It is well known that the implementation of flexible organic electronic
devices (FEDs) in our everyday life improve and revolutionize several
aspects of our behavior. Although there has been considerable progress in
the area of flexible inorganic devices (based on Si), there are numerous
advances in the organic (semiconducting, conducting and insulating),
inorganic and hybrid (organic-inorganic) materials that exhibit customized
properties and stability, and in the synthesis and preparation methods,
which are characterized by a significant amount of multidisciplinary
efforts. The understanding of the organic material properties can lead to
the fast progress of the functionality and performance of flexible organic
electronic devices. An crucial ingredient for this is the strong
interdisciplinary nature of the area of organic electronics, which brings
together experts in chemistry, physics, and engineering, removing the
traditional boundaries between the individual disciplines. Therefore, the
understanding of the properties of organic insulators, semiconductors, and
conductors as well as the effect of their synthesis process, microstructure
and morphology is the goal of the current research efforts. In this work, we
summarize on the latest advances in the fields of organic (semi-) conducting
materials and hybrid barrier layers to be used as active layers and for the
encapsulation of the materials components for the production of FEDs (such
as flexible organic light-emitting diodes, and organic solar cells).