A nanocomposite interconnecting layer for tandem small molecular organic photovoltaic cells

摘要

A nanocomposite interconnecting layer of C60:LiF/Ag/MoO_x had been applied in the tandem structure of organic photovoltaic cells to achieve high short circuit current (J_(sc)) and power conversion efficiency (PCE). The J_(sc) had been enhanced 40% after applying the nanocomposite interconnecting layer into a tandem structure compared to the conventional interconnecting layer of Bathocuproine (BCP)/Ag/MoO_x. The improvement is due to the enhancement of the light absorption of the devices. A tandem device PCE of 3.04% was achieved by further improving the light absorption in the individual subcell units in the tandem structure by means of a bi-functional buffer layer of C60:LiF/BCP.