FUNCTIONAL OLIGOTHIENYLENEVINYLENE-BASED MATERIALS FOR OPTOELECTRONICS

摘要: The burgeoning field of organic electronics is driven by the notion of mass-producing cheap and sustainable electronic devices. Future large-scale application of organic electronics should also focus on sustainability in order to address the current problem of electronic waste. In our recent activity we considered investigating natural and nature inspired materials for organic electronics applications1-4. We have demonstrated that nature is an immense reservoir of inexpensive materials that are suitable for the fabrication of organic electronic devices operating at state-of-the-art level1-4.Our investigation of naturally occurring pigments revealed interesting properties of those materials, such as strong dipolar interaction, ie hydrogen bonding. This type of chemical bond is a stronger dipolar force than typical van der Waals interaction featured by synthetic π–conjugated chromophores currently employed in organic electronics. H-bonding is ubiquitous in natural systems, being responsible for the unique properties of water and the forces holding together DNA and RNA strands, three of the systems that allows the existence of life on Earth. The consequence of H-bonding is the presence of highly ordered organic films that have a high dielectric constant. This long range intermolecular interaction tremendously influences the dynamics of photogenerated excited states in such molecules. Indigo and its synthetic derivatives represent an interesting class of organic semiconducting materials. Indigo for example is among the very few known blue-colored chromophores of truly natural-origin. Indigo (extracted from plants) and 6, 6’-dibromoindigo (Tyrian purple …