Resistive switching devices based on electrocemically produced layers of prussian blue and prussian blue analog compounds

• Applicants: Professor Dr. Christian Müller; Dr. Daniel Wolf
• Subject Area: Synthesis and Properties of Functional Materials ; Experimental Condensed Matter Physics
• Term: since 2023
• Project identifier: Deutsche Forschungsgemeinschaft (DFG) - Project number 531524052

The integration of mostly oxidic functional materials in architectures made of thin layers leads to different electrical and electronic properties, e.g. resistive switching. The observed effects are largely determined by the influence of electrical fields on various charge carriers (electrons, defects, ions). Prussian blue and Prussian blue analogs represent non-oxidic compounds with which various switching phenomena, e.g. unipolar, bipolar or multipolar switches, can be implemented by varying the composition and the layered architecture. As part of the project, resistive switches based on Berlin blue and Berlin blue analog layers or layer structures are to be produced electrochemically, and their intrinsic interactions and their effects on the electrical switching mechanism are to be investigated. In this context, the influence of ion migration, electron migration, defects in the crystal lattice, and disorder on the percolation structures, as well as the interaction between individual percolation structures, will be analyzed in more detail. Control parameters for uniform and stable switching behavior are to be identified. At the same time, the micro- and nanopatterning of the layers are planned in order to implement compact and powerful switching elements for future applications. The underlying macroscopic and microscopic mechanisms are to be investigated with a combination of modern electrical, electron microscopic, electron spectroscopic, and X-ray methods.

• DFG Programme: Research Grants
• International Connection: Brazil
• Co-Investigators: Dr.-Ing. Lars Giebeler; Dr. Thomas Mühl
• Cooperation Partner: Dr. Itamar Neckel