报告题目：Tuning of surface structure and property with organic layers and its application in organic electronic devices applications
The surface of a solid substrate can be systematically modified by the adsorption of properly chosen organic molecules. In particular, the adsorption of a well-ordered monolayer can alter the wetting, polarity (dipole moment), chemical reactivity, lattice, and surface potential at the surface. These in turn affect the packing, orientation and morphology of organic film that is deposited on the surface. In this talk, we demonstrate the application of self-assembled monolayers(SAMs)in modulating the interfacial structure commonly involved in organic electronic devices, such as organic light-emitting diodes, organic field-effect transistors and organic memories.
The barrier for charge injection from the electrode to the organic layer can be varied systematically and continuously with SAMs/mixed SAMs. Implication to the charge balance in OLED devices will be examined. Effect of SAMs modification of dielectric layer on the morphology and charge mobility of OFET devices will be also be examined. Finally, SAMs were used to modulate the surface property and charge trapping capability of Au nanoparticles in the fabrication of transistor/memory devices.