title: Multi-Component Organic Layers on Metal Substrates.
abstract: Increasingly high hopes are being placed on organic semiconductors for a variety of applications. Progress along these lines, however, requires the design and growth of increasingly complex systems with well-defined structural and electronic properties. These issues have been studied and reviewed extensively in single-component layers, but the focus is gradually shifting towards more complex and functional multi-component assemblies such as donor-acceptor networks. These blends show different properties from those of the corresponding single-component layers, and the understanding on how these properties depend on the different supramolecular environment of multi-component assemblies is crucial for the advancement of organic devices. Here, our understanding of two-dimensional multi-component layers on solid substrates is reviewed. Regarding the structure, the driving forces behind the self-assembly of these systems are described. Regarding the electronic properties, recent insights into how these are affected as the molecule's supramolecular environment changes are explained. Key information for the design and controlled growth of complex, functional multicomponent structures by self-assembly is summarized.
authors.affiliation: Donostia International Physics Center, E-20018, Paseo Manuel Lardizabal 4, Donostia-San Sebastián, Spain.|Centro de Fisica de Materiales CSIC/UPV-EHU-Materials Physics Center, E-20018, Donostia-San Sebastián, Spain.
authors.forename: Elizabeth
authors.initials: E
authors.lastname: Goiri
authors.affiliation: Donostia International Physics Center, E-20018, Paseo Manuel Lardizabal 4, Donostia-San Sebastián, Spain.|Centro de Fisica de Materiales CSIC/UPV-EHU-Materials Physics Center, E-20018, Donostia-San Sebastián, Spain.|Institut des NanoSciences de Paris, CNRS, UMR 7588, 4 Place Jussieu, Paris, 75005, France.
authors.forename: Patrizia
authors.initials: P
authors.lastname: Borghetti
authors.affiliation: Centro de Fisica de Materiales CSIC/UPV-EHU-Materials Physics Center, E-20018, Donostia-San Sebastián, Spain.|Physics Dept., Faculty of Science, Al-Azhar University, 11754, Cairo, Egypt.
authors.forename: Afaf
authors.initials: A
authors.lastname: El-Sayed
authors.affiliation: Donostia International Physics Center, E-20018, Paseo Manuel Lardizabal 4, Donostia-San Sebastián, Spain.|Centro de Fisica de Materiales CSIC/UPV-EHU-Materials Physics Center, E-20018, Donostia-San Sebastián, Spain.|Universidad del Pais Vasco, Dpto. de Física Aplicada I, E-20018, Donostia-San Sebastián, Spain.
authors.forename: J Enrique
authors.initials: JE
authors.lastname: Ortega
authors.affiliation: Donostia International Physics Center, E-20018, Paseo Manuel Lardizabal 4, Donostia-San Sebastián, Spain.|Centro de Fisica de Materiales CSIC/UPV-EHU-Materials Physics Center, E-20018, Donostia-San Sebastián, Spain.|Ikerbasque, Basque Foundation for Science, E-48011, Bilbao, Spain.
authors.forename: Dimas G
authors.initials: DG
authors.lastname: de Oteyza
keywords: donor-acceptor blends; interface energetics; organic materials; organic semiconductors; self-assembly