Synthesis and Application of Ferroelectric P(VDF-TrFE) Nanoparticles in Organic Photovoltaic Devices for High Efficiency

摘要

The power conversion efficiency (PCE) of organic photovoltaic devices has entered the over 10% era. Interlayers between the organic active layer and the electrodes play important roles in achieving high efficiencies. Many types of interlayers have been reported, such as metal oxides, polymer electrolytes, and low-work-function metals. Generally, these interlayers have the function of bridging the Fermi energy of the electrode and the energy levels of the organic semiconductor and increasing the built-in electric field in the devices. Recently, we reported a new category of air stable material, ferroelectric polymer poly(vinylidenefluoride-trifluoroethylene) (P(VDF-TrFE)), as a universal interlayer, which has tunable and high-density, aligned dipoles controlled by the external applied bias.