Tuning the carrier injection barrier of hybrid metal-organic interfaces on rare earth-gold surface compounds

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...

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Bibliographic Details
Published in:Nanoscale 2023-02, Vol.15 (8), p.49-41
Main Authors: Castrillo-Bodero, R, Blanco-Rey, M, Ali, K, Ortega, J. E, Schiller, F, Fernández, L
Format: Article
Language:English
Subjects:
Carrier injection
Data processing
Electronic structure
Electrostatics
Gadolinium
Metal phthalocyanines
Molecular energy levels
Quantum phenomena
Spintronics
Substrates
Tuning
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Summary: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 REAu 2 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 (HoAu 2 and GdAu 2 ) exhibits molecular level energies that may allow injection carriers significantly closer to an ambipolar injection behavior than in the divalent case (YbAu 2 ). Adjustment of the HOMO binding energy in a hybrid metal-organic interface due to rare-earth valence selection in rare earth-gold substrates.
ISSN:2040-3364
2040-3372
2040-3372
DOI:10.1039/d2nr06440e