Triphenylamine−Oligothiophene Conjugated Systems as Organic Semiconductors for Opto-Electronics

摘要

Two novel “hybrid” systems consisting of a triphenylamine core carrying ð-conjugated terthienylbranches have been synthesized and characterized by differential scanning calorimetry, X-ray diffraction,cyclic voltammetry, UV-vis absorption, and fluorescence spectroscopy. The semiconductor potentialitiesof these compounds, which lead to glassy or amourphous films, have been evaluated by theirimplementation in very simple prototype devices that display electroluminescence at low voltage as wellas a photovoltaic effect. Moreover, field-effect transistors based on one of these novel molecules displaya high hole mobility (1.1 10-2 cm V-1 s-1). These results suggest that molecules leading to amorphousmaterials could represent a valid alternative as compared to systems that require control of the molecularorientation/organization