An electron acceptor is a substance that accepts electrons in electron transport. So far, in the field of organic photovoltaic cells, a large number of researchers have devoted themselves to the study of electron donor materials, but the research progress of acceptor materials lags far behind that of electron donor materials. In recent years, it has become increasingly difficult to improve the efficiency of organic solar cells, suggesting that simply finding new electron donors will not improve the efficiency of cells significantly[1]. In addition, significant breakthroughs in the photoelectric conversion efficiency of organic solar cells are closely related to the research of new donor/acceptor materials.

Materials Fullerenes Fullerenes are closed caged molecules consisting of different numbers of non-planar five-membered and six-membered rings. It belongs to electron-deficient alkene, and its three-dimensional conjugated electronic structure makes it have good electron acquisition ability and photoelectric transmission performance, so it is often used as acceptor materials for organic solar cells. In the classical C60 fullerene structure, the absorption of PC71BM and PC84BM prepared by C71 and C84 is significantly stronger than that of PCBM in the visible region, and the photoelectric conversion efficiency is also enhanced compared with that of PCBM. Therefore, at present, the electron acceptor materials used in polymer solar cells with photoelectric conversion efficiency exceeding 7% all use the Fullerian derivative PC71BM.

Deuterated drugs refer to drugs obtained by replacing one or more carbon-hydrogen bonds (C-H) at specific metabolic sites on drug molecules with carbon-deuterium bonds (C-D). The conversion between isotopes changes the molecular physicochemical properties of deuterated drugs, giving them special pharmacokinetic properties, which in turn improves the efficacy and safety of the drugs.