Environmentally friendly solar cells
Novel process increases the environmental friendliness of solar cells
Exhibitors
Location
Hall 11, Stand B06
Description
Solar cells based on organic semiconductors offer numerous advantages: they are mechanically flexible and lightweight, offer a high degree of design freedom and can also be manufactured in any color and shape. Organic solar cells are often manufactured using printing and coating processes in a large-scale roll-to-roll process. However, the solvents needed to produce semiconductor inks are often toxic or environmentally incompatible. Researchers at the Lichttechnisches Institut (LTI) at KIT have therefore been looking for an approach that does not require toxic solvents. Instead of dissolving the organic semiconductors for the production of the semiconductor ink, they are dispersed in the form of nanoparticles in alcohol or other non-toxic media. The biggest challenge here is stabilizing the nanoparticles in the dispersion medium. Without further measures, the nanoparticles would stick together over time and precipitate out of the dispersion. To prevent this, the researchers mix another compound into the dispersion to electrically charge the nanoparticles. With this electrical doping, a targeted electrostatic stabilization of the introduced nanoparticles is achieved for the first time without negatively affecting the electronic function of the subsequent semiconductor layers. KIT's novel process for stabilizing semiconductor nanoparticles in printable inks enables, on the one hand, more environmentally friendly production and, on the other hand, expands the range of available organic semiconductors in printing and coating processes. The process is being continuously optimized in order to be able to process even more semiconductors in the future and thus expand the range of applications to other components, such as organic light-emitting diodes or printed electronics in the broadest sense.
You can get an overview of this technology at KIT stand. More details can be exchanged individually with the responsible scientific employees of KIT after the industry fair.
Contact
Karlsruher Institut für Technologie (KIT)
- Kaiserstr. 12
- 76131 Karlsruhe
- Germany
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