Organic thin film morphology, electronic structure, and effect on optoelectronic device

There is a significant correlation in organic semiconductor thin films between the morphology and electronic structure, and both have strong effects on device performance. In this presentation, we describe our investigations on the relationship of the morphology and corresponding electronic structure and electrical properties using scanning probe microscopy techniques, photoemission spectroscopy, and transport measurements on organic semiconductor thin films. We also present investigations on the effects on optoelectronic device performance especially after controlling the morphology by quasi-epitaxial growth on representative organic semiconductors.