Your browser doesn't support javascript.
loading
Investigation into electronic interaction and work function tuning of phthalocyanine molecules and graphene interfaces.
Garcia-Basabe, Yunier; Suenson Cardoso, Matheus; Lima, Bruno da Silva; Mendoza, Cesar D; Freire Junior, Fernando Lázaro; Larrude, Dunieskys G.
Afiliação
  • Garcia-Basabe Y; Universidade Federal da Integração Latino-Americana, UNILA, 85867-970, Foz do Iguaçu, Brazil. yunier.basabe@unila.edu.br.
  • Suenson Cardoso M; School of Engineering, Mackenzie Presbyterian University, São Paulo 01302-907, Brazil.
  • Lima BDS; School of Physics and Astronomy, University of Manchester, Manchester M13 9PL, UK.
  • Mendoza CD; School of Engineering, Mackenzie Presbyterian University, São Paulo 01302-907, Brazil.
  • Freire Junior FL; Department of Physics, Pontifícia Universidade Católica do Rio de Janeiro, 22451-900, Rio de Janeiro, Brazil.
  • Larrude DG; Department of Physics, Pontifícia Universidade Católica do Rio de Janeiro, 22451-900, Rio de Janeiro, Brazil.
Phys Chem Chem Phys ; 26(37): 24438-24446, 2024 Sep 25.
Article em En | MEDLINE | ID: mdl-39259219
ABSTRACT
Understanding the interfacial electronic structures of organic semiconductor phthalocyanines (MePc) and graphene is essential for their practical application in various fields. In this study, we investigated the electronic structure and the tuning of the work function of free metal phthalocyanine (Pc4), cobalt phthalocyanine (CoPc), and copper phthalocyanine (CuPc) molecules deposited on a graphene monolayer using X-ray photoelectron spectroscopy (XPS) and ultraviolet photoelectron spectroscopy (UPS). We found that the functionalization of MePc molecules induces p-doping to the graphene substrate due to the charge transfer mechanism with the MePc molecule. XPS analysis shows that the electronic interaction at the interface between Pc molecules and graphene substrate mainly occurs through the pyrrole species. Comparatively, it was observed that the electronic coupling between graphene and CuPc is relatively stronger than that between CoPc and graphene. The electronic interaction of the CuPc/Gr sample principally occurs through the Cu2+ 3d states of CuPc, the molecule, and the graphene 2p π states. This electronic interaction increases the work function of the graphene substrate to 5.75 eV, 6.05 eV, and 6.12 eV after depositing the Pc4, CoPc, and CuPc molecules, respectively. These results show that the MePc/Gr samples investigated in this study can be considered promising candidates for applications requiring a high work function to increase hole injection efficiency.

Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Idioma: En Revista: Phys Chem Chem Phys Assunto da revista: BIOFISICA / QUIMICA Ano de publicação: 2024 Tipo de documento: Article País de afiliação: Brasil País de publicação: Reino Unido

Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Idioma: En Revista: Phys Chem Chem Phys Assunto da revista: BIOFISICA / QUIMICA Ano de publicação: 2024 Tipo de documento: Article País de afiliação: Brasil País de publicação: Reino Unido