Project F – Room Temperature Aerosol Deposition of Lead-Free Ferroelectric Films for Energy Conversion Systems

The focus of this project is the investigation of lead-free ferroelectrics films for energy conversion applications using aerosol deposition (AD). During deposition, micron-sized particles are accelerated through a nozzle by a carrier gas into a vacuum chamber. The particles impact a substrate, breaking apart and forming a dense (>96 %) ceramic film at room temperature with an exceptionally high deposition rate. Because AD is a room temperature process, deposition of metallic, ceramic, semi-conductor, glass, or plastic particles on various substrates is possible. This is not achievable with other film deposition techniques requiring high temperature densification. Multi-layer composite structures consisting of alternating layers of different materials (2-2 connectivity) (Figure 1a) or mixed composite structures (0-3 connectivity) as well as porous films structures can also be produced, which could be used to optimize electromechanical properties or build-in additional functionalities.

The primary research goal is the improved understanding of the deposition of lead-free ferroelectric films for energy conversion applications using AD. Methods to thermally, chemically, and microstructurally tune the residual stress in the films will also be investigated, in addition to enhancement in electromechanical coupling using ceramic/ceramic composites and novel 3D film structures.

Projekte

Beteiligte Wissenschaftler

Publikationen

• Cicconi MR., Khansur NH., Eckstein U., Werr F., Webber KG., de Ligny D.:
  Determining the local pressure during aerosol deposition using glass memory
  In: Journal of the American Ceramic Society 103 (2020), S. 2443-2452
  ISSN: 0002-7820
  DOI: 10.1111/jace.16947
• Martin A., Khansur NH., Eckstein U., Rieß K., Kakimoto Ki., Webber KG.:
  High temperature piezoelectric response of polycrystalline Li-doped (K,Na)NbO3 ceramics under compressive stress
  In: Journal of Applied Physics 127 (2020), Art.Nr.: 114101
  ISSN: 0021-8979
  DOI: 10.1063/1.5134554
• Mashkov O., Körfer J., Eigen A., Yousefi Amin AA., Killilea NA., Barabash A., Sytnyk M., Khansur NH., Halik M., Webber KG., Heiß W.:
  Effect of Ligand Treatment on the Tuning of Infrared Plasmonic Indium Tin Oxide Nanocrystal Electrochromic Devices
  In: Advanced Engineering Materials (2020)
  ISSN: 1438-1656
  DOI: 10.1002/adem.202000112
• These A., Khansur NH., Almora O., Luer L., Matt G., Eckstein U., Barabash A., Osvet A., Webber KG., Brabec C.:
  Characterization of Aerosol Deposited Cesium Lead Tribromide Perovskite Films on Interdigited ITO Electrodes
  In: Advanced Electronic Materials (2021)
  ISSN: 2199-160X
  DOI: 10.1002/aelm.202001165
• Rieß K., Khansur NH., Martin A., Benčan A., Uršič H., Webber KG.:
  Stress- And frequency-dependent properties of relaxor-like sodium bismuth titanate
  In: Physical Review B 103 (2021), Art.Nr.: 094113
  ISSN: 0163-1829
  DOI: 10.1103/PhysRevB.103.094113