In fall 2016, cfaed carried out its first Cluster-wide Scientific Image Contest. 22 different researchers or teams participated and sent in around 60 images. At the General Assembly in December Prof. Fettweis revealed the winners and handed over the awards. Now we are happy to present the winning pictures on our website and in the social channels!
Congratulations to the winners of the cfaed Scientific Image Competition!
Organized by the network “Absol(E)vent’ the cfaed - Chair for Organic Devices hosted an event to present “Printable solar cells, OLEDs and transistors” to a group of 20 former members of TU Dresden. After a little introduction of Prof. Stefan Mannsfeld and Prof. Sebastian Reineke on the topic there was a tour through the laboratories at the historic “Bienert-Villa” to show printable electronic on flexible materials. It was a successful event with a lot of interesting questions and discussions and a good opportunity to show our scientific work.
Welcome to Yichu Zheng, our new PhD student. Yichu received her Masters degree from East China University of Science and Technology in January 2016. We are happy to have her at the Chair for Organic Devices.
After we previously demonstrated, that controlling the ink-flow with our FLUENCE technique leads to massive improvements in the film structure and performance for small organic semiconductor inks, a new paper, published in Nature Communications, describes our modification of the FLUENCE approach to work with conjugated semiconducting polymers. The question here was: can we achieve similar control over the morphology of polymer films as we achieved for the small molecules. The answer is yes, but in order to work for polymers, the structures controlling the ink flow needed to be shrunk from tens of micrometers down to as small as possible. New shearing blades with photo-lithographic structured pillars of 1-2 micrometer diameter and pitch were produced. These specially structured blades improved the morphology of printed polymer films for organic solar cells and enhanced all metrics of solar cell device performance across various printing conditions, specifically leading to higher short-circuit current, fill factor, open circuit voltage and significantly reduced device-to-device variation.