Artículos de revistas
High-Performance Ultrathin Molecular Rectifying Diodes Based on Organic/Inorganic Interface Engineering
Fecha
2022-02-01Registro en:
Advanced Functional Materials, v. 32, n. 6, 2022.
1616-3028
1616-301X
10.1002/adfm.202108478
2-s2.0-85118229576
Autor
Brazilian Center for Research in Energy and Materials (CNPEM)
Universidade Estadual Paulista (UNESP)
Universidade Estadual de Campinas (UNICAMP)
Mackenzie Presbyterian University
Institución
Resumen
The bottom-up engineering of organic/inorganic hybrids is a crucial step toward advanced nanomaterial technologies. Understanding the energy level alignment at hybrid interfaces provides a valuable comprehension of the systems′ electronic properties – which are decisive for well-designed device applications. Here, active interfaces of ultrathin (≈10 nm) molecular rectifying diodes that are capable of achieving a 4-order-magnitude rectification ratio along with 10 MHz cutoff frequency, both in a single nanodevice, are engineered. Atomic force microscopy and Kelvin-Probe analysis are employed to investigate the surface potential of the hybrid devices′ organic/inorganic interfaces, which comprise a metal (M) electrode in contact with a few-nanometer-thick copper phthalocyanine (CuPc) film. Thereby a nanometer-resolved quantification of the CuPc film work functions as well as the M/CuPc diode's space-charge densities are delivered. By recognizing that the molecular rectifying diode is a functional building block for nanoscale electronics, the findings address crucial advances to the design of high-performance molecular rectifiers based on organic/inorganic interface engineering.