Phthalocyanine interfaces with MoS2(0001): The effect of the metal centre on the charge transfer

• Published in: Applied surface science 2025-02, Vol.682, p.161672, Article 161672
• Main Authors: Drivas, Charalampos, Kennou, Stella, Kyriakou, Georgios
• Format: Article
• Language: English
• Subjects: Charge transfer; Interfaces; MoS2; Phthalocyanines; UPS; XPS
• ISSN: 0169-4332
• DOI: 10.1016/j.apsusc.2024.161672

[Display omitted] •In situ XPS/UPS of Cu, Mn and non-metallated phthalocyanines on 2H-MoS2 (0001)•Phthalocyanine metal centre acts as a channel for charge transfer.•Phthalocyanine deposition leads to electron doping of the MoS2 surface.•VB/HOMO and CB/LUMO offsets strongly depend on the Phthalocyanine metal centre. Semiconductor interfaces are of great importance nowadays because of their tuneable properties. In this study, the interfaces of metal phthalocyanines (H2Pc, MnPc, and CuPc) and a single crystal of 2H-MoS2 are studied by X-ray and Ultraviolet photoelectron spectroscopies to understand their physiochemical properties. For this purpose, the molecules were in situ deposited onto a clean substrate stepwise and after each deposition step, the interface was characterised. The obtained results show that all three molecules exhibit a flat-lying orientation on the substrate. Additionally, it is evident that the metal centre acts as a channel for electron transfer from the molecules to the substrate. Finally, the electron and hole barriers were calculated and the CuPc demonstrated the highest ones with values of 1.8 eV and 0.8 eV respectively.