1. Organic multi-ferroics
Nonvolatile electronic memories (NVMs) retain data when the power is turned off. Ferromagnetism is the basis for NVM devices such as hard disk drives, where magnetization is used to store information. Another physical property that is heavily investigated for NVM application is ferroelectricity; the ability of certain dielectric materials to preserve their polarization state after removal of the electric field. Ferroelectricity is therefore based on electronic charges whereas ferromagnetism is based on the spin of the electrons. The origin of ferromagnetism and ferroelectricity is therefore different. Presence of a coupling between electrical polarization and magnetization holds a great promise for novel multi-functional NVM devices that can be written electrically and read magnetically or vice versa. Materials that exhibit the coupling are called multi-ferroics. Our research is focused on development of organic materials that show multi-ferroic properties and to integrate them in an electronic device.
2. Organic ferroelectrics
NVM devices based on ferroelectricity can be read, programmed and erased electrically. Ferroelectrics are among the promising candidates for NVM applications. Organic ferroelectrics have emerged in microelectronics as an attractive material for NVM devices, where the memory functionality is obtained by the polarization of the ferroelectric. Depending on the polarization state of the ferroelectric, the device is programmed into binary “0” and “1” logic states. NVM devices based on organic ferroelectrics are capacitors, transistors and diodes. Our focus is to understand the physics of organic ferroelectrics and that of the NVM devices fabricated thereof.
3. Metal-Organic Frameworks
Metal Organic Frameworks (MOFs), a new class material, are becoming increasingly popular for diverse applications. MOFs constitute of inorganic metallic clusters that are joined by an organic linker. Therefore MOFs are solids with a well-defined structure. The number of possibilities to design, engineer, and modify MOFs is almost unlimited. Our focus is to study MOFs and their opto-electronic properties and to apply them as the active material in devices such as light-emitting diodes and transistors.
We are scientists and by definition we are curious. So, once in a while we do something that might not be directly linked to our main research themes. The topics in which we have been involved are divers, molecular electronics, organic semiconductors, graphene and metal-oxides semiconductors, to name a few.