Researchers working in the European ROLLED project have developed a flexible OLED element that can be mass produced using roll-to-roll printing technology. The OLED elements can be used to add value to product packages.
The new method is considerably cheaper than the traditional manufacturing method. The project was coordinated by VTT,and project participants included INM, CSEM, Ciba, Hansaprint, UPM and PolylC.
At its simplest, the flexible OLED element can be used in product packaging, posters or on supermarket shelves to attract the attention of consumers. It can also be connected to sensors measuring the freshness of food contained in packages. It can also be used to prevent product copying. Arto Maaninen, Technology Manager of the VTT Technical Research Centre in Finland, predicts that the first OLED elements will be in commercial use within a couple of years.
An OLED is an organic light emitting diode, functioning in a way similar to LED lights. Importantly, the power consumption of the OLED light source is very low. Using organic materials, OLED light elements can be affordably manufactured using printing methods on large, flexible surfaces.
The OLED element developed under the ROLLED project is made from organic materials and is encapsulated in a moisture barrier film. The element is 200-250 micrometers thick, the equivalent to three or four sheets of paper.
The manufacturing method was tested in two demonstration tests. The first was presented as a two-colour OLED element that is attached to a product package. When the package is unopened, a green tick is displayed. When the package is opened, the fuse is blown and the tick changes into a red cross.
The second demonstration showed how the OLED element can be powered by an NFC telephone. The EU flag, with the stars representing the Members, was printed on a business card. When an NFC phone was placed near the card, the stars printed with the OLED elements lit up.
The current production cost of an OLED element is tens of cents. Researchers, however, are aiming for some end applications that cost as little as just a few cents. The acquisition cost of the equipment needed in the manufacturing process is clearly lower, and the speed of production is higher than in traditional production methods. The savings achieved can be up to half of the traditional production costs of OLED elements manufactured using a glass substrate.
The expertise developed during the production of flexible OLED elements can also be applied to the printing of solar cells used as a power source for various small portable devices.
The new OLED element was developed in the EU-funded ROLLED project, coordinated by VTT. Within this project VTT developed the printing process, CSEM different patterning technologies, and INM anode inks and barriers. VTT also developed a low work function cathode ink that enhances the functioning of the components by lowering the power supply voltage and reducing power consumption. It can be used in all printable electronics components, including transistors, solar cells and other electronics components.
VTT, Knowledge Solutions | alfa
Fraunhofer researchers develop measuring system for ZF factory in Saarbrücken
21.11.2017 | Fraunhofer-Institut für Zerstörungsfreie Prüfverfahren IZFP
New manufacturing process for SiC power devices opens market to more competition
14.09.2017 | North Carolina State University
Tiny pores at a cell's entryway act as miniature bouncers, letting in some electrically charged atoms--ions--but blocking others. Operating as exquisitely sensitive filters, these "ion channels" play a critical role in biological functions such as muscle contraction and the firing of brain cells.
To rapidly transport the right ions through the cell membrane, the tiny channels rely on a complex interplay between the ions and surrounding molecules,...
The miniaturization of the current technology of storage media is hindered by fundamental limits of quantum mechanics. A new approach consists in using so-called spin-crossover molecules as the smallest possible storage unit. Similar to normal hard drives, these special molecules can save information via their magnetic state. A research team from Kiel University has now managed to successfully place a new class of spin-crossover molecules onto a surface and to improve the molecule’s storage capacity. The storage density of conventional hard drives could therefore theoretically be increased by more than one hundred fold. The study has been published in the scientific journal Nano Letters.
Over the past few years, the building blocks of storage media have gotten ever smaller. But further miniaturization of the current technology is hindered by...
With innovative experiments, researchers at the Helmholtz-Zentrums Geesthacht and the Technical University Hamburg unravel why tiny metallic structures are extremely strong
Light-weight and simultaneously strong – porous metallic nanomaterials promise interesting applications as, for instance, for future aeroplanes with enhanced...
An interdisciplinary group of researchers interfaced individual bacteria with a computer to build a hybrid bio-digital circuit - Study published in Nature Communications
Scientists at the Institute of Science and Technology Austria (IST Austria) have managed to control the behavior of individual bacteria by connecting them to a...
Physicists in the Laboratory for Attosecond Physics (run jointly by LMU Munich and the Max Planck Institute for Quantum Optics) have developed an attosecond electron microscope that allows them to visualize the dispersion of light in time and space, and observe the motions of electrons in atoms.
The most basic of all physical interactions in nature is that between light and matter. This interaction takes place in attosecond times (i.e. billionths of a...
11.12.2017 | Event News
08.12.2017 | Event News
07.12.2017 | Event News
11.12.2017 | Physics and Astronomy
11.12.2017 | Earth Sciences
11.12.2017 | Information Technology