Applications of Phosphorus‐Based Materials in Optoelectronics

This chapter highlights the different kinds of organophosphorus-based materials that have been used in electronic devices, such as organic light-emitting diodes (OLEDs), organic photovoltaic cells (OPVCs), dye-sensitized solar cells (DSSCs), organic field-effect transistors (OFETs), resistive memory devices and electrochromic cells. A family of four-membered P-Heterocyclic rings recently introduced as emitters into optoelectronic devices are the 1,2-dihydrophosphetes. Aryl phosphines are the most extensively researched group of organophosphorus materials due to their widespread use as ligands in transition metal catalysis. In the field of electronic devices, polyphosphazenes (PP) were initially used as electrolytes in Li-ion batteries because of their high thermal stability, flexibility, and ability to conduct lithium ions. In particular, given the electron affinity of phosphine oxide and phosphole oxide derivatives, the preparation of n-type OFETs is clearly a perspective for these organophosphorus compounds. Phospholes are unsaturated five-membered heterocycles incorporating a P-atom, can formally be regarded as a cisbutadiene moiety bridged by a phosphinidene (PR) unit.