The self-alignment allows accurate <5 µm layer-to-layer registration, which is usually a challenge in high-speed R2R environments as standard registration methods are limited to millimeter range—or, at best, tens if online cameras and automatic web control utilized. improved enables minimizing overlap between source/drain electrodes electrode,...
Understanding the phenomena at interfaces is crucial for producing efficient and stable flexible organic solar cell modules. Minimized energy barriers enable charge transfer, good adhesion allows mechanical environmental stability thus increased lifetime. We utilize here inverted module stack standard photoactive materials (a blend of poly(3-hexylthiophene) [6,6]-phenyl C61 butyric acid methyl ester) to study in a pilot scale large-area roll-to-roll (R2R) process. The results show that work...
We report self-assembly and electronic conductivity transitions in polyaniline (PANI) where the iminic nitrogens are protonated by sulfonic acid-terminated low molecular weight poly(ethylene oxide) CH3−(O−C2H4−)46−CH2−SO3H (PEOSA), i.e., which contains 46 ethylene oxide repeat units. The complex PANI(PEOSA)0.5 self-assembles due to comb-shaped architecture consisting of PANI backbone supramolecular PEO side chains, as characterized using small- wide-angle X-ray scattering (SAXS WAXS)...
Abstract Roll‐processed, indium tin oxide (ITO)‐free, flexible, organic tandem solar cells and modules have been realized used in round‐robin studies as well parallel inter‐laboratory stability studies. The cells/modules show no significant difference comparison to their single‐junction counterparts the use of a consensus tool for evaluation cell parameters is judged just viable devices. were conducted according testing protocols ISOS‐D‐2, ISOS‐D‐3, ISOS‐L‐2, spite much more complicated...
Sustainability and circular economy cover the principles of designing out waste pollution, keeping products materials in use, regenerating natural systems. Due to global trends (eg. increasing e‐waste material consumption) sustainability goals also electronics industry has consider how increase its products, operations service models. VTT demonstrated sustainable electronic solutions by developing bio‐based renewable processing, utilizing high‐speed printing hybrid integration manufacturing...