Functionalized triarylamines for applications in organic electronics

Over the last few decades significant progress has been made in the field of organic electronics which includes Organic light emitting diodes (OLEDs), Organic field effect transistors (OFETs) and Dye sensitized solar cells (DSSCs). Small organic pi-conjugated molecules with a donor-acceptor (D-A) architecture have attracted significant attention as compared to polymers. In organic electronics, typically an OLED consists of a hole-transporting materials (HTMs) (p-type materials) and electron-transporting material (ETMs) (n type materials). The efficiency and durability of organic electronic devices depend upon the stability of both the hole and electron-transporting materials. Triarylamine derivatives have been extensively utilized as both hole transporter and emissive material in opto-electronics, since they exhibit low ionization potential, reversible redox potential and bright fluorescence and very few reports are there for triarylamines as n-type materials. In this paper, triarylamines based D-A molecules are discussed for their possible applications as n-type and/or p-type and ambipolar materials in organic electronics.