Organic Interfaces

Many of the most important processes in organic semiconductor devices (solar cells, light-emitting diodes, spin valves etc.) are fundamentally controlled by the electronic structure at the organic/electrode interface. The electronic structure at this interface differs fundamentally from that of the isolated components, and new states with unusual properties and dramatically changes to the molecular electronic structure appear. 

In LabMontiTM, we use a wide array of standard and cutting-edge photoelectron spectroscopies such as momentum microscopy, ultrafast two-photon photoemission (2PPE) in order to probe the ground and excited state interfacial electronic structure and their time evolution on timescales of 10-15s. We combine this with atomic force and scanning tunneling microscopy carried out at 5K at Brookhaven National Laboratory. This information is correlated with device performance in order to determine the relevant parameters for device operation and to develop a model of interface formation for organic electronic devices.