Resent research in organic photovoltaics focuses on identifying new high-efficiency polymers and acceptor molecules to reach high power conversion efficiencies (PCEs). To date, a PCE of 13% could be obtained with a PBDB-T-SF: IT-4F based organic solar cell device. However, towards commercialization, the solar cell performance must be optimized and an up-scale of the thin layer deposition is...
The diblock copolymer PMMA-b-PNIPAM in aqueous solution undergoes a reversible coil collapse transition at the lower critical solution temperature (LCST). This characteristic transition temperature can be tuned by the addition of organic co-nonsolvents such as ethanol or acetone. In order to investigate co-nonsolvency behavior in thin film geometry, we perform swelling experiments with a...
Poly(2-alkyl-2-oxazoline)s (POx) are well known for their tunable thermoresponsive properties and good biocompatibility, which make them promising materials for biomedical applications, e.g. as drug carriers. Depending on the type of alkyl substituent, they can be hydrophilic, e.g. poly(2-methyl-2-oxazoline) (PMeOx), thermoresponsive, e.g. poly(2-ethyl-2-oxazoline) (PEtOx) and...
Amphiphilic diblock copolymers having a hydrophobic poly(methyl methacrylate) (PMMA) block and a thermoresponsive poly(N-isopropylacrylamide) (PNIPAM) or poly(N-isopropylmethacrylamide) (PNIPMAM) block form core-shell micelles in aqueous solution. The transition temperature of the PNIPMAM block is 43 oC, thus significantly higher than the one of PNIPAM (32 oC), which has been attributed to...
