Highly crystalline and uniform conjugated polymer thin films by a water-based biphasic dip-coating technique minimizing the use of halogenated solvents for transistor applications

Abstract

A water-based biphasic dip-coating method with a solvent additive minimized the use of halogenated solvent and produced a uniform, smooth and crystalline conjugated polymer thin film.

Experimental investigations into additive manufacturing of styrene-ethylene-butylene-styrene block copolymers using solvent cast 3D printing technique

“…Furthermore, it can be seen from Figure 15 that cyclopentane-based ink samples showed the highest solvent evaporation rate. This can be attributed to the difference in the boiling point of different solvents, which in turn affect the evaporation rate of the ink samples (Chinaglia et al , 2010; Kwon et al , 2019). Cyclopentane, having a boiling point of 49.2°C, possessed the highest evaporation rate.…”

Simultaneous Performance and Stability Improvement of a p-Type Organic Electrochemical Transistor through Additives

“…One approach to change the electrochemical response of a mixed conductor, which depends on the packing arrangement of its chains on the substrate, is using additives. , To change the film microstructure, we used chlorobenzene (CB) as a cosolvent and added a fixed concentration of it to the polymer solution in chloroform. Since CB has a higher boiling point than chloroform, evaporation of the film will take longer and allow more time for the polymer chains to self-assemble and reorient, ideally into favorable directions for charge transport. − CB also does not fully dissolve the polymer at the same concentration as chloroform (4 mg/mL), which can form aggregates in the solution when blended. We evaluated the OECT performance of p­(g3T2-T) channels cast from three different volume concentrations of CB (10, 20, and 30 vol %) while keeping the overall concentration of the polymer and processing conditions constant.…”