Diffusion Mechanism in Ag/TCNQ Thin Films with Cu as Tracers

Abstract
Metalorganic thin film Ag-7,7,8,8-tetracyanoquinodimethane (TCNQ) is prepared by successive vacuum evaporation of Ag and TCNQ. The diffusion behavior in Ag-TCNQ is studied using Cu as a tracer, in combination with profile analyses by secondary ion mass spectroscopy (SIMS). The results show that the diffusion mechanism in Ag-TCNQ thin film is Ag ion diffusion accompanied by ion exchange.