Tuning the carrier injection barrier of hybrid metal–organic interfaces on rare earth-gold surface compounds
Journal article, 2023
Magnetic hybrid metal-organic interfaces possess a great potential in areas such as organic spintronics and quantum information processing. However, tuning their carrier injection barriers on-demand is fundamental for the implementation in technological devices. We have prepared hybrid metal-organic interfaces by the adsorption of copper phthalocyanine CuPc on REAu2 surfaces (RE = Gd, Ho and Yb) and studied their growth, electrostatics and electronic structure. CuPc exhibits a long-range commensurability and a vacuum level pinning of the molecular energy levels. We observe a significant effect of the RE valence of the substrate on the carrier injection barrier of the hybrid metal-organic interface. CuPc adsorbed on trivalent RE-based surfaces (HoAu2 and GdAu2) exhibits molecular level energies that may allow injection carriers significantly closer to an ambipolar injection behavior than in the divalent case (YbAu2).
Author
R. Castrillo-Bodero
Centro de Física de Materiales (CSIC-UPV/EHU)
M. Blanco-Rey
University of the Basque Country (UPV/EHU)
Donostia International Physics Center
Khadiza Ali
Chalmers, Microtechnology and Nanoscience (MC2), Quantum Device Physics
Donostia International Physics Center
Centro de Física de Materiales (CSIC-UPV/EHU)
J. E. Ortega
Centro de Física de Materiales (CSIC-UPV/EHU)
Donostia International Physics Center
University of the Basque Country (UPV/EHU)
F. Schiller
Centro de Física de Materiales (CSIC-UPV/EHU)
Donostia International Physics Center
L. Fernandez
Centro de Física de Materiales (CSIC-UPV/EHU)
Nanoscale
2040-3364 (ISSN) 2040-3372 (eISSN)
Vol. 15 8 4090-4100Subject Categories
Inorganic Chemistry
Materials Chemistry
Condensed Matter Physics
DOI
10.1039/d2nr06440e
PubMed
36744853