Öffnet in neuem Fenster Opens in a new window Öffnet externe Seite Opens an external site Öffnet externe Seite in neuem Fenster Opens an external site in a new window

Department Solution Processing of Hybrid Materials & Devices

Pillar 2: Ink Design & Chemistry

Solvent chemistry

solution chemistry_SDC
We are working on the understanding of the solvent chemistry and its influence on the film formation.
We correlate the solvent binding strength[link] with formation of solvate intermediate phases my measuring spectroscopic features of solution complexes (UV-VIS & PL)[link] and analysis of colloidal structures analyzed with SAXS [link] and NMR[link].

Green ink design

greenink
We are working on the development of environmentally benign and non-hazardous “green” solvents.

Ink engineering for slot-die coating

2-Me ink design

For slot-die coating, ink engineering is a powerful tool. Tuning the DMSO-content in 2-ME inks prevent the formation of intermediates in MAPbI3 perovskite solar cells [link].

With an new ink design for FAPbI3 perovskite solar cells a devices, with more than 22% PCE have been achieved by slot-die coating [link].

Ink engineering for inkjet printing

Ink additives tune both, the rheology of the solution and the functionality of the processed film. We demonstrate a performance boost by adding PTB7 in our inkjet-printed perovskite layer [link].