The Many Facets of Molecular Orientation in Organic Optoelectronics

Over the years, organic optoelectronics have evolved into a mature technology with a wide range of applications. Their building blocks, namely organic semiconductors, are distinctly different from their inorganic counterparts due to orientational degrees of freedom that offer unique possibilities for tailoring their properties in thin-film structures. In this article, the many facets that molecular orientation has for fundamental aspects, like film growth as well as optical and electrical behavior, are reviewed and the implications of molecular orientation for device application are discussed.