Non-fullerene acceptors inaugurating a new era of organic photovoltaic research and technology

摘要

Organic photovoltaic (OPV) solar cells possess some unique merits, such as the potential to be fabricated at low cost, and the fact that they can be semi- transparent to highly transparent in visible light, flexible and lightweight. These properties are attractive for building integrated solar power generation and for portable devices. The active layer in an OPV cell typically consists of a blend of an electron donor (a low ionization energy material) and an electron acceptor (a high electron affinity material) with a bulk heterojunction structure that helps ensure effective light absorption, charge separation and transport of electrons and holes to their corresponding electrodes.