Publications by authors named "Ewald Johannes"
Article Synopsis
- Semiconductor nanoplatelets can emit polarized light effectively by aligning them in ordered monolayers during the self-assembly process.
- This alignment is achieved by controlling the solvent evaporation rate, eliminating the need for additives that could impair performance.
- The resulting films show enhanced charge transport and tunable optical properties, which could lead to advancements in optoelectronic applications.
PEG is the gold standard polymer for pharmaceutical applications, however it lacks degradability. Degradation under physiologically relevant pH as present in endolysosomes, cancerous and inflammatory tissues is crucial for many areas. The authors present anionic ring-opening copolymerization of ethylene oxide with 3,4-epoxy-1-butene (EPB) and subsequent modification to introduce acid-degradable vinyl ether groups as well as methacrylate (MA) units, enabling radical cross-linking.
View Article and Find Full Text PDFRemoval of Surface Oxygen Vacancies Increases Conductance Through TiO Thin Films for Perovskite Solar Cells.
J Phys Chem C Nanomater Interfaces
June 2019
We report that UV-ozone treatment of TiO anatase thin films is an efficient method to increase the conductance through the film by more than 2 orders of magnitude. The increase in conductance is quantified via conductive scanning force microscopy on freshly annealed and UV-ozone-treated TiO anatase thin films on fluorine-doped tin oxide substrates. The increased conductance of TiO anatase thin films results in a 2% increase of the average power conversion efficiency (PCE) of methylammonium lead iodide-based perovskite solar cells.
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