A5045131667- Organic Light-Emitting Diodes Research
- Organic Electronics and Photovoltaics
- Molecular Junctions and Nanostructures
- Machine Learning in Materials Science
- Electron and X-Ray Spectroscopy Techniques
- Conducting polymers and applications
- Advanced Chemical Physics Studies
Max Planck Institute for Polymer Research
2023-2024
A common obstacle of many organic semiconductors is that they show highly unipolar charge transport. This unipolarity caused by trapping either electrons or holes extrinsic impurities, such as water oxygen. For devices benefit from balanced transport, light-emitting diodes, solar cells and ambipolar transistors, the energy levels are ideally situated within an energetic window with a width 2.5 eV where strongly suppressed. However, for band gap larger than this window, used in blue-emitting...
Injected or photogenerated charge carriers in disordered organic semiconductors relax energy to form an occupied density of states (ODOS) that is inherently difficult probe. Thus little known about nonequilibrium ODOS properties, although they are important e.g. solar cells and LEDs. This work presents optical technique for monitoring the distribution relaxed at low temperatures. The forms under conditions always narrower than full DOS, a universal ratio 2/3 reproduced by kinetic Monte Carlo...
Abstract Thin films of molecular materials are commonly employed in organic light‐emitting diodes, field‐effect transistors, and solar cells. The morphology these is shown to depend heavily on the processing used during manufacturing, such as vapor co‐deposition. However, prediction processing‐dependent morphologies has until now posed a significant challenge, particularly cases where self‐assembly ordering involved. In this work, method developed based coarse‐graining that capable...