Polymers for opto-electronic applications: structure and morphology of thin films and their interfaces

Organic-organic and metal-organic interfaces are explored. The influence of the morphology of thin films of MEH-phenylene-vinylene oligomer (OPVS):C-6 0 blends on their photovoltaic characteristics is demonstrated. An interdig itating structure is considered to be favorable for efficient operation. Th e design of a diblock copolymer for this specific application is discussed. By means of UPS, the electronic energy levels at the interface between OPV 5 and gold are assessed. Due to the formation of a dipole layer, the vacuum levels are not aligned and the barrier for charge injection is altered. (C ) 2001 Elsevier Science B.V. All rights reserved.