Nowadays, great research efforts to build organic electronic devices has provided a rapid advance in flexible, environmentally friendly and low cost devices, using organic semiconductors that combine optical and electronic properties of inorganic materials with the processing capabilities of polymeric materials. Moreover, with the use of natural materials arises the possibility to obtain biocompatible and biodegradable devices, which makes its application an attractive alternative to bioelectronics. Based on this retrospect, this proposal deals with the use of dyes of natural origin (such as melanin and indigo) in active layers of vertical organic field-effect transistor (VOFETs), since they have interesting physical and chemical properties, they are not toxic and are easy to obtain. The deposition of thin films will be from the spin-coating technique, and will be characterized from microscopy (AFM, SEM, confocal), optical spectroscopy, impedance spectroscopy and cyclic voltammetry. The characterization of VOFETs will be performed by IxV measures three terminals and also for the spin-dependent transport techniques. It is expected to obtain values comparable to the current state of the art for devices in this category.
News published in Agência FAPESP Newsletter about the scholarship: